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numpy.char.replace

numpy.char.replace(a, old, new, count=None)

For each element in a, return a copy of the string with all occurrences of substring old replaced by new.

Calls str.replace element-wise.

Parameters:
a : array-like of str or unicode
old, new : str or unicode
count : int, optional

If the optional argument count is given, only the first count occurrences are replaced.

Returns:
out : ndarray

Output array of str or unicode, depending on input type

See also

str.replace

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https://docs.scipy.org/doc/numpy-1.17.0/reference/generated/numpy.char.replace.html