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10 changes: 10 additions & 0 deletions Doc/library/stdtypes.rst
Original file line number Diff line number Diff line change
Expand Up @@ -1779,6 +1779,16 @@ expression support in the :mod:`re` module).
Return true if all cased characters [4]_ in the string are uppercase and
there is at least one cased character, false otherwise.

>>> 'BANANA'.isupper()
True
>>> 'banana'.isupper()
False
>>> 'baNana'.isupper()
False
>>> ' '.isupper()
False



.. method:: str.join(iterable)

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