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authorDong-hee Na <donghee.na92@gmail.com>2018-07-10 07:26:36 (GMT)
committerINADA Naoki <methane@users.noreply.github.com>2018-07-10 07:26:36 (GMT)
commit445f1b35ce8461268438c8a6b327ddc764287e05 (patch)
tree7946f28321ff39563a8200ed7705a600f7ab521a /Lib/functools.py
parent7762e4d3872818272800dfbd8e1d8e3a689eb8f2 (diff)
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bpo-33967: Fix singledispatch raised IndexError when no args (GH-8184)
Diffstat (limited to 'Lib/functools.py')
-rw-r--r--Lib/functools.py5
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