numpy.char.join

char.join(sep, seq) [source]

Return a string which is the concatenation of the strings in the sequence seq.

Calls str.join element-wise.

Parameters
separray_like of str or unicode
seqarray_like of str or unicode
Returns
outndarray

Output array of str or unicode, depending on input types

See also

str.join

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https://numpy.org/doc/1.20/reference/generated/numpy.char.join.html