numpy.char.isalnum

numpy.char.isalnum(a)

Returns true for each element if all characters in the string are alphanumeric and there is at least one character, false otherwise.

Calls str.isalnum element-wise.

For 8-bit strings, this method is locale-dependent.

Parameters
aarray_like of str or unicode
Returns
outndarray

Output array of str or unicode, depending on input type

See also

str.isalnum

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https://numpy.org/doc/1.19/reference/generated/numpy.char.isalnum.html