pandas.Series.str.repeat
Series.str.repeat(repeats)-
Duplicate each string in the Series/Index by indicated number of times.
Parameters: repeats : int or array
Same value for all (int) or different value per (array)
Returns: repeated : Series/Index of objects
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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.18.1/generated/pandas.Series.str.repeat.html