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Python机器学习手册:从数据预处理到深度学习
book

Python机器学习手册:从数据预处理到深度学习

by Chris Albon
July 2019
Intermediate to advanced
365 pages
8h 13m
Chinese
Publishing House of Electronics Industry
Content preview from Python机器学习手册:从数据预处理到深度学习
7.2
 处理时区
115
7.2
 处理时区
问题描述
为一组时间序列数据添加或改变时区。
解决方案
如果没有特别指定,
pandas
的对象都是没有时区的,不过可以在创建对象时通过
tz
数来指定时区
#
加载库
import pandas as pd
#
创建
datetime
pd.Timestamp('2017-05-01 06:00:00', tz='Europe/London')
Timestamp('2017-05-01 06:00:00+0100', tz='Europe/London')
可以用
tz_localize
为之前创建的
datetime
对象添加时区信息
#
创建
datetime
date = pd.Timestamp('2017-05-01 06:00:00')
#
设置时区
date_in_london = date.tz_localize('Europe/London')
#
查看
datetime
date_in_london
Timestamp('2017-05-01 06:00:00+0100', tz='Europe/London')
还可以转换时区
#
改变时区
date_in_london.tz_convert('Africa/Abidjan')
Timestamp('2017-05-01 05:00:00+0000', tz='Africa/Abidjan')
最后,
pandas
Series
对象能对每一个元素应用
tz_localize
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Publisher Resources

ISBN: 9787121369629