<?xml version="1.0" encoding="ascii"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>mpi4py.MPI.Cartcomm</title> <link rel="stylesheet" href="epydoc.css" type="text/css" /> <script type="text/javascript" src="epydoc.js"></script> </head> <body bgcolor="white" text="black" link="blue" vlink="#204080" alink="#204080"> <!-- ==================== NAVIGATION BAR ==================== --> <table class="navbar" border="0" width="100%" cellpadding="0" bgcolor="#a0c0ff" cellspacing="0"> <tr valign="middle"> <!-- Home link --> <th> <a href="mpi4py-module.html">Home</a> </th> <!-- Tree link --> <th> <a href="module-tree.html">Trees</a> </th> <!-- Index link --> <th> <a href="identifier-index.html">Indices</a> </th> <!-- Help link --> <th> <a href="help.html">Help</a> </th> <!-- Project homepage --> <th class="navbar" align="right" width="100%"> <table border="0" cellpadding="0" cellspacing="0"> <tr><th class="navbar" align="center" ><a class="navbar" target="_top" href="http://mpi4py.googlecode.com/">MPI for Python</a></th> </tr></table></th> </tr> </table> <table width="100%" cellpadding="0" cellspacing="0"> <tr valign="top"> <td width="100%"> <span class="breadcrumbs"> <a href="mpi4py-module.html">Package mpi4py</a> :: <a href="mpi4py.MPI-module.html">Module MPI</a> :: Class Cartcomm </span> </td> <td> <table cellpadding="0" cellspacing="0"> <!-- hide/show private --> <tr><td align="right"><span class="options">[<a href="javascript:void(0);" class="privatelink" onclick="toggle_private();">hide private</a>]</span></td></tr> <tr><td align="right"><span class="options" >[<a href="frames.html" target="_top">frames</a >] | <a href="mpi4py.MPI.Cartcomm-class.html" target="_top">no frames</a>]</span></td></tr> </table> </td> </tr> </table> <!-- ==================== CLASS DESCRIPTION ==================== --> <h1 class="epydoc">Class Cartcomm</h1><p class="nomargin-top"></p> <center> <center> <map id="class_hierarchy_for_cartcomm" name="class_hierarchy_for_cartcomm"> <area shape="rect" id="node1" href="mpi4py.MPI.Cartcomm-class.html" title="Cartcomm" alt="" coords="5,118,88,143"/> <area shape="rect" id="node2" href="mpi4py.MPI.Comm-class.html" title="Comm" alt="" coords="16,6,77,31"/> <area shape="rect" id="node3" href="mpi4py.MPI.Intracomm-class.html" title="Intracomm" alt="" coords="5,62,88,87"/> </map> <img src="class_hierarchy_for_cartcomm.png" alt='' usemap="#class_hierarchy_for_cartcomm" ismap="ismap" class="graph-without-title" /> </center> </center> <hr /> Cartesian topology intracommunicator <!-- ==================== INSTANCE METHODS ==================== --> <a name="section-InstanceMethods"></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">Instance Methods</span></td> <td align="right" valign="top" ><span class="options">[<a href="#section-InstanceMethods" 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"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a href="mpi4py.MPI.Cartcomm-class.html#Dup" class="summary-sig-name">Dup</a>(<span class="summary-sig-arg">self</span>)</span><br /> Duplicate an existing 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="Get_cart_rank"></a><span class="summary-sig-name">Get_cart_rank</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">coords</span>)</span><br /> Translate logical coordinates to ranks</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="Get_coords"></a><span class="summary-sig-name">Get_coords</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">int rank</span>)</span><br /> Translate ranks to logical coordinates</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="Get_dim"></a><span class="summary-sig-name">Get_dim</span>(<span class="summary-sig-arg">self</span>)</span><br /> Return number of dimensions</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="Get_topo"></a><span class="summary-sig-name">Get_topo</span>(<span class="summary-sig-arg">self</span>)</span><br /> Return information on the cartesian topology</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="Map"></a><span class="summary-sig-name">Map</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">dims</span>, <span class="summary-sig-arg">periods</span>=<span class="summary-sig-default">None</span>)</span><br /> Return an optimal placement for the calling process on the physical machine</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="Shift"></a><span class="summary-sig-name">Shift</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">int direction</span>, <span class="summary-sig-arg">int disp</span>)</span><br /> Return a tuple (source,dest) of process ranks for data shifting with Comm.Sendrecv()</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="Sub"></a><span class="summary-sig-name">Sub</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">remain_dims</span>)</span><br /> Return cartesian communicators that form lower-dimensional subgrids</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.Cartcomm-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 colspan="2" class="summary"> <p class="indent-wrapped-lines"><b>Inherited from <code><a href="mpi4py.MPI.Intracomm-class.html">Intracomm</a></code></b>: <code><a href="mpi4py.MPI.Intracomm-class.html#Accept">Accept</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Connect">Connect</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Create">Create</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Create_cart">Create_cart</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Create_dist_graph">Create_dist_graph</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Create_dist_graph_adjacent">Create_dist_graph_adjacent</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Create_graph">Create_graph</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Create_intercomm">Create_intercomm</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Exscan">Exscan</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Scan">Scan</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Spawn">Spawn</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Spawn_multiple">Spawn_multiple</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#Split">Split</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#exscan">exscan</a></code>, <code><a href="mpi4py.MPI.Intracomm-class.html#scan">scan</a></code> </p> <p class="indent-wrapped-lines"><b>Inherited from <code><a href="mpi4py.MPI.Comm-class.html">Comm</a></code></b>: <code><a href="mpi4py.MPI.Comm-class.html#Abort">Abort</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Allgather">Allgather</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Allgatherv">Allgatherv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Allreduce">Allreduce</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Alltoall">Alltoall</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Alltoallv">Alltoallv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Alltoallw">Alltoallw</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Barrier">Barrier</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Bcast">Bcast</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Bsend">Bsend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Bsend_init">Bsend_init</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Call_errhandler">Call_errhandler</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Clone">Clone</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Compare">Compare</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Create_keyval">Create_keyval</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Delete_attr">Delete_attr</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Disconnect">Disconnect</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Free">Free</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Free_keyval">Free_keyval</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Gather">Gather</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Gatherv">Gatherv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Get_attr">Get_attr</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Get_errhandler">Get_errhandler</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Get_group">Get_group</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Get_name">Get_name</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Get_parent">Get_parent</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Get_rank">Get_rank</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Get_size">Get_size</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Get_topology">Get_topology</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Ibsend">Ibsend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Iprobe">Iprobe</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Irecv">Irecv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Irsend">Irsend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Is_inter">Is_inter</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Is_intra">Is_intra</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Isend">Isend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Issend">Issend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Join">Join</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Probe">Probe</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Recv">Recv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Recv_init">Recv_init</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Reduce">Reduce</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Reduce_scatter">Reduce_scatter</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Reduce_scatter_block">Reduce_scatter_block</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Rsend">Rsend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Rsend_init">Rsend_init</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Scatter">Scatter</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Scatterv">Scatterv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Send">Send</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Send_init">Send_init</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Sendrecv">Sendrecv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Sendrecv_replace">Sendrecv_replace</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Set_attr">Set_attr</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Set_errhandler">Set_errhandler</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Set_name">Set_name</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Ssend">Ssend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#Ssend_init">Ssend_init</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#__eq__">__eq__</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#__ge__">__ge__</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#__gt__">__gt__</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#__le__">__le__</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#__lt__">__lt__</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#__ne__">__ne__</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#__nonzero__">__nonzero__</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#allgather">allgather</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#allreduce">allreduce</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#alltoall">alltoall</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#barrier">barrier</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#bcast">bcast</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#bsend">bsend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#f2py">f2py</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#gather">gather</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#ibsend">ibsend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#irecv">irecv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#isend">isend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#issend">issend</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#py2f">py2f</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#recv">recv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#reduce">reduce</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#scatter">scatter</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#send">send</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#sendrecv">sendrecv</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#ssend">ssend</a></code> </p> <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="coords"></a><span class="summary-name">coords</span><br /> coordinates </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <a name="dim"></a><span class="summary-name">dim</span><br /> number of dimensions </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <a name="dims"></a><span class="summary-name">dims</span><br /> dimensions </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <a name="ndim"></a><span class="summary-name">ndim</span><br /> number of dimensions </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <a name="periods"></a><span class="summary-name">periods</span><br /> periodicity </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <a name="topo"></a><span class="summary-name">topo</span><br /> topology information </td> </tr> <tr> <td colspan="2" class="summary"> <p class="indent-wrapped-lines"><b>Inherited from <code><a href="mpi4py.MPI.Comm-class.html">Comm</a></code></b>: <code><a href="mpi4py.MPI.Comm-class.html#group">group</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#is_inter">is_inter</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#is_intra">is_intra</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#name">name</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#rank">rank</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#size">size</a></code>, <code><a href="mpi4py.MPI.Comm-class.html#topology">topology</a></code> </p> <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="Dup"></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">Dup</span>(<span class="sig-arg">self</span>)</span> </h3> </td><td align="right" valign="top" > </td> </tr></table> Duplicate an existing communicator <dl class="fields"> <dt>Overrides: <a href="mpi4py.MPI.Intracomm-class.html#Dup">Intracomm.Dup</a> </dt> </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> <br /> <!-- ==================== NAVIGATION BAR ==================== --> <table class="navbar" border="0" width="100%" cellpadding="0" bgcolor="#a0c0ff" cellspacing="0"> <tr valign="middle"> <!-- Home link --> <th> <a href="mpi4py-module.html">Home</a> </th> <!-- Tree link --> <th> <a href="module-tree.html">Trees</a> 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