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gh-126946: Improve error message in getopt.do_longs based on existing comment (GH-126871)

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Include a list of possibilities for not unique prefix.
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Beomsoo Kim 2024-11-26 17:54:02 +09:00 • committed by GitHub
parent 733fe59206
commit f46d847574
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3 changed files with 10 additions and 5 deletions
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10
Lib/getopt.py
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@ -185,11 +185,13 @@ def long_has_args(opt, longopts):
return True, opt
elif opt + '=?' in possibilities:
return '?', opt
# No exact match, so better be unique.
# Possibilities must be unique to be accepted
if len(possibilities) > 1:
# XXX since possibilities contains all valid continuations, might be
# nice to work them into the error msg
raise GetoptError(_('option --%s not a unique prefix') % opt, opt)
raise GetoptError(
_("option --%s not a unique prefix; possible options: %s")
% (opt, ", ".join(possibilities)),
opt,
)
assert len(possibilities) == 1
unique_match = possibilities[0]
if unique_match.endswith('=?'):