pandas.Series.str.join
Series.str.join(sep)[source]-
Join lists contained as elements in the Series/Index with passed delimiter. Equivalent to
str.join().Parameters: sep : string
Delimiter
Returns: joined : Series/Index of objects
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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.19.2/generated/pandas.Series.str.join.html