old content: https://github.com/PhilipMay/eniak/blob/master/py/pandas.rst

data = {'col1': [1, 2], 'col2': [3, 4]}
df = pd.DataFrame(data=data)

df.to_csv(<path_or_buffer>)

Without row names (index):

df.to_csv(<path_or_buffer>, index=False)

df = pd.read_csv(
        <path_or_buffer>,
        sep=';',
        encoding='us-ascii',
        usecols=<col_list>,
        nrows=<number_of_rows_to_read>,
        )