Deprecate ArgumentParser(..., version=XXX, ...) as well as format_version() and print_version(). These should be replaced with .add_argument(..., action='version', ...).

9 files changed, 43 insertions, 48 deletions

diff --git a/NEWS.txt b/NEWS.txt
index 3c2b716..c4859b5 100644
--- a/NEWS.txt
+++ b/NEWS.txt
@@ -7,6 +7,7 @@ What's New in argparse 1.1
 - Issue #37: Stop treating two character alphanumeric flags as numbers.
 - Issue #38: Better error messages when 'dest' occurs twice for positional arguments.
 - Issue #39: Better error messages for invalid actions.
+- Issue #43: Deprecate ArgumentParser(..., version=XXX, ...) and friends.
 - Namespace objects now support "in" (i.e. __contains__).
 - Usage and help (but not version) messages are written to stdout, not stderr.
 
diff --git a/argparse.py b/argparse.py
index 83844d7..fd21104 100644
--- a/argparse.py
+++ b/argparse.py
@@ -1543,7 +1543,6 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
         - usage -- A usage message (default: auto-generated from arguments)
         - description -- A description of what the program does
         - epilog -- Text following the argument descriptions
-        - version -- Add a -v/--version option with the given version string
         - parents -- Parsers whose arguments should be copied into this one
         - formatter_class -- HelpFormatter class for printing help messages
         - prefix_chars -- Characters that prefix optional arguments
@@ -1568,6 +1567,14 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
                  conflict_handler='error',
                  add_help=True):
 
+        if version is not None:
+            import warnings
+            warnings.warn(
+                """The "version" argument to ArgumentParser is deprecated. """
+                """Please use """
+                """"add_argument(..., action='version', version="N", ...)" """
+                """instead""", DeprecationWarning)
+
         superinit = super(ArgumentParser, self).__init__
         superinit(description=description,
                   prefix_chars=prefix_chars,
@@ -2286,6 +2293,11 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
         return formatter.format_help()
 
     def format_version(self):
+        import warnings
+        warnings.warn(
+            'The format_version method is deprecated -- the "version" '
+            'argument to ArgumentParser is no longer supported.',
+            DeprecationWarning)
         formatter = self._get_formatter()
         formatter.add_text(self.version)
         return formatter.format_help()
@@ -2307,6 +2319,11 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
         self._print_message(self.format_help(), file)
 
     def print_version(self, file=None):
+        import warnings
+        warnings.warn(
+            'The print_version method is deprecated -- the "version" '
+            'argument to ArgumentParser is no longer supported.',
+            DeprecationWarning)
         self._print_message(self.format_version(), file)
 
     def _print_message(self, message, file=None):
diff --git a/doc/ArgumentParser.html b/doc/ArgumentParser.html
index fc8df9d..f7e37ee 100644
--- a/doc/ArgumentParser.html
+++ b/doc/ArgumentParser.html
@@ -52,12 +52,11 @@
 <dl class="class">
 <dt id="ArgumentParser">
 <em class="property">
-class </em><tt class="descname">ArgumentParser</tt><big>(</big><span class="optional">[</span><em>description</em><span class="optional">]</span><span class="optional">[</span>, <em>epilog</em><span class="optional">]</span><span class="optional">[</span>, <em>prog</em><span class="optional">]</span><span class="optional">[</span>, <em>usage</em><span class="optional">]</span><span class="optional">[</span>, <em>version</em><span class="optional">]</span><span class="optional">[</span>, <em>add_help</em><span class="optional">]</span><span class="optional">[</span>, <em>argument_default</em><span class="optional">]</span><span class="optional">[</span>, <em>parents</em><span class="optional">]</span><span class="optional">[</span>, <em>prefix_chars</em><span class="optional">]</span><span class="optional">[</span>, <em>conflict_handler</em><span class="optional">]</span><span class="optional">[</span>, <em>formatter_class</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#ArgumentParser" title="Permalink to this definition">¶</a></dt>
+class </em><tt class="descname">ArgumentParser</tt><big>(</big><span class="optional">[</span><em>description</em><span class="optional">]</span><span class="optional">[</span>, <em>epilog</em><span class="optional">]</span><span class="optional">[</span>, <em>prog</em><span class="optional">]</span><span class="optional">[</span>, <em>usage</em><span class="optional">]</span><span class="optional">[</span>, <em>add_help</em><span class="optional">]</span><span class="optional">[</span>, <em>argument_default</em><span class="optional">]</span><span class="optional">[</span>, <em>parents</em><span class="optional">]</span><span class="optional">[</span>, <em>prefix_chars</em><span class="optional">]</span><span class="optional">[</span>, <em>conflict_handler</em><span class="optional">]</span><span class="optional">[</span>, <em>formatter_class</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#ArgumentParser" title="Permalink to this definition">¶</a></dt>
 <dd><p>Create a new <a title="ArgumentParser" class="reference internal" href="#ArgumentParser"><tt class="xref docutils literal"><span class="pre">ArgumentParser</span></tt></a> object. Each parameter has its own more detailed description below, but in short they are:</p>
 <ul class="simple">
 <li><a class="reference internal" href="#description">description</a> - Text to display before the argument help.</li>
 <li><a class="reference internal" href="#epilog">epilog</a> - Text to display after the argument help.</li>
-<li><a class="reference internal" href="#version">version</a> - A version number used to add a -v/&#8211;version option to the parser.</li>
 <li><a class="reference internal" href="#add-help">add_help</a> - Add a -h/&#8211;help option to the parser. (default: True)</li>
 <li><a class="reference internal" href="#argument-default">argument_default</a> - Set the global default value for arguments. (default: None)</li>
 <li><a class="reference internal" href="#parents">parents</a> - A list of :class:ArgumentParser objects whose arguments should also be included.</li>
@@ -105,22 +104,6 @@ class </em><tt class="descname">ArgumentParser</tt><big>(</big><span class="opti
 </div>
 <p>As with the <a class="reference internal" href="#description">description</a> argument, the <tt class="docutils literal"><span class="pre">epilog=</span></tt> text is by default line-wrapped, but this behavior can be adjusted with the <a class="reference internal" href="#formatter-class">formatter_class</a> argument to ArgumentParser.</p>
 </div>
-<div class="section" id="version">
-<h2>version<a class="headerlink" href="#version" title="Permalink to this headline">¶</a></h2>
-<p>Programs which want to display the program version at the command line can supply a version message as the <tt class="docutils literal"><span class="pre">version=</span></tt> argument to ArgumentParser. This will add a <tt class="docutils literal"><span class="pre">-v/--version</span></tt> option to the ArgumentParser that can be invoked to print the version string:</p>
-<div class="highlight-python"><div class="highlight"><pre><span class="gp">&gt;&gt;&gt; </span><span class="n">parser</span> <span class="o">=</span> <span class="n">argparse</span><span class="o">.</span><span class="n">ArgumentParser</span><span class="p">(</span><span class="n">prog</span><span class="o">=</span><span class="s">&#39;PROG&#39;</span><span class="p">,</span> <span class="n">version</span><span class="o">=</span><span class="s">&#39;</span><span class="si">%(prog)s</span><span class="s"> 3.5&#39;</span><span class="p">)</span>
-<span class="gp">&gt;&gt;&gt; </span><span class="n">parser</span><span class="o">.</span><span class="n">print_help</span><span class="p">()</span>
-<span class="go">usage: PROG [-h] [-v]</span>
-
-<span class="go">optional arguments:</span>
-<span class="go">  -h, --help     show this help message and exit</span>
-<span class="go">  -v, --version  show program&#39;s version number and exit</span>
-<span class="gp">&gt;&gt;&gt; </span><span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">([</span><span class="s">&#39;-v&#39;</span><span class="p">])</span>
-<span class="go">PROG 3.5</span>
-</pre></div>
-</div>
-<p>Note you can use the <tt class="docutils literal"><span class="pre">%(prog)s</span></tt> format specifier to insert the program name into the version string. For greater customization, see the documentation on the <tt class="docutils literal"><span class="pre">'version'</span></tt> action available for <a title="add_argument" class="reference external" href="add_argument.html#add_argument"><tt class="xref docutils literal"><span class="pre">add_argument()</span></tt></a>.</p>
-</div>
 <div class="section" id="add-help">
 <h2>add_help<a class="headerlink" href="#add-help" title="Permalink to this headline">¶</a></h2>
 <p>By default, ArgumentParser objects add a <tt class="docutils literal"><span class="pre">-h/--help</span></tt> option which simply displays the parser&#8217;s help message. For example, consider a file named <tt class="docutils literal"><span class="pre">myprogram.py</span></tt> containing the following code:</p>
@@ -396,7 +379,6 @@ optional arguments:
 <li><a class="reference external" href="">ArgumentParser objects</a><ul>
 <li><a class="reference external" href="#description">description</a></li>
 <li><a class="reference external" href="#epilog">epilog</a></li>
-<li><a class="reference external" href="#version">version</a></li>
 <li><a class="reference external" href="#add-help">add_help</a></li>
 <li><a class="reference external" href="#prefix-chars">prefix_chars</a></li>
 <li><a class="reference external" href="#fromfile-prefix-chars">fromfile_prefix_chars</a></li>
diff --git a/doc/add_argument.html b/doc/add_argument.html
index 1d34a65..38e8954 100644
--- a/doc/add_argument.html
+++ b/doc/add_argument.html
@@ -139,11 +139,11 @@
 </pre></div>
 </div>
 </li>
-<li><p class="first"><tt class="docutils literal"><span class="pre">'version'</span></tt> - This expects a <tt class="docutils literal"><span class="pre">version=</span></tt> keyword argument in the <a title="add_argument" class="reference internal" href="#add_argument"><tt class="xref docutils literal"><span class="pre">add_argument()</span></tt></a> call, and prints version information and exits when invoked. This can be used when the default <a title="ArgumentParser" class="reference external" href="ArgumentParser.html#ArgumentParser"><tt class="xref docutils literal"><span class="pre">ArgumentParser</span></tt></a> version flags <tt class="docutils literal"><span class="pre">-v,</span> <span class="pre">--version</span></tt> are not appropriate for your program.</p>
+<li><p class="first"><tt class="docutils literal"><span class="pre">'version'</span></tt> - This expects a <tt class="docutils literal"><span class="pre">version=</span></tt> keyword argument in the <a title="add_argument" class="reference internal" href="#add_argument"><tt class="xref docutils literal"><span class="pre">add_argument()</span></tt></a> call, and prints version information and exits when invoked.</p>
 <div class="highlight-python"><div class="highlight"><pre><span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">argparse</span>
 <span class="gp">&gt;&gt;&gt; </span><span class="n">parser</span> <span class="o">=</span> <span class="n">argparse</span><span class="o">.</span><span class="n">ArgumentParser</span><span class="p">(</span><span class="n">prog</span><span class="o">=</span><span class="s">&#39;PROG&#39;</span><span class="p">)</span>
-<span class="gp">&gt;&gt;&gt; </span><span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s">&#39;-V&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s">&#39;version&#39;</span><span class="p">,</span> <span class="n">version</span><span class="o">=</span><span class="s">&#39;</span><span class="si">%(prog)s</span><span class="s"> 2.0&#39;</span><span class="p">)</span>
-<span class="gp">&gt;&gt;&gt; </span><span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">([</span><span class="s">&#39;-V&#39;</span><span class="p">])</span>
+<span class="gp">&gt;&gt;&gt; </span><span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s">&#39;-v&#39;</span><span class="p">,</span> <span class="s">&#39;--version&#39;</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s">&#39;version&#39;</span><span class="p">,</span> <span class="n">version</span><span class="o">=</span><span class="s">&#39;</span><span class="si">%(prog)s</span><span class="s"> 2.0&#39;</span><span class="p">)</span>
+<span class="gp">&gt;&gt;&gt; </span><span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">([</span><span class="s">&#39;-v&#39;</span><span class="p">])</span>
 <span class="go">PROG 2.0</span>
 </pre></div>
 </div>
diff --git a/doc/api-docs.html b/doc/api-docs.html
index eadfbe0..e257716 100644
--- a/doc/api-docs.html
+++ b/doc/api-docs.html
@@ -51,7 +51,6 @@
 <li class="toctree-l1"><a class="reference external" href="ArgumentParser.html">ArgumentParser objects</a><ul>
 <li class="toctree-l2"><a class="reference external" href="ArgumentParser.html#description">description</a></li>
 <li class="toctree-l2"><a class="reference external" href="ArgumentParser.html#epilog">epilog</a></li>
-<li class="toctree-l2"><a class="reference external" href="ArgumentParser.html#version">version</a></li>
 <li class="toctree-l2"><a class="reference external" href="ArgumentParser.html#add-help">add_help</a></li>
 <li class="toctree-l2"><a class="reference external" href="ArgumentParser.html#prefix-chars">prefix_chars</a></li>
 <li class="toctree-l2"><a class="reference external" href="ArgumentParser.html#fromfile-prefix-chars">fromfile_prefix_chars</a></li>
diff --git a/doc/searchindex.js b/doc/searchindex.js
index 3a561be..080fc79 100644
--- a/doc/searchindex.js
+++ b/doc/searchindex.js
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/doc/source/ArgumentParser.rst b/doc/source/ArgumentParser.rst
index f50ab5d..58f37cc 100644
--- a/doc/source/ArgumentParser.rst
+++ b/doc/source/ArgumentParser.rst
@@ -1,13 +1,12 @@
 ArgumentParser objects
 ======================
 
-.. class:: ArgumentParser([description], [epilog], [prog], [usage], [version], [add_help], [argument_default], [parents], [prefix_chars], [conflict_handler], [formatter_class])
+.. class:: ArgumentParser([description], [epilog], [prog], [usage], [add_help], [argument_default], [parents], [prefix_chars], [conflict_handler], [formatter_class])
 
    Create a new :class:`ArgumentParser` object. Each parameter has its own more detailed description below, but in short they are:
    
    * description_ - Text to display before the argument help.
    * epilog_ - Text to display after the argument help.
-   * version_ - A version number used to add a -v/--version option to the parser.
    * add_help_ - Add a -h/--help option to the parser. (default: True)
    * argument_default_ - Set the global default value for arguments. (default: None)
    * parents_ - A list of :class:ArgumentParser objects whose arguments should also be included.
@@ -59,24 +58,6 @@ Some programs like to display additional description of the program after the de
 As with the description_ argument, the ``epilog=`` text is by default line-wrapped, but this behavior can be adjusted with the formatter_class_ argument to ArgumentParser.
 
 
-version
--------
-
-Programs which want to display the program version at the command line can supply a version message as the ``version=`` argument to ArgumentParser. This will add a ``-v/--version`` option to the ArgumentParser that can be invoked to print the version string::
-
-  >>> parser = argparse.ArgumentParser(prog='PROG', version='%(prog)s 3.5')
-  >>> parser.print_help()
-  usage: PROG [-h] [-v]
-  
-  optional arguments:
-    -h, --help     show this help message and exit
-    -v, --version  show program's version number and exit
-  >>> parser.parse_args(['-v'])
-  PROG 3.5
-
-Note you can use the ``%(prog)s`` format specifier to insert the program name into the version string. For greater customization, see the documentation on the ``'version'`` action available for :meth:`add_argument`.
-
-
 add_help
 --------
 
diff --git a/doc/source/add_argument.rst b/doc/source/add_argument.rst
index e72df5b..374d742 100644
--- a/doc/source/add_argument.rst
+++ b/doc/source/add_argument.rst
@@ -85,12 +85,12 @@ action
     >>> parser.parse_args('--str --int'.split())
     Namespace(types=[<type 'str'>, <type 'int'>])
 
-* ``'version'`` - This expects a ``version=`` keyword argument in the :meth:`add_argument` call, and prints version information and exits when invoked. This can be used when the default :class:`ArgumentParser` version flags ``-v, --version`` are not appropriate for your program.
+* ``'version'`` - This expects a ``version=`` keyword argument in the :meth:`add_argument` call, and prints version information and exits when invoked.
 
     >>> import argparse
     >>> parser = argparse.ArgumentParser(prog='PROG')
-    >>> parser.add_argument('-V', action='version', version='%(prog)s 2.0')
-    >>> parser.parse_args(['-V'])
+    >>> parser.add_argument('-v', '--version', action='version', version='%(prog)s 2.0')
+    >>> parser.parse_args(['-v'])
     PROG 2.0
 
 You can also specify an arbitrary action by passing an object that implements the Action API.  The easiest way to do this is to extend ``argparse.Action``, supplying an appropriate ``__call__`` method.  The ``__call__`` method accepts four parameters:
diff --git a/test/test_argparse.py b/test/test_argparse.py
index f9e0f24..290b5e9 100644
--- a/test/test_argparse.py
+++ b/test/test_argparse.py
@@ -52,6 +52,21 @@ if sys.version_info[:2] == (2, 6):
         message='BaseException.message has been deprecated as of Python 2.6',
         category=DeprecationWarning)
 
+# silence warnings about version argument - these are expected
+import warnings
+warnings.filterwarnings(
+    action='ignore',
+    message='The "version" argument to ArgumentParser is deprecated.',
+    category=DeprecationWarning)
+warnings.filterwarnings(
+    action='ignore',
+    message='The format_version method is deprecated',
+    category=DeprecationWarning)
+warnings.filterwarnings(
+    action='ignore',
+    message='The print_version method is deprecated',
+    category=DeprecationWarning)
+
 
 class TestCase(unittest.TestCase):