numpy.char.chararray.isnumeric
method
- 
chararray.isnumeric(self) - 
For each element in
self, return True if there are only numeric characters in the element.See also
char.isnumeric 
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Licensed under the 3-clause BSD License.
    https://numpy.org/doc/1.19/reference/generated/numpy.char.chararray.isnumeric.html