Merged revisions 83675 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r83675 | r.david.murray | 2010-08-03 13:56:09 -0400 (Tue, 03 Aug 2010) | 12 lines
#9444: use first of prefix_chars for help opt instead of raising error
An argparse option parser created with a prefix_chars that did not
include a '-' would happily add -h and --help options, and then throw
an error when it tried to format the help because the - was an invalid
prefix character. This patch makes it use the first character of
prefix_chars as the character for the help options if and only if '-'
is not one of the valid prefix_chars.
Fix by Theodore Turocy, unit tests by Catherine Devlin.
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diff --git a/Misc/NEWS b/Misc/NEWS
index 323b0a3..431c3d5 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -24,6 +24,10 @@
Library
-------
+- Issue #9444: Argparse now uses the first element of prefix_chars as
+ the option character for the added 'h/help' option if prefix_chars
+ does not contain a '-', instead of raising an error.
+
- Issue #9354: Provide getsockopt() in asyncore's file_wrapper.
- Issue #7781: Fix restricting stats by entry counts in the pstats