numpy.char.multiply

numpy.char.multiply(a, i)

Return (a * i), that is string multiple concatenation, element-wise.

Values in i of less than 0 are treated as 0 (which yields an empty string).

Parameters
aarray_like of str or unicode
iarray_like of ints
Returns
outndarray

Output array of str or unicode, depending on input types

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