How to look up historical time zones by date and location

[luofeiyu]

My dear  friends here, all i want is get   ` LMT+8:06:00`  from the 
output of tz1  `<DstTzInfo 'Asia/Shanghai' LMT+8:06:00 STD>`

Shall we get back to the main point?

If you are interested in it ,please say yes or no ,and how to do that ?


import pytz,datetime
tz1 = pytz.timezone('Asia/Shanghai')
tz1
<DstTzInfo 'Asia/Shanghai' LMT+8:06:00 STD>
 >>> str(tz1)
'Asia/Shanghai'