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Provide ExtensionDtype.construct_from_string by default #26562

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Jun 6, 2019
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5 changes: 4 additions & 1 deletion pandas/core/dtypes/base.py
Original file line number Diff line number Diff line change
Expand Up @@ -202,7 +202,10 @@ def construct_from_string(cls, string):
... raise TypeError("Cannot construct a '{}' from "
... "'{}'".format(cls, string))
"""
raise AbstractMethodError(cls)
if string != cls.name:
raise TypeError("Cannot construct a '{}' from '{}'".format(
cls.__name__, string))
return cls()

@classmethod
def is_dtype(cls, dtype):
Expand Down