Python 设置系列中的日期时间值时,使用COPYWARNING进行设置
在使用iloc设置pandas系列中的值时,我得到了一个设置WithCopyWarning。我正在使用pandas 0.21.1和python 3.6.7Python 设置系列中的日期时间值时,使用COPYWARNING进行设置,python,python-3.x,pandas,Python,Python 3.x,Pandas,在使用iloc设置pandas系列中的值时,我得到了一个设置WithCopyWarning。我正在使用pandas 0.21.1和python 3.6.7 import pandas as pd from datetime import datetime from pytz import timezone tz = timezone('CET') ambiguous_dst = True expected_dt_series = pd.Series([ datetime(2018,
import pandas as pd
from datetime import datetime
from pytz import timezone
tz = timezone('CET')
ambiguous_dst = True
expected_dt_series = pd.Series([
datetime(2018, 10, 28, 1),
datetime(2018, 10, 28, 2),
datetime(2018, 10, 28, 3),
datetime(2018, 10, 28, 4),
])
expected_dt_series = expected_dt_series.dt.tz_localize(
tz, ambiguous='NaT')
expected_dt_series.iloc[1] = tz.localize(
datetime(2018, 10, 28, 2), is_dst=ambiguous_dst) # <- line that causes error
expected_dt_series = expected_dt_series.astype('object')
正是这一部分导致了问题:
expected_dt_series=expected_dt_series.dt.tz_localize(tz,dimensional='NaT')
使用copy
expected_dt_series = expected_dt_series.dt.tz_localize(
tz, ambiguous='NaT').copy()
expected_dt_series.iloc[1] = tz.localize(
datetime(2018, 10, 28, 2), is_dst=ambiguous_dst)
明白了,谢谢。我混淆了Series.dt.tz_本地化和Series.tz_本地化的文档。
expected_dt_series = expected_dt_series.dt.tz_localize(
tz, ambiguous='NaT').copy()
expected_dt_series.iloc[1] = tz.localize(
datetime(2018, 10, 28, 2), is_dst=ambiguous_dst)