diff -r dda33191f7f5 Doc/library/argparse.rst
--- a/Doc/library/argparse.rst	Sun Apr 10 12:59:16 2011 +0300
+++ b/Doc/library/argparse.rst	Sun Apr 10 18:16:29 2011 +0200
@@ -1371,7 +1371,10 @@
 Sub-commands
 ^^^^^^^^^^^^
 
-.. method:: ArgumentParser.add_subparsers()
+.. method:: ArgumentParser.add_subparsers([title], [description], [prog], \
+                                          [parser_class], [action], \
+                                          [option_string], [dest], [help], \
+                                          [metavar])
 
    Many programs split up their functionality into a number of sub-commands,
    for example, the ``svn`` program can invoke sub-commands like ``svn
@@ -1384,6 +1387,29 @@
    has a single method, ``add_parser``, which takes a command name and any
    :class:`ArgumentParser` constructor arguments, and returns an
    :class:`ArgumentParser` object that can be modified as usual.
+   
+   Description of parametres:
+   
+   * title - title for the sub-parser group in help output; by default
+     "subcommands" if description is provided, otherwise uses title for
+     positional arguments
+   
+   * description - description for the sub-parser group in help output, by
+     default None
+   
+   * prog - usage information that will be displayed with sub-command help,
+     by default name of the program
+   
+   * parser_class - class which will be used to create sub-parser instances, by
+     default it is the class of parent parser
+   
+   * dest - name of the attribute under which sub-command name will be 
+     stored; by default None and no value is stored
+   
+   * help - help for sub-parser group in help output, by default None
+   
+   * metavar - string presenting available sub-commands in help; by default it
+     is None and presents sub-commands in form {cmd1, cmd2, ..}
 
    Some example usage::