python UTC 与 本地时间互转

from datetime import datetime

def utc2local( utc_dtm ):
    # UTC 时间转本地时间（ +8:00 ）
    local_tm = datetime.fromtimestamp( 0 )
    utc_tm = datetime.utcfromtimestamp( 0 )
    offset = local_tm - utc_tm
    return utc_dtm + offset

def local2utc( local_dtm ):
    # 本地时间转 UTC 时间（ -8:00 ）
    return datetime.utcfromtimestamp( local_dtm.timestamp() )

if __name__ == "__main__":

    # utc_tm = datetime.utcnow()
    utc_tm = datetime( 2012, 10, 26, 10, 00, 00 )

    print( "src utc time:\t", utc_tm.strftime("%Y-%m-%d %H:%M:%S") ) 

    # UTC 转本地
    local_tm = utc2local(utc_tm)
    print( "tran loc time:\t", local_tm.strftime("%Y-%m-%d %H:%M:%S") ) 

    # 本地转 UTC
    utc_tran = local2utc(local_tm)
    print( "tran utc time:\t", utc_tran.strftime("%Y-%m-%d %H:%M:%S") )