DataFrame.join()
pandas.DataFrame.join
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DataFrame.join(other, on=None, how='left', lsuffix='', rsuffix='', sort=False) -
Join columns with other DataFrame either on index or on a key column. Efficiently Join multiple DataFrame objects by index at once by passing a list.
Parameters: other : DataFrame, Series with name field set, or list of DataFrame
Index should be similar to one of the columns in this one. If a Series is passed, its name attribute must be set, and that will be used as the column name in the resulting joined DataFrame
on : column name, tuple/list of column names, or array-like
Column(s) to use for joining, ot