EST time versus Beijing time about efinance HOT 2 CLOSED

from datetime import datetime, timedelta
import efinance as ef


def time_convert(date: str, hours: int, time_format: str = None) -> str:
    """


    Parameters
    ----------
    date : str
        date to be converted
    hours : int
        hours = (dest_time - src_time).hours
    time_format : str, optional
        date format

    Returns
    -------
    str

    Examples
    --------
    >>> date = '2021-01-01 08:00' # Beijing Time 
    >>> date_est = time_convert(date,-13)
    >>> date_est # EST
    '2020-12-31 19:00'

    """    
    if time_format is None:
        formats = [
            '%Y-%m-%d %H:%M:%S',
            '%Y/%m/%d %H:%M:%S',
            '%Y-%m-%d %H:%M',
            '%Y/%m/%d %H:%M',
            '%Y-%m-%d',
            '%Y/%m/%d']
        for idx, format in enumerate(formats):
            try:
                datetime.strptime(date, format)
                time_format = format
                break
            except Exception as e:
                if idx == len(formats)-1:
                    raise e
    return (datetime.strptime(
        date, time_format)+timedelta(hours=hours)).strftime(time_format)


df = ef.stock.get_quote_history('MSFT', klt=5)
# hours = (dest_time - src_time).hours
# Beijing => UTC + 8
# EST => UTC - 5
# so (EST - Beijing).hours = -13
hours = -13
df['日期'] = df['日期'].apply(lambda x: time_convert(x, hours))
# print(df['日期'])