pandas to_datetime 时间转换时间戳保留北京时间日期

	```
	    user_id  create_time
0     38441   1541001602
1     38442   1541001664
2     38443   1541001744
3     38444   1541001926
4     38445   1541002012
5     38446   1541002413
6     38447   1541002444
7     38448   1541002530
8     38449   1541002593

	```
转换成北京时间日期
userdf['date']= pd.to_datetime(userdf['create_time'].values, utc=True, unit='s').tz_convert(
            "Asia/Shanghai").to_period("D")
   user_id  create_time       date
0    38441   1541001602 2018-11-01
1    38442   1541001664 2018-11-01
2    38443   1541001744 2018-11-01
3    38444   1541001926 2018-11-01
4    38445   1541002012 2018-11-01
5    38446   1541002413 2018-11-01
6    38447   1541002444 2018-11-01
7    38448   1541002530 2018-11-01
8    38449   1541002593 2018-11-01
9    38450   1541002769 2018-11-01

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转载自blog.csdn.net/weixin_40161254/article/details/88550328
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