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author | Dong-hee Na <donghee.na92@gmail.com> | 2018-07-10 07:26:36 (GMT) |
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committer | INADA Naoki <methane@users.noreply.github.com> | 2018-07-10 07:26:36 (GMT) |
commit | 445f1b35ce8461268438c8a6b327ddc764287e05 (patch) | |
tree | 7946f28321ff39563a8200ed7705a600f7ab521a /Lib/functools.py | |
parent | 7762e4d3872818272800dfbd8e1d8e3a689eb8f2 (diff) | |
download | cpython-445f1b35ce8461268438c8a6b327ddc764287e05.zip cpython-445f1b35ce8461268438c8a6b327ddc764287e05.tar.gz cpython-445f1b35ce8461268438c8a6b327ddc764287e05.tar.bz2 |
bpo-33967: Fix singledispatch raised IndexError when no args (GH-8184)
Diffstat (limited to 'Lib/functools.py')
-rw-r--r-- | Lib/functools.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/functools.py b/Lib/functools.py index d5f4393..b3428a4 100644 --- a/Lib/functools.py +++ b/Lib/functools.py @@ -817,8 +817,13 @@ def singledispatch(func): return func def wrapper(*args, **kw): + if not args: + raise TypeError(f'{funcname} requires at least ' + '1 positional argument') + return dispatch(args[0].__class__)(*args, **kw) + funcname = getattr(func, '__name__', 'singledispatch function') registry[object] = func wrapper.register = register wrapper.dispatch = dispatch |