numpy.core.defchararray.chararray.isalnum
-
chararray.isalnum()[source] -
Returns true for each element if all characters in the string are alphanumeric and there is at least one character, false otherwise.
See also
char.isalnum
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https://docs.scipy.org/doc/numpy-1.15.4/reference/generated/numpy.core.defchararray.chararray.isalnum.html