pandas.pydata.org › pandas-docs › stableIO tools (text, CSV, HDF5, …) — pandas 1.5.1 documentation List of column names to use. If file contains no header row, then you should explicitly pass header=None. Duplicates in this list are not allowed. index_col int, str, sequence of int / str, or False, optional, default None. Column(s) to use as the row labels of the DataFrame, either given as string name or column index. If a sequence of int ...