转换时区pandas数据帧

时间:2014-04-02 01:50:11

标签: python pandas

我有数据:

                             Symbol      bid      ask
Timestamp                                            
2014-01-01 21:55:34.378000  EUR/USD  1.37622  1.37693
2014-01-01 21:55:40.410000  EUR/USD  1.37624  1.37698
2014-01-01 21:55:47.210000  EUR/USD  1.37619  1.37696
2014-01-01 21:55:57.963000  EUR/USD  1.37616  1.37696
2014-01-01 21:56:03.117000  EUR/USD  1.37616  1.37694

时间戳是GMT。有没有办法将其转换为东方?

当我这样做时注意:

data.index

我得到输出:

<class 'pandas.tseries.index.DatetimeIndex'>
[2014-01-01 21:55:34.378000, ..., 2014-01-01 21:56:03.117000]
Length: 5, Freq: None, Timezone: None

3 个答案:

答案 0 :(得分:26)

将索引(使用tz_localize)本地化为UTC(以使时间戳识别时区),然后转换为东方(使用tz_convert):

import pytz
eastern = pytz.timezone('US/Eastern')
df.index = index.tz_localize(pytz.utc).tz_convert(eastern)

例如:

import pandas as pd
import pytz

index = pd.date_range('20140101 21:55', freq='15S', periods=5)
df = pd.DataFrame(1, index=index, columns=['X'])
print(df)
#                      X
# 2014-01-01 21:55:00  1
# 2014-01-01 21:55:15  1
# 2014-01-01 21:55:30  1
# 2014-01-01 21:55:45  1
# 2014-01-01 21:56:00  1

# [5 rows x 1 columns]
print(df.index)
# <class 'pandas.tseries.index.DatetimeIndex'>
# [2014-01-01 21:55:00, ..., 2014-01-01 21:56:00]
# Length: 5, Freq: 15S, Timezone: None

eastern = pytz.timezone('US/Eastern')
df.index = index.tz_localize(pytz.utc).tz_convert(eastern)
print(df)
#                            X
# 2014-01-01 16:55:00-05:00  1
# 2014-01-01 16:55:15-05:00  1
# 2014-01-01 16:55:30-05:00  1
# 2014-01-01 16:55:45-05:00  1
# 2014-01-01 16:56:00-05:00  1

# [5 rows x 1 columns]

print(df.index)
# <class 'pandas.tseries.index.DatetimeIndex'>
# [2014-01-01 16:55:00-05:00, ..., 2014-01-01 16:56:00-05:00]
# Length: 5, Freq: 15S, Timezone: US/Eastern

答案 1 :(得分:5)

最近(我认为是在2017年),一些日期时间功能已添加到熊猫中,并且是内置的。您可以使用tz_convert()转换时区。如果您的数据列/索引不支持时区,则会收到警告,并应首先使用tz_localize使数据时区可用。

df = pd.DataFrame({'Symbol': ['EUR/USD'] * 5,
                  'bid': [1.37622, 1.37624, 1.37619, 1.37616, 1.37616],
                  'ask': [1.37693, 1.37698, 1.37696, 1.37696, 1.37694]})

df.index = pd.to_datetime(['2014-01-01 21:55:34.378000',
                          '2014-01-01 21:55:40.410000',
                          '2014-01-01 21:55:47.210000',
                          '2014-01-01 21:55:57.963000',
                          '2014-01-01 21:56:03.117000'])

df.index = df.index.tz_localize('GMT')
df.index = df.index.tz_convert('America/New_York')

这对于日期时间列也类似:

df['column'] = df['column'].dt.tz_convert('America/New_York')

答案 2 :(得分:1)

要将EST时间转换为亚洲tz

df.index = data.index.tz_localize('EST')
df.index = data.index.tz_convert('Asia/Kolkata')

熊猫现在具有内置的tz转换功能。