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Add docstring to new varargs callback ui function

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Pedro Silva 2013-10-22 21:46:46 +02:00
parent 7299ed24c6
commit 48b963a66e
1 changed files with 12 additions and 4 deletions
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16
beets/ui/__init__.py
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@ -695,11 +695,19 @@ class SubcommandsOptionParser(optparse.OptionParser):
return options, subcommand, suboptions, subargs
# callback for an option with variable arguments
# parser.add_option("-c", "--callback", dest="vararg_attr",
# action="callback", callback=vararg_callback)
def vararg_callback(option, opt_str, value, parser):
"""Callback for an option with variable arguments.
Manually collect arguments right of a callback-action
option (ie. with action="callback"), and add the resulting
list to the destination var.
Usage:
parser.add_option("-c", "--callback", dest="vararg_attr",
action="callback", callback=vararg_callback)
Details:
http://docs.python.org/2/library/optparse.html#callback-example-6-variable-arguments
"""
assert value is None
value = []