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Class Comm
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class Comm</h1><p class="nomargin-top"></p>
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Communicator
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<td align="left"><span class="table-header">Instance Methods</span></td>
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<td><span class="summary-sig"><a href="mpi4py.MPI.Comm-class.html#Abort" class="summary-sig-name">Abort</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">int errorcode</span>=<span class="summary-sig-default">0</span>)</span><br />
Terminate MPI execution environment</td>
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<td><span class="summary-sig"><a name="Allgather"></a><span class="summary-sig-name">Allgather</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>)</span><br />
Gather to All, gather data from all processes and
distribute it to all other processes in a group</td>
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<td><span class="summary-sig"><a name="Allgatherv"></a><span class="summary-sig-name">Allgatherv</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>)</span><br />
Gather to All Vector, gather data from all processes and
distribute it to all other processes in a group providing
different amount of data and displacements</td>
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<td><span class="summary-sig"><a name="Allreduce"></a><span class="summary-sig-name">Allreduce</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>,
<span class="summary-sig-arg">Op op</span>=<span class="summary-sig-default">SUM</span>)</span><br />
All Reduce</td>
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<td><span class="summary-sig"><a name="Alltoall"></a><span class="summary-sig-name">Alltoall</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>)</span><br />
All to All Scatter/Gather, send data from all to all
processes in a group</td>
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<td><span class="summary-sig"><a name="Alltoallv"></a><span class="summary-sig-name">Alltoallv</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>)</span><br />
All to All Scatter/Gather Vector, send data from all to all
processes in a group providing different amount of data and
displacements</td>
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<td><span class="summary-sig"><a name="Alltoallw"></a><span class="summary-sig-name">Alltoallw</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>)</span><br />
Generalized All-to-All communication allowing different
counts, displacements and datatypes for each partner</td>
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<td><span class="summary-sig"><a name="Barrier"></a><span class="summary-sig-name">Barrier</span>(<span class="summary-sig-arg">self</span>)</span><br />
Barrier synchronization</td>
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<td><span class="summary-sig"><a name="Bcast"></a><span class="summary-sig-name">Bcast</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Broadcast a message from one process
to all other processes in a group</td>
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<td><span class="summary-sig"><a name="Bsend"></a><span class="summary-sig-name">Bsend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Blocking send in buffered mode</td>
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<td><span class="summary-sig"><a name="Bsend_init"></a><span class="summary-sig-name">Bsend_init</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Persistent request for a send in buffered mode</td>
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<td><span class="summary-sig"><a name="Call_errhandler"></a><span class="summary-sig-name">Call_errhandler</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">int errorcode</span>)</span><br />
Call the error handler installed on a communicator</td>
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<td><span class="summary-sig"><a name="Clone"></a><span class="summary-sig-name">Clone</span>(<span class="summary-sig-arg">self</span>)</span><br />
Clone an existing communicator</td>
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<td><span class="summary-sig"><a name="Compare"></a><span class="summary-sig-name">Compare</span>(<span class="summary-sig-arg">type cls</span>,
<span class="summary-sig-arg">Comm comm1</span>,
<span class="summary-sig-arg">Comm comm2</span>)</span><br />
Compare two communicators</td>
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<td><span class="summary-sig"><a name="Disconnect"></a><span class="summary-sig-name">Disconnect</span>(<span class="summary-sig-arg">self</span>)</span><br />
Disconnect from a communicator</td>
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<td><span class="summary-sig"><a name="Free"></a><span class="summary-sig-name">Free</span>(<span class="summary-sig-arg">self</span>)</span><br />
Free a communicator</td>
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<td><span class="summary-sig"><a name="Gather"></a><span class="summary-sig-name">Gather</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Gather together values from a group of processes</td>
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<td><span class="summary-sig"><a name="Gatherv"></a><span class="summary-sig-name">Gatherv</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Gather Vector, gather data to one process from all other
processes in a group providing different amount of data and
displacements at the receiving sides</td>
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<td><span class="summary-sig"><a name="Get_attr"></a><span class="summary-sig-name">Get_attr</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">int keyval</span>)</span><br />
Retrieve attribute value by key</td>
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<td><span class="summary-sig"><a name="Get_errhandler"></a><span class="summary-sig-name">Get_errhandler</span>(<span class="summary-sig-arg">self</span>)</span><br />
Get the error handler for a communicator</td>
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<td><span class="summary-sig"><a name="Get_group"></a><span class="summary-sig-name">Get_group</span>(<span class="summary-sig-arg">self</span>)</span><br />
Access the group associated with a communicator</td>
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<td><span class="summary-sig"><a name="Get_name"></a><span class="summary-sig-name">Get_name</span>(<span class="summary-sig-arg">self</span>)</span><br />
Get the print name for this communicator</td>
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<td><span class="summary-sig"><a name="Get_parent"></a><span class="summary-sig-name">Get_parent</span>(<span class="summary-sig-arg">type cls</span>)</span><br />
Return the parent intercommunicator for this process</td>
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<td><span class="summary-sig"><a name="Get_rank"></a><span class="summary-sig-name">Get_rank</span>(<span class="summary-sig-arg">self</span>)</span><br />
Return the rank of this process in a communicator</td>
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<td><span class="summary-sig"><a name="Get_size"></a><span class="summary-sig-name">Get_size</span>(<span class="summary-sig-arg">self</span>)</span><br />
Return the number of processes in a communicator</td>
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<td><span class="summary-sig"><a name="Get_topology"></a><span class="summary-sig-name">Get_topology</span>(<span class="summary-sig-arg">self</span>)</span><br />
Determine the type of topology (if any)
associated with a communicator</td>
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<td><span class="summary-sig"><a name="Ibsend"></a><span class="summary-sig-name">Ibsend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Nonblocking send in buffered mode</td>
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<td><span class="summary-sig"><a name="Iprobe"></a><span class="summary-sig-name">Iprobe</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">int source</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">Status status</span>=<span class="summary-sig-default">None</span>)</span><br />
Nonblocking test for a message</td>
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<td><span class="summary-sig"><a name="Irecv"></a><span class="summary-sig-name">Irecv</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int source</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Nonblocking receive</td>
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<td><span class="summary-sig"><a name="Irsend"></a><span class="summary-sig-name">Irsend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Nonblocking send in ready mode</td>
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<td><span class="summary-sig"><a name="Is_inter"></a><span class="summary-sig-name">Is_inter</span>(<span class="summary-sig-arg">self</span>)</span><br />
Test to see if a comm is an intercommunicator</td>
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<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Is_intra"></a><span class="summary-sig-name">Is_intra</span>(<span class="summary-sig-arg">self</span>)</span><br />
Test to see if a comm is an intracommunicator</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Isend"></a><span class="summary-sig-name">Isend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Nonblocking send</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Issend"></a><span class="summary-sig-name">Issend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Nonblocking send in synchronous mode</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Join"></a><span class="summary-sig-name">Join</span>(<span class="summary-sig-arg">type cls</span>,
<span class="summary-sig-arg">int fd</span>)</span><br />
Create a intercommunicator by joining
two processes connected by a socket</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="mpi4py.MPI.Comm-class.html#Probe" class="summary-sig-name">Probe</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">int source</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">Status status</span>=<span class="summary-sig-default">None</span>)</span><br />
Blocking test for a message</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="mpi4py.MPI.Comm-class.html#Recv" class="summary-sig-name">Recv</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int source</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">Status status</span>=<span class="summary-sig-default">None</span>)</span><br />
Blocking receive</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Recv_init"></a><span class="summary-sig-name">Recv_init</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int source</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Create a persistent request for a receive</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Reduce"></a><span class="summary-sig-name">Reduce</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>,
<span class="summary-sig-arg">Op op</span>=<span class="summary-sig-default">SUM</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Reduce</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Reduce_scatter"></a><span class="summary-sig-name">Reduce_scatter</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>,
<span class="summary-sig-arg">recvcounts</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">Op op</span>=<span class="summary-sig-default">SUM</span>)</span><br />
Reduce-Scatter (vector version)</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Reduce_scatter_block"></a><span class="summary-sig-name">Reduce_scatter_block</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>,
<span class="summary-sig-arg">Op op</span>=<span class="summary-sig-default">SUM</span>)</span><br />
Reduce-Scatter Block (regular, non-vector version)</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Rsend"></a><span class="summary-sig-name">Rsend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Blocking send in ready mode</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Rsend_init"></a><span class="summary-sig-name">Rsend_init</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Persistent request for a send in ready mode</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Scatter"></a><span class="summary-sig-name">Scatter</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Scatter Vector, scatter data from one process
to all other processes in a group</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Scatterv"></a><span class="summary-sig-name">Scatterv</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">recvbuf</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Scatter data from one process to all other processes in a
group providing different amount of data and displacements at
the sending side</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="mpi4py.MPI.Comm-class.html#Send" class="summary-sig-name">Send</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Blocking send</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Send_init"></a><span class="summary-sig-name">Send_init</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Create a persistent request for a standard send</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="mpi4py.MPI.Comm-class.html#Sendrecv" class="summary-sig-name">Sendrecv</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendbuf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int sendtag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">recvbuf</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int source</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int recvtag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">Status status</span>=<span class="summary-sig-default">None</span>)</span><br />
Send and receive a message</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="mpi4py.MPI.Comm-class.html#Sendrecv_replace" class="summary-sig-name">Sendrecv_replace</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int sendtag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int source</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int recvtag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">Status status</span>=<span class="summary-sig-default">None</span>)</span><br />
Send and receive a message</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Set_errhandler"></a><span class="summary-sig-name">Set_errhandler</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">Errhandler errhandler</span>)</span><br />
Set the error handler for a communicator</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Set_name"></a><span class="summary-sig-name">Set_name</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">name</span>)</span><br />
Set the print name for this communicator</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Ssend"></a><span class="summary-sig-name">Ssend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Blocking send in synchronous mode</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="Ssend_init"></a><span class="summary-sig-name">Ssend_init</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">buf</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Persistent request for a send in synchronous mode</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="__eq__"></a><span class="summary-sig-name">__eq__</span>(<span class="summary-sig-arg">y</span>)</span><br />
x==y</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="__ge__"></a><span class="summary-sig-name">__ge__</span>(<span class="summary-sig-arg">y</span>)</span><br />
x>=y</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="__gt__"></a><span class="summary-sig-name">__gt__</span>(<span class="summary-sig-arg">y</span>)</span><br />
x>y</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="__le__"></a><span class="summary-sig-name">__le__</span>(<span class="summary-sig-arg">y</span>)</span><br />
x<=y</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="__lt__"></a><span class="summary-sig-name">__lt__</span>(<span class="summary-sig-arg">y</span>)</span><br />
x<y</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="__ne__"></a><span class="summary-sig-name">__ne__</span>(<span class="summary-sig-arg">y</span>)</span><br />
x!=y</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">a new object with type S, a subtype of T</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="mpi4py.MPI.Comm-class.html#__new__" class="summary-sig-name">__new__</a>(<span class="summary-sig-arg">S</span>,
<span class="summary-sig-arg">...</span>)</span></td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="__nonzero__"></a><span class="summary-sig-name">__nonzero__</span>()</span><br />
x != 0</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="allgather"></a><span class="summary-sig-name">allgather</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">recvobj</span>=<span class="summary-sig-default">None</span>)</span><br />
Gather to All</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="allreduce"></a><span class="summary-sig-name">allreduce</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">recvobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">op</span>=<span class="summary-sig-default">SUM</span>)</span><br />
Reduce to All</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="alltoall"></a><span class="summary-sig-name">alltoall</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">recvobj</span>=<span class="summary-sig-default">None</span>)</span><br />
All to All Scatter/Gather</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="barrier"></a><span class="summary-sig-name">barrier</span>(<span class="summary-sig-arg">self</span>)</span><br />
Barrier</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="bcast"></a><span class="summary-sig-name">bcast</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">obj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Broadcast</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="bsend"></a><span class="summary-sig-name">bsend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">obj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Send in buffered mode</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="f2py"></a><span class="summary-sig-name">f2py</span>(<span class="summary-sig-arg">type cls</span>,
<span class="summary-sig-arg">arg</span>)</span></td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="gather"></a><span class="summary-sig-name">gather</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">recvobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Gather</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="ibsend"></a><span class="summary-sig-name">ibsend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">obj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Nonblocking send in buffered mode</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="isend"></a><span class="summary-sig-name">isend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">obj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Nonblocking send</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="issend"></a><span class="summary-sig-name">issend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">obj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Nonblocking send in synchronous mode</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="py2f"></a><span class="summary-sig-name">py2f</span>(<span class="summary-sig-arg">self</span>)</span></td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="recv"></a><span class="summary-sig-name">recv</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">obj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int source</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">Status status</span>=<span class="summary-sig-default">None</span>)</span><br />
Receive</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="reduce"></a><span class="summary-sig-name">reduce</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">recvobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">op</span>=<span class="summary-sig-default">SUM</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Reduce</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="scatter"></a><span class="summary-sig-name">scatter</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">recvobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int root</span>=<span class="summary-sig-default">0</span>)</span><br />
Scatter</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="send"></a><span class="summary-sig-name">send</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">obj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Send</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="sendrecv"></a><span class="summary-sig-name">sendrecv</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">sendobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int sendtag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">recvobj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int source</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int recvtag</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">Status status</span>=<span class="summary-sig-default">None</span>)</span><br />
Send and Receive</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="ssend"></a><span class="summary-sig-name">ssend</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">obj</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">int dest</span>=<span class="summary-sig-default">0</span>,
<span class="summary-sig-arg">int tag</span>=<span class="summary-sig-default">0</span>)</span><br />
Send in synchronous mode</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="2" class="summary">
<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__delattr__</code>,
<code>__format__</code>,
<code>__getattribute__</code>,
<code>__hash__</code>,
<code>__init__</code>,
<code>__reduce__</code>,
<code>__reduce_ex__</code>,
<code>__repr__</code>,
<code>__setattr__</code>,
<code>__sizeof__</code>,
<code>__str__</code>,
<code>__subclasshook__</code>
</p>
</td>
</tr>
</table>
<!-- ==================== PROPERTIES ==================== -->
<a name="section-Properties"></a>
<table class="summary" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td colspan="2" class="table-header">
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr valign="top">
<td align="left"><span class="table-header">Properties</span></td>
<td align="right" valign="top"
><span class="options">[<a href="#section-Properties"
class="privatelink" onclick="toggle_private();"
>hide private</a>]</span></td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="group"></a><span class="summary-name">group</span><br />
communicator group
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="is_inter"></a><span class="summary-name">is_inter</span><br />
is intercommunicator
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="is_intra"></a><span class="summary-name">is_intra</span><br />
is intracommunicator
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="name"></a><span class="summary-name">name</span><br />
communicator name
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="rank"></a><span class="summary-name">rank</span><br />
rank of this process in communicator
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="size"></a><span class="summary-name">size</span><br />
number of processes in communicator
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="topology"></a><span class="summary-name">topology</span><br />
communicator topology type
</td>
</tr>
<tr>
<td colspan="2" class="summary">
<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__class__</code>
</p>
</td>
</tr>
</table>
<!-- ==================== METHOD DETAILS ==================== -->
<a name="section-MethodDetails"></a>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td colspan="2" class="table-header">
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr valign="top">
<td align="left"><span class="table-header">Method Details</span></td>
<td align="right" valign="top"
><span class="options">[<a href="#section-MethodDetails"
class="privatelink" onclick="toggle_private();"
>hide private</a>]</span></td>
</tr>
</table>
</td>
</tr>
</table>
<a name="Abort"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">Abort</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">int errorcode</span>=<span class="sig-default">0</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Terminate MPI execution environment</p>
This is a direct call, use it with care!!!.
<dl class="fields">
</dl>
</td></tr></table>
</div>
<a name="Probe"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">Probe</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">int source</span>=<span class="sig-default">0</span>,
<span class="sig-arg">int tag</span>=<span class="sig-default">0</span>,
<span class="sig-arg">Status status</span>=<span class="sig-default">None</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Blocking test for a message</p>
This function blocks until the message arrives.
<dl class="fields">
</dl>
</td></tr></table>
</div>
<a name="Recv"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">Recv</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">buf</span>,
<span class="sig-arg">int source</span>=<span class="sig-default">0</span>,
<span class="sig-arg">int tag</span>=<span class="sig-default">0</span>,
<span class="sig-arg">Status status</span>=<span class="sig-default">None</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Blocking receive</p>
This function blocks until the message is received
<dl class="fields">
</dl>
</td></tr></table>
</div>
<a name="Send"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">Send</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">buf</span>,
<span class="sig-arg">int dest</span>=<span class="sig-default">0</span>,
<span class="sig-arg">int tag</span>=<span class="sig-default">0</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Blocking send</p>
This function may block until the message is
received. Whether or not <a href="mpi4py.MPI.Comm-class.html#Send" class="link">Send</a> blocks depends on
several factors and is implementation dependent
<dl class="fields">
</dl>
</td></tr></table>
</div>
<a name="Sendrecv"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">Sendrecv</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">sendbuf</span>,
<span class="sig-arg">int dest</span>=<span class="sig-default">0</span>,
<span class="sig-arg">int sendtag</span>=<span class="sig-default">0</span>,
<span class="sig-arg">recvbuf</span>=<span class="sig-default">None</span>,
<span class="sig-arg">int source</span>=<span class="sig-default">0</span>,
<span class="sig-arg">int recvtag</span>=<span class="sig-default">0</span>,
<span class="sig-arg">Status status</span>=<span class="sig-default">None</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Send and receive a message</p>
This function is guaranteed not to deadlock in
situations where pairs of blocking sends and receives may
deadlock.A common mistake when using this function is to
mismatch the tags with the source and destination ranks,
which can result in deadlock.
<dl class="fields">
</dl>
</td></tr></table>
</div>
<a name="Sendrecv_replace"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">Sendrecv_replace</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">buf</span>,
<span class="sig-arg">int dest</span>=<span class="sig-default">0</span>,
<span class="sig-arg">int sendtag</span>=<span class="sig-default">0</span>,
<span class="sig-arg">int source</span>=<span class="sig-default">0</span>,
<span class="sig-arg">int recvtag</span>=<span class="sig-default">0</span>,
<span class="sig-arg">Status status</span>=<span class="sig-default">None</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Send and receive a message</p>
This function is guaranteed not to deadlock in
situations where pairs of blocking sends and receives may
deadlock.A common mistake when using this function is to
mismatch the tags with the source and destination ranks,
which can result in deadlock.
<dl class="fields">
</dl>
</td></tr></table>
</div>
<a name="__new__"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">__new__</span>(<span class="sig-arg">S</span>,
<span class="sig-arg">...</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<dl class="fields">
<dt>Returns: a new object with type S, a subtype of T</dt>
<dt>Overrides:
object.__new__
</dt>
</dl>
</td></tr></table>
</div>
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