numpy.core.defchararray.multiply
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numpy.core.defchararray.multiply(a, i)[source]
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Return (a * i), that is string multiple concatenation, element-wise. Values in iof less than 0 are treated as 0 (which yields an empty string).Parameters: a : array_like of str or unicode i : array_like of ints Returns: out : ndarray Output array of str or unicode, depending on input types 
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    https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.core.defchararray.multiply.html