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| author | Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> | 2020-05-26 05:00:31 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-05-26 05:00:31 (GMT) |
| commit | a729f4abb8a3b13b63d46c450faf64202751449b (patch) | |
| tree | 29e1becea242e860cd8ffd5c6f455ebf6f504d22 /Lib | |
| parent | fda47659bbc27097abb6e3b8a380bff13a753eb0 (diff) | |
| download | cpython-a729f4abb8a3b13b63d46c450faf64202751449b.zip cpython-a729f4abb8a3b13b63d46c450faf64202751449b.tar.gz cpython-a729f4abb8a3b13b63d46c450faf64202751449b.tar.bz2 | |
Simplify creation of the __new__ method in namedtuple() (GH-20361) (GH-20409)
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/collections/__init__.py | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/Lib/collections/__init__.py b/Lib/collections/__init__.py index c4bff59..011a0c1 100644 --- a/Lib/collections/__init__.py +++ b/Lib/collections/__init__.py @@ -406,11 +406,9 @@ def namedtuple(typename, field_names, *, rename=False, defaults=None, module=Non # Create all the named tuple methods to be added to the class namespace - s = f'def __new__(_cls, {arg_list}): return _tuple_new(_cls, ({arg_list}))' + s = f'lambda _cls, {arg_list}: _tuple_new(_cls, ({arg_list}))' namespace = {'_tuple_new': tuple_new, '__name__': f'namedtuple_{typename}'} - # Note: exec() has the side-effect of interning the field names - exec(s, namespace) - __new__ = namespace['__new__'] + __new__ = eval(s, namespace) __new__.__doc__ = f'Create new instance of {typename}({arg_list})' if defaults is not None: __new__.__defaults__ = defaults |