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<div class="section" id="module-ftplib">
<span id="ftplib-ftp-protocol-client"></span><h1>21.13. <a class="reference internal" href="#module-ftplib" title="ftplib: FTP protocol client (requires sockets)."><code class="xref py py-mod docutils literal"><span class="pre">ftplib</span></code></a> — FTP protocol client<a class="headerlink" href="#module-ftplib" title="Permalink to this headline">¶</a></h1>
<p><strong>Source code:</strong> <a class="reference external" href="https://hg.python.org/cpython/file/3.5/Lib/ftplib.py">Lib/ftplib.py</a></p>
<hr class="docutils" id="index-0" />
<p>This module defines the class <a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a> and a few related items. The
<a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a> class implements the client side of the FTP protocol. You can use
this to write Python programs that perform a variety of automated FTP jobs, such
as mirroring other FTP servers. It is also used by the module
<a class="reference internal" href="urllib.request.html#module-urllib.request" title="urllib.request: Extensible library for opening URLs."><code class="xref py py-mod docutils literal"><span class="pre">urllib.request</span></code></a> to handle URLs that use FTP. For more information on FTP
(File Transfer Protocol), see Internet <span class="target" id="index-1"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc959.html"><strong>RFC 959</strong></a>.</p>
<p>Here’s a sample session using the <a class="reference internal" href="#module-ftplib" title="ftplib: FTP protocol client (requires sockets)."><code class="xref py py-mod docutils literal"><span class="pre">ftplib</span></code></a> module:</p>
<div class="highlight-python3"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">ftplib</span> <span class="k">import</span> <span class="n">FTP</span>
<span class="gp">>>> </span><span class="n">ftp</span> <span class="o">=</span> <span class="n">FTP</span><span class="p">(</span><span class="s1">'ftp.debian.org'</span><span class="p">)</span> <span class="c1"># connect to host, default port</span>
<span class="gp">>>> </span><span class="n">ftp</span><span class="o">.</span><span class="n">login</span><span class="p">()</span> <span class="c1"># user anonymous, passwd anonymous@</span>
<span class="go">'230 Login successful.'</span>
<span class="gp">>>> </span><span class="n">ftp</span><span class="o">.</span><span class="n">cwd</span><span class="p">(</span><span class="s1">'debian'</span><span class="p">)</span> <span class="c1"># change into "debian" directory</span>
<span class="gp">>>> </span><span class="n">ftp</span><span class="o">.</span><span class="n">retrlines</span><span class="p">(</span><span class="s1">'LIST'</span><span class="p">)</span> <span class="c1"># list directory contents</span>
<span class="go">-rw-rw-r-- 1 1176 1176 1063 Jun 15 10:18 README</span>
<span class="gp">...</span>
<span class="go">drwxr-sr-x 5 1176 1176 4096 Dec 19 2000 pool</span>
<span class="go">drwxr-sr-x 4 1176 1176 4096 Nov 17 2008 project</span>
<span class="go">drwxr-xr-x 3 1176 1176 4096 Oct 10 2012 tools</span>
<span class="go">'226 Directory send OK.'</span>
<span class="gp">>>> </span><span class="n">ftp</span><span class="o">.</span><span class="n">retrbinary</span><span class="p">(</span><span class="s1">'RETR README'</span><span class="p">,</span> <span class="nb">open</span><span class="p">(</span><span class="s1">'README'</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span><span class="o">.</span><span class="n">write</span><span class="p">)</span>
<span class="go">'226 Transfer complete.'</span>
<span class="gp">>>> </span><span class="n">ftp</span><span class="o">.</span><span class="n">quit</span><span class="p">()</span>
</pre></div>
</div>
<p>The module defines the following items:</p>
<dl class="class">
<dt id="ftplib.FTP">
<em class="property">class </em><code class="descclassname">ftplib.</code><code class="descname">FTP</code><span class="sig-paren">(</span><em>host=''</em>, <em>user=''</em>, <em>passwd=''</em>, <em>acct=''</em>, <em>timeout=None</em>, <em>source_address=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a new instance of the <a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a> class. When <em>host</em> is given, the
method call <code class="docutils literal"><span class="pre">connect(host)</span></code> is made. When <em>user</em> is given, additionally
the method call <code class="docutils literal"><span class="pre">login(user,</span> <span class="pre">passwd,</span> <span class="pre">acct)</span></code> is made (where <em>passwd</em> and
<em>acct</em> default to the empty string when not given). The optional <em>timeout</em>
parameter specifies a timeout in seconds for blocking operations like the
connection attempt (if is not specified, the global default timeout setting
will be used). <em>source_address</em> is a 2-tuple <code class="docutils literal"><span class="pre">(host,</span> <span class="pre">port)</span></code> for the socket
to bind to as its source address before connecting.</p>
<p>The <a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a> class supports the <a class="reference internal" href="../reference/compound_stmts.html#with"><code class="xref std std-keyword docutils literal"><span class="pre">with</span></code></a> statement, e.g.:</p>
<div class="highlight-python3"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">ftplib</span> <span class="k">import</span> <span class="n">FTP</span>
<span class="gp">>>> </span><span class="k">with</span> <span class="n">FTP</span><span class="p">(</span><span class="s2">"ftp1.at.proftpd.org"</span><span class="p">)</span> <span class="k">as</span> <span class="n">ftp</span><span class="p">:</span>
<span class="gp">... </span> <span class="n">ftp</span><span class="o">.</span><span class="n">login</span><span class="p">()</span>
<span class="gp">... </span> <span class="n">ftp</span><span class="o">.</span><span class="n">dir</span><span class="p">()</span>
<span class="gp">... </span>
<span class="go">'230 Anonymous login ok, restrictions apply.'</span>
<span class="go">dr-xr-xr-x 9 ftp ftp 154 May 6 10:43 .</span>
<span class="go">dr-xr-xr-x 9 ftp ftp 154 May 6 10:43 ..</span>
<span class="go">dr-xr-xr-x 5 ftp ftp 4096 May 6 10:43 CentOS</span>
<span class="go">dr-xr-xr-x 3 ftp ftp 18 Jul 10 2008 Fedora</span>
<span class="go">>>></span>
</pre></div>
</div>
<div class="versionchanged">
<p><span class="versionmodified">Changed in version 3.2: </span>Support for the <a class="reference internal" href="../reference/compound_stmts.html#with"><code class="xref std std-keyword docutils literal"><span class="pre">with</span></code></a> statement was added.</p>
</div>
<div class="versionchanged">
<p><span class="versionmodified">Changed in version 3.3: </span><em>source_address</em> parameter was added.</p>
</div>
</dd></dl>
<dl class="class">
<dt id="ftplib.FTP_TLS">
<em class="property">class </em><code class="descclassname">ftplib.</code><code class="descname">FTP_TLS</code><span class="sig-paren">(</span><em>host=''</em>, <em>user=''</em>, <em>passwd=''</em>, <em>acct=''</em>, <em>keyfile=None</em>, <em>certfile=None</em>, <em>context=None</em>, <em>timeout=None</em>, <em>source_address=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP_TLS" title="Permalink to this definition">¶</a></dt>
<dd><p>A <a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a> subclass which adds TLS support to FTP as described in
<span class="target" id="index-2"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc4217.html"><strong>RFC 4217</strong></a>.
Connect as usual to port 21 implicitly securing the FTP control connection
before authenticating. Securing the data connection requires the user to
explicitly ask for it by calling the <a class="reference internal" href="#ftplib.FTP_TLS.prot_p" title="ftplib.FTP_TLS.prot_p"><code class="xref py py-meth docutils literal"><span class="pre">prot_p()</span></code></a> method. <em>context</em>
is a <a class="reference internal" href="ssl.html#ssl.SSLContext" title="ssl.SSLContext"><code class="xref py py-class docutils literal"><span class="pre">ssl.SSLContext</span></code></a> object which allows bundling SSL configuration
options, certificates and private keys into a single (potentially
long-lived) structure. Please read <a class="reference internal" href="ssl.html#ssl-security"><span>Security considerations</span></a> for best practices.</p>
<p><em>keyfile</em> and <em>certfile</em> are a legacy alternative to <em>context</em> – they
can point to PEM-formatted private key and certificate chain files
(respectively) for the SSL connection.</p>
<div class="versionadded">
<p><span class="versionmodified">New in version 3.2.</span></p>
</div>
<div class="versionchanged">
<p><span class="versionmodified">Changed in version 3.3: </span><em>source_address</em> parameter was added.</p>
</div>
<div class="versionchanged">
<p><span class="versionmodified">Changed in version 3.4: </span>The class now supports hostname check with
<a class="reference internal" href="ssl.html#ssl.SSLContext.check_hostname" title="ssl.SSLContext.check_hostname"><code class="xref py py-attr docutils literal"><span class="pre">ssl.SSLContext.check_hostname</span></code></a> and <em>Server Name Indication</em> (see
<a class="reference internal" href="ssl.html#ssl.HAS_SNI" title="ssl.HAS_SNI"><code class="xref py py-data docutils literal"><span class="pre">ssl.HAS_SNI</span></code></a>).</p>
</div>
<p>Here’s a sample session using the <a class="reference internal" href="#ftplib.FTP_TLS" title="ftplib.FTP_TLS"><code class="xref py py-class docutils literal"><span class="pre">FTP_TLS</span></code></a> class:</p>
<div class="highlight-python3"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">ftps</span> <span class="o">=</span> <span class="n">FTP_TLS</span><span class="p">(</span><span class="s1">'ftp.pureftpd.org'</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">ftps</span><span class="o">.</span><span class="n">login</span><span class="p">()</span>
<span class="go">'230 Anonymous user logged in'</span>
<span class="gp">>>> </span><span class="n">ftps</span><span class="o">.</span><span class="n">prot_p</span><span class="p">()</span>
<span class="go">'200 Data protection level set to "private"'</span>
<span class="gp">>>> </span><span class="n">ftps</span><span class="o">.</span><span class="n">nlst</span><span class="p">()</span>
<span class="go">['6jack', 'OpenBSD', 'antilink', 'blogbench', 'bsdcam', 'clockspeed', 'djbdns-jedi', 'docs', 'eaccelerator-jedi', 'favicon.ico', 'francotone', 'fugu', 'ignore', 'libpuzzle', 'metalog', 'minidentd', 'misc', 'mysql-udf-global-user-variables', 'php-jenkins-hash', 'php-skein-hash', 'php-webdav', 'phpaudit', 'phpbench', 'pincaster', 'ping', 'posto', 'pub', 'public', 'public_keys', 'pure-ftpd', 'qscan', 'qtc', 'sharedance', 'skycache', 'sound', 'tmp', 'ucarp']</span>
</pre></div>
</div>
</dd></dl>
<dl class="exception">
<dt id="ftplib.error_reply">
<em class="property">exception </em><code class="descclassname">ftplib.</code><code class="descname">error_reply</code><a class="headerlink" href="#ftplib.error_reply" title="Permalink to this definition">¶</a></dt>
<dd><p>Exception raised when an unexpected reply is received from the server.</p>
</dd></dl>
<dl class="exception">
<dt id="ftplib.error_temp">
<em class="property">exception </em><code class="descclassname">ftplib.</code><code class="descname">error_temp</code><a class="headerlink" href="#ftplib.error_temp" title="Permalink to this definition">¶</a></dt>
<dd><p>Exception raised when an error code signifying a temporary error (response
codes in the range 400–499) is received.</p>
</dd></dl>
<dl class="exception">
<dt id="ftplib.error_perm">
<em class="property">exception </em><code class="descclassname">ftplib.</code><code class="descname">error_perm</code><a class="headerlink" href="#ftplib.error_perm" title="Permalink to this definition">¶</a></dt>
<dd><p>Exception raised when an error code signifying a permanent error (response
codes in the range 500–599) is received.</p>
</dd></dl>
<dl class="exception">
<dt id="ftplib.error_proto">
<em class="property">exception </em><code class="descclassname">ftplib.</code><code class="descname">error_proto</code><a class="headerlink" href="#ftplib.error_proto" title="Permalink to this definition">¶</a></dt>
<dd><p>Exception raised when a reply is received from the server that does not fit
the response specifications of the File Transfer Protocol, i.e. begin with a
digit in the range 1–5.</p>
</dd></dl>
<dl class="data">
<dt id="ftplib.all_errors">
<code class="descclassname">ftplib.</code><code class="descname">all_errors</code><a class="headerlink" href="#ftplib.all_errors" title="Permalink to this definition">¶</a></dt>
<dd><p>The set of all exceptions (as a tuple) that methods of <a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a>
instances may raise as a result of problems with the FTP connection (as
opposed to programming errors made by the caller). This set includes the
four exceptions listed above as well as <a class="reference internal" href="exceptions.html#OSError" title="OSError"><code class="xref py py-exc docutils literal"><span class="pre">OSError</span></code></a>.</p>
</dd></dl>
<div class="admonition seealso">
<p class="first admonition-title">See also</p>
<dl class="last docutils">
<dt>Module <a class="reference internal" href="netrc.html#module-netrc" title="netrc: Loading of .netrc files."><code class="xref py py-mod docutils literal"><span class="pre">netrc</span></code></a></dt>
<dd>Parser for the <code class="file docutils literal"><span class="pre">.netrc</span></code> file format. The file <code class="file docutils literal"><span class="pre">.netrc</span></code> is
typically used by FTP clients to load user authentication information
before prompting the user.</dd>
</dl>
</div>
<div class="section" id="ftp-objects">
<span id="id1"></span><h2>21.13.1. FTP Objects<a class="headerlink" href="#ftp-objects" title="Permalink to this headline">¶</a></h2>
<p>Several methods are available in two flavors: one for handling text files and
another for binary files. These are named for the command which is used
followed by <code class="docutils literal"><span class="pre">lines</span></code> for the text version or <code class="docutils literal"><span class="pre">binary</span></code> for the binary version.</p>
<p><a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a> instances have the following methods:</p>
<dl class="method">
<dt id="ftplib.FTP.set_debuglevel">
<code class="descclassname">FTP.</code><code class="descname">set_debuglevel</code><span class="sig-paren">(</span><em>level</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.set_debuglevel" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the instance’s debugging level. This controls the amount of debugging
output printed. The default, <code class="docutils literal"><span class="pre">0</span></code>, produces no debugging output. A value of
<code class="docutils literal"><span class="pre">1</span></code> produces a moderate amount of debugging output, generally a single line
per request. A value of <code class="docutils literal"><span class="pre">2</span></code> or higher produces the maximum amount of
debugging output, logging each line sent and received on the control connection.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.connect">
<code class="descclassname">FTP.</code><code class="descname">connect</code><span class="sig-paren">(</span><em>host=''</em>, <em>port=0</em>, <em>timeout=None</em>, <em>source_address=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.connect" title="Permalink to this definition">¶</a></dt>
<dd><p>Connect to the given host and port. The default port number is <code class="docutils literal"><span class="pre">21</span></code>, as
specified by the FTP protocol specification. It is rarely needed to specify a
different port number. This function should be called only once for each
instance; it should not be called at all if a host was given when the instance
was created. All other methods can only be used after a connection has been
made.
The optional <em>timeout</em> parameter specifies a timeout in seconds for the
connection attempt. If no <em>timeout</em> is passed, the global default timeout
setting will be used.
<em>source_address</em> is a 2-tuple <code class="docutils literal"><span class="pre">(host,</span> <span class="pre">port)</span></code> for the socket to bind to as
its source address before connecting.</p>
<div class="versionchanged">
<p><span class="versionmodified">Changed in version 3.3: </span><em>source_address</em> parameter was added.</p>
</div>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.getwelcome">
<code class="descclassname">FTP.</code><code class="descname">getwelcome</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.getwelcome" title="Permalink to this definition">¶</a></dt>
<dd><p>Return the welcome message sent by the server in reply to the initial
connection. (This message sometimes contains disclaimers or help information
that may be relevant to the user.)</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.login">
<code class="descclassname">FTP.</code><code class="descname">login</code><span class="sig-paren">(</span><em>user='anonymous'</em>, <em>passwd=''</em>, <em>acct=''</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.login" title="Permalink to this definition">¶</a></dt>
<dd><p>Log in as the given <em>user</em>. The <em>passwd</em> and <em>acct</em> parameters are optional and
default to the empty string. If no <em>user</em> is specified, it defaults to
<code class="docutils literal"><span class="pre">'anonymous'</span></code>. If <em>user</em> is <code class="docutils literal"><span class="pre">'anonymous'</span></code>, the default <em>passwd</em> is
<code class="docutils literal"><span class="pre">'anonymous@'</span></code>. This function should be called only once for each instance,
after a connection has been established; it should not be called at all if a
host and user were given when the instance was created. Most FTP commands are
only allowed after the client has logged in. The <em>acct</em> parameter supplies
“accounting information”; few systems implement this.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.abort">
<code class="descclassname">FTP.</code><code class="descname">abort</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.abort" title="Permalink to this definition">¶</a></dt>
<dd><p>Abort a file transfer that is in progress. Using this does not always work, but
it’s worth a try.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.sendcmd">
<code class="descclassname">FTP.</code><code class="descname">sendcmd</code><span class="sig-paren">(</span><em>cmd</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.sendcmd" title="Permalink to this definition">¶</a></dt>
<dd><p>Send a simple command string to the server and return the response string.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.voidcmd">
<code class="descclassname">FTP.</code><code class="descname">voidcmd</code><span class="sig-paren">(</span><em>cmd</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.voidcmd" title="Permalink to this definition">¶</a></dt>
<dd><p>Send a simple command string to the server and handle the response. Return
nothing if a response code corresponding to success (codes in the range
200–299) is received. Raise <a class="reference internal" href="#ftplib.error_reply" title="ftplib.error_reply"><code class="xref py py-exc docutils literal"><span class="pre">error_reply</span></code></a> otherwise.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.retrbinary">
<code class="descclassname">FTP.</code><code class="descname">retrbinary</code><span class="sig-paren">(</span><em>cmd</em>, <em>callback</em>, <em>blocksize=8192</em>, <em>rest=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.retrbinary" title="Permalink to this definition">¶</a></dt>
<dd><p>Retrieve a file in binary transfer mode. <em>cmd</em> should be an appropriate
<code class="docutils literal"><span class="pre">RETR</span></code> command: <code class="docutils literal"><span class="pre">'RETR</span> <span class="pre">filename'</span></code>. The <em>callback</em> function is called for
each block of data received, with a single string argument giving the data
block. The optional <em>blocksize</em> argument specifies the maximum chunk size to
read on the low-level socket object created to do the actual transfer (which
will also be the largest size of the data blocks passed to <em>callback</em>). A
reasonable default is chosen. <em>rest</em> means the same thing as in the
<a class="reference internal" href="#ftplib.FTP.transfercmd" title="ftplib.FTP.transfercmd"><code class="xref py py-meth docutils literal"><span class="pre">transfercmd()</span></code></a> method.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.retrlines">
<code class="descclassname">FTP.</code><code class="descname">retrlines</code><span class="sig-paren">(</span><em>cmd</em>, <em>callback=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.retrlines" title="Permalink to this definition">¶</a></dt>
<dd><p>Retrieve a file or directory listing in ASCII transfer mode. <em>cmd</em> should be
an appropriate <code class="docutils literal"><span class="pre">RETR</span></code> command (see <a class="reference internal" href="#ftplib.FTP.retrbinary" title="ftplib.FTP.retrbinary"><code class="xref py py-meth docutils literal"><span class="pre">retrbinary()</span></code></a>) or a command such as
<code class="docutils literal"><span class="pre">LIST</span></code> or <code class="docutils literal"><span class="pre">NLST</span></code> (usually just the string <code class="docutils literal"><span class="pre">'LIST'</span></code>).
<code class="docutils literal"><span class="pre">LIST</span></code> retrieves a list of files and information about those files.
<code class="docutils literal"><span class="pre">NLST</span></code> retrieves a list of file names.
The <em>callback</em> function is called for each line with a string argument
containing the line with the trailing CRLF stripped. The default <em>callback</em>
prints the line to <code class="docutils literal"><span class="pre">sys.stdout</span></code>.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.set_pasv">
<code class="descclassname">FTP.</code><code class="descname">set_pasv</code><span class="sig-paren">(</span><em>boolean</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.set_pasv" title="Permalink to this definition">¶</a></dt>
<dd><p>Enable “passive” mode if <em>boolean</em> is true, other disable passive mode.
Passive mode is on by default.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.storbinary">
<code class="descclassname">FTP.</code><code class="descname">storbinary</code><span class="sig-paren">(</span><em>cmd</em>, <em>fp</em>, <em>blocksize=8192</em>, <em>callback=None</em>, <em>rest=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.storbinary" title="Permalink to this definition">¶</a></dt>
<dd><p>Store a file in binary transfer mode. <em>cmd</em> should be an appropriate
<code class="docutils literal"><span class="pre">STOR</span></code> command: <code class="docutils literal"><span class="pre">"STOR</span> <span class="pre">filename"</span></code>. <em>fp</em> is a <a class="reference internal" href="../glossary.html#term-file-object"><span class="xref std std-term">file object</span></a>
(opened in binary mode) which is read until EOF using its <code class="xref py py-meth docutils literal"><span class="pre">read()</span></code>
method in blocks of size <em>blocksize</em> to provide the data to be stored.
The <em>blocksize</em> argument defaults to 8192. <em>callback</em> is an optional single
parameter callable that is called on each block of data after it is sent.
<em>rest</em> means the same thing as in the <a class="reference internal" href="#ftplib.FTP.transfercmd" title="ftplib.FTP.transfercmd"><code class="xref py py-meth docutils literal"><span class="pre">transfercmd()</span></code></a> method.</p>
<div class="versionchanged">
<p><span class="versionmodified">Changed in version 3.2: </span><em>rest</em> parameter added.</p>
</div>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.storlines">
<code class="descclassname">FTP.</code><code class="descname">storlines</code><span class="sig-paren">(</span><em>cmd</em>, <em>fp</em>, <em>callback=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.storlines" title="Permalink to this definition">¶</a></dt>
<dd><p>Store a file in ASCII transfer mode. <em>cmd</em> should be an appropriate
<code class="docutils literal"><span class="pre">STOR</span></code> command (see <a class="reference internal" href="#ftplib.FTP.storbinary" title="ftplib.FTP.storbinary"><code class="xref py py-meth docutils literal"><span class="pre">storbinary()</span></code></a>). Lines are read until EOF from the
<a class="reference internal" href="../glossary.html#term-file-object"><span class="xref std std-term">file object</span></a> <em>fp</em> (opened in binary mode) using its <a class="reference internal" href="io.html#io.IOBase.readline" title="io.IOBase.readline"><code class="xref py py-meth docutils literal"><span class="pre">readline()</span></code></a>
method to provide the data to be stored. <em>callback</em> is an optional single
parameter callable that is called on each line after it is sent.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.transfercmd">
<code class="descclassname">FTP.</code><code class="descname">transfercmd</code><span class="sig-paren">(</span><em>cmd</em>, <em>rest=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.transfercmd" title="Permalink to this definition">¶</a></dt>
<dd><p>Initiate a transfer over the data connection. If the transfer is active, send an
<code class="docutils literal"><span class="pre">EPRT</span></code> or <code class="docutils literal"><span class="pre">PORT</span></code> command and the transfer command specified by <em>cmd</em>, and
accept the connection. If the server is passive, send an <code class="docutils literal"><span class="pre">EPSV</span></code> or <code class="docutils literal"><span class="pre">PASV</span></code>
command, connect to it, and start the transfer command. Either way, return the
socket for the connection.</p>
<p>If optional <em>rest</em> is given, a <code class="docutils literal"><span class="pre">REST</span></code> command is sent to the server, passing
<em>rest</em> as an argument. <em>rest</em> is usually a byte offset into the requested file,
telling the server to restart sending the file’s bytes at the requested offset,
skipping over the initial bytes. Note however that RFC 959 requires only that
<em>rest</em> be a string containing characters in the printable range from ASCII code
33 to ASCII code 126. The <a class="reference internal" href="#ftplib.FTP.transfercmd" title="ftplib.FTP.transfercmd"><code class="xref py py-meth docutils literal"><span class="pre">transfercmd()</span></code></a> method, therefore, converts
<em>rest</em> to a string, but no check is performed on the string’s contents. If the
server does not recognize the <code class="docutils literal"><span class="pre">REST</span></code> command, an <a class="reference internal" href="#ftplib.error_reply" title="ftplib.error_reply"><code class="xref py py-exc docutils literal"><span class="pre">error_reply</span></code></a> exception
will be raised. If this happens, simply call <a class="reference internal" href="#ftplib.FTP.transfercmd" title="ftplib.FTP.transfercmd"><code class="xref py py-meth docutils literal"><span class="pre">transfercmd()</span></code></a> without a
<em>rest</em> argument.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.ntransfercmd">
<code class="descclassname">FTP.</code><code class="descname">ntransfercmd</code><span class="sig-paren">(</span><em>cmd</em>, <em>rest=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.ntransfercmd" title="Permalink to this definition">¶</a></dt>
<dd><p>Like <a class="reference internal" href="#ftplib.FTP.transfercmd" title="ftplib.FTP.transfercmd"><code class="xref py py-meth docutils literal"><span class="pre">transfercmd()</span></code></a>, but returns a tuple of the data connection and the
expected size of the data. If the expected size could not be computed, <code class="docutils literal"><span class="pre">None</span></code>
will be returned as the expected size. <em>cmd</em> and <em>rest</em> means the same thing as
in <a class="reference internal" href="#ftplib.FTP.transfercmd" title="ftplib.FTP.transfercmd"><code class="xref py py-meth docutils literal"><span class="pre">transfercmd()</span></code></a>.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.mlsd">
<code class="descclassname">FTP.</code><code class="descname">mlsd</code><span class="sig-paren">(</span><em>path=""</em>, <em>facts=[]</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.mlsd" title="Permalink to this definition">¶</a></dt>
<dd><p>List a directory in a standardized format by using <code class="docutils literal"><span class="pre">MLSD</span></code> command
(<span class="target" id="index-3"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc3659.html"><strong>RFC 3659</strong></a>). If <em>path</em> is omitted the current directory is assumed.
<em>facts</em> is a list of strings representing the type of information desired
(e.g. <code class="docutils literal"><span class="pre">["type",</span> <span class="pre">"size",</span> <span class="pre">"perm"]</span></code>). Return a generator object yielding a
tuple of two elements for every file found in path. First element is the
file name, the second one is a dictionary containing facts about the file
name. Content of this dictionary might be limited by the <em>facts</em> argument
but server is not guaranteed to return all requested facts.</p>
<div class="versionadded">
<p><span class="versionmodified">New in version 3.3.</span></p>
</div>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.nlst">
<code class="descclassname">FTP.</code><code class="descname">nlst</code><span class="sig-paren">(</span><em>argument</em><span class="optional">[</span>, <em>...</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.nlst" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a list of file names as returned by the <code class="docutils literal"><span class="pre">NLST</span></code> command. The
optional <em>argument</em> is a directory to list (default is the current server
directory). Multiple arguments can be used to pass non-standard options to
the <code class="docutils literal"><span class="pre">NLST</span></code> command.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">If your server supports the command, <a class="reference internal" href="#ftplib.FTP.mlsd" title="ftplib.FTP.mlsd"><code class="xref py py-meth docutils literal"><span class="pre">mlsd()</span></code></a> offers a better API.</p>
</div>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.dir">
<code class="descclassname">FTP.</code><code class="descname">dir</code><span class="sig-paren">(</span><em>argument</em><span class="optional">[</span>, <em>...</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.dir" title="Permalink to this definition">¶</a></dt>
<dd><p>Produce a directory listing as returned by the <code class="docutils literal"><span class="pre">LIST</span></code> command, printing it to
standard output. The optional <em>argument</em> is a directory to list (default is the
current server directory). Multiple arguments can be used to pass non-standard
options to the <code class="docutils literal"><span class="pre">LIST</span></code> command. If the last argument is a function, it is used
as a <em>callback</em> function as for <a class="reference internal" href="#ftplib.FTP.retrlines" title="ftplib.FTP.retrlines"><code class="xref py py-meth docutils literal"><span class="pre">retrlines()</span></code></a>; the default prints to
<code class="docutils literal"><span class="pre">sys.stdout</span></code>. This method returns <code class="docutils literal"><span class="pre">None</span></code>.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">If your server supports the command, <a class="reference internal" href="#ftplib.FTP.mlsd" title="ftplib.FTP.mlsd"><code class="xref py py-meth docutils literal"><span class="pre">mlsd()</span></code></a> offers a better API.</p>
</div>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.rename">
<code class="descclassname">FTP.</code><code class="descname">rename</code><span class="sig-paren">(</span><em>fromname</em>, <em>toname</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.rename" title="Permalink to this definition">¶</a></dt>
<dd><p>Rename file <em>fromname</em> on the server to <em>toname</em>.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.delete">
<code class="descclassname">FTP.</code><code class="descname">delete</code><span class="sig-paren">(</span><em>filename</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.delete" title="Permalink to this definition">¶</a></dt>
<dd><p>Remove the file named <em>filename</em> from the server. If successful, returns the
text of the response, otherwise raises <a class="reference internal" href="#ftplib.error_perm" title="ftplib.error_perm"><code class="xref py py-exc docutils literal"><span class="pre">error_perm</span></code></a> on permission errors or
<a class="reference internal" href="#ftplib.error_reply" title="ftplib.error_reply"><code class="xref py py-exc docutils literal"><span class="pre">error_reply</span></code></a> on other errors.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.cwd">
<code class="descclassname">FTP.</code><code class="descname">cwd</code><span class="sig-paren">(</span><em>pathname</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.cwd" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the current directory on the server.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.mkd">
<code class="descclassname">FTP.</code><code class="descname">mkd</code><span class="sig-paren">(</span><em>pathname</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.mkd" title="Permalink to this definition">¶</a></dt>
<dd><p>Create a new directory on the server.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.pwd">
<code class="descclassname">FTP.</code><code class="descname">pwd</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.pwd" title="Permalink to this definition">¶</a></dt>
<dd><p>Return the pathname of the current directory on the server.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.rmd">
<code class="descclassname">FTP.</code><code class="descname">rmd</code><span class="sig-paren">(</span><em>dirname</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.rmd" title="Permalink to this definition">¶</a></dt>
<dd><p>Remove the directory named <em>dirname</em> on the server.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.size">
<code class="descclassname">FTP.</code><code class="descname">size</code><span class="sig-paren">(</span><em>filename</em><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.size" title="Permalink to this definition">¶</a></dt>
<dd><p>Request the size of the file named <em>filename</em> on the server. On success, the
size of the file is returned as an integer, otherwise <code class="docutils literal"><span class="pre">None</span></code> is returned.
Note that the <code class="docutils literal"><span class="pre">SIZE</span></code> command is not standardized, but is supported by many
common server implementations.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.quit">
<code class="descclassname">FTP.</code><code class="descname">quit</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.quit" title="Permalink to this definition">¶</a></dt>
<dd><p>Send a <code class="docutils literal"><span class="pre">QUIT</span></code> command to the server and close the connection. This is the
“polite” way to close a connection, but it may raise an exception if the server
responds with an error to the <code class="docutils literal"><span class="pre">QUIT</span></code> command. This implies a call to the
<a class="reference internal" href="#ftplib.FTP.close" title="ftplib.FTP.close"><code class="xref py py-meth docutils literal"><span class="pre">close()</span></code></a> method which renders the <a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a> instance useless for
subsequent calls (see below).</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP.close">
<code class="descclassname">FTP.</code><code class="descname">close</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP.close" title="Permalink to this definition">¶</a></dt>
<dd><p>Close the connection unilaterally. This should not be applied to an already
closed connection such as after a successful call to <a class="reference internal" href="#ftplib.FTP.quit" title="ftplib.FTP.quit"><code class="xref py py-meth docutils literal"><span class="pre">quit()</span></code></a>.
After this call the <a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a> instance should not be used any more (after
a call to <a class="reference internal" href="#ftplib.FTP.close" title="ftplib.FTP.close"><code class="xref py py-meth docutils literal"><span class="pre">close()</span></code></a> or <a class="reference internal" href="#ftplib.FTP.quit" title="ftplib.FTP.quit"><code class="xref py py-meth docutils literal"><span class="pre">quit()</span></code></a> you cannot reopen the
connection by issuing another <a class="reference internal" href="#ftplib.FTP.login" title="ftplib.FTP.login"><code class="xref py py-meth docutils literal"><span class="pre">login()</span></code></a> method).</p>
</dd></dl>
</div>
<div class="section" id="ftp-tls-objects">
<h2>21.13.2. FTP_TLS Objects<a class="headerlink" href="#ftp-tls-objects" title="Permalink to this headline">¶</a></h2>
<p><a class="reference internal" href="#ftplib.FTP_TLS" title="ftplib.FTP_TLS"><code class="xref py py-class docutils literal"><span class="pre">FTP_TLS</span></code></a> class inherits from <a class="reference internal" href="#ftplib.FTP" title="ftplib.FTP"><code class="xref py py-class docutils literal"><span class="pre">FTP</span></code></a>, defining these additional objects:</p>
<dl class="attribute">
<dt id="ftplib.FTP_TLS.ssl_version">
<code class="descclassname">FTP_TLS.</code><code class="descname">ssl_version</code><a class="headerlink" href="#ftplib.FTP_TLS.ssl_version" title="Permalink to this definition">¶</a></dt>
<dd><p>The SSL version to use (defaults to <a class="reference internal" href="ssl.html#ssl.PROTOCOL_SSLv23" title="ssl.PROTOCOL_SSLv23"><code class="xref py py-attr docutils literal"><span class="pre">ssl.PROTOCOL_SSLv23</span></code></a>).</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP_TLS.auth">
<code class="descclassname">FTP_TLS.</code><code class="descname">auth</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP_TLS.auth" title="Permalink to this definition">¶</a></dt>
<dd><p>Set up a secure control connection by using TLS or SSL, depending on what
is specified in the <a class="reference internal" href="#ftplib.FTP_TLS.ssl_version" title="ftplib.FTP_TLS.ssl_version"><code class="xref py py-attr docutils literal"><span class="pre">ssl_version</span></code></a> attribute.</p>
<div class="versionchanged">
<p><span class="versionmodified">Changed in version 3.4: </span>The method now supports hostname check with
<a class="reference internal" href="ssl.html#ssl.SSLContext.check_hostname" title="ssl.SSLContext.check_hostname"><code class="xref py py-attr docutils literal"><span class="pre">ssl.SSLContext.check_hostname</span></code></a> and <em>Server Name Indication</em> (see
<a class="reference internal" href="ssl.html#ssl.HAS_SNI" title="ssl.HAS_SNI"><code class="xref py py-data docutils literal"><span class="pre">ssl.HAS_SNI</span></code></a>).</p>
</div>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP_TLS.ccc">
<code class="descclassname">FTP_TLS.</code><code class="descname">ccc</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP_TLS.ccc" title="Permalink to this definition">¶</a></dt>
<dd><p>Revert control channel back to plaintext. This can be useful to take
advantage of firewalls that know how to handle NAT with non-secure FTP
without opening fixed ports.</p>
<div class="versionadded">
<p><span class="versionmodified">New in version 3.3.</span></p>
</div>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP_TLS.prot_p">
<code class="descclassname">FTP_TLS.</code><code class="descname">prot_p</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP_TLS.prot_p" title="Permalink to this definition">¶</a></dt>
<dd><p>Set up secure data connection.</p>
</dd></dl>
<dl class="method">
<dt id="ftplib.FTP_TLS.prot_c">
<code class="descclassname">FTP_TLS.</code><code class="descname">prot_c</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#ftplib.FTP_TLS.prot_c" title="Permalink to this definition">¶</a></dt>
<dd><p>Set up clear text data connection.</p>
</dd></dl>
</div>
</div>
</div>
</div>
</div>
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<h3><a href="../contents.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">21.13. <code class="docutils literal"><span class="pre">ftplib</span></code> — FTP protocol client</a><ul>
<li><a class="reference internal" href="#ftp-objects">21.13.1. FTP Objects</a></li>
<li><a class="reference internal" href="#ftp-tls-objects">21.13.2. FTP_TLS Objects</a></li>
</ul>
</li>
</ul>
<h4>Previous topic</h4>
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