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Description
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Note: Please read this guide detailing how to provide the necessary information for us to reproduce your bug.
Code Sample, a copy-pastable example
>>> import pandas as pd
>>> timezone = 'America/New_York'
>>> start = pd.Timestamp(year=2020, month=11, day=1, hour=1).tz_localize(timezone, ambiguous=False)
>>> pd.date_range(start, periods=2, ambiguous=False)
---------------------------------------------------------------------------
AmbiguousTimeError Traceback (most recent call last)
<ipython-input-5-d142fd70e406> in <module>
2 timezone = 'America/New_York'
3 start = pd.Timestamp(year=2020, month=11, day=1, hour=1).tz_localize(timezone, ambiguous=False)
----> 4 pd.date_range(start, periods=2, ambiguous=False)
~/anaconda3/envs/oids_tst/lib/python3.6/site-packages/pandas/core/indexes/datetimes.py in date_range(start, end, periods, freq, tz, normalize, name, closed, **kwargs)
1178 normalize=normalize,
1179 closed=closed,
-> 1180 **kwargs,
1181 )
1182 return DatetimeIndex._simple_new(dtarr, tz=dtarr.tz, freq=dtarr.freq, name=name)
~/anaconda3/envs/oids_tst/lib/python3.6/site-packages/pandas/core/arrays/datetimes.py in _generate_range(cls, start, end, periods, freq, tz, normalize, ambiguous, nonexistent, closed)
419 # start/end as well to compare
420 if start is not None:
--> 421 start = start.tz_localize(tz).asm8
422 if end is not None:
423 end = end.tz_localize(tz).asm8
pandas/_libs/tslibs/timestamps.pyx in pandas._libs.tslibs.timestamps.Timestamp.tz_localize()
pandas/_libs/tslibs/tzconversion.pyx in pandas._libs.tslibs.tzconversion.tz_localize_to_utc()
AmbiguousTimeError: Cannot infer dst time from 2020-11-01 01:00:00, try using the 'ambiguous' argumentProblem description
When the start time is at the day light saving ambiguous time, date_range raises errors even when the argument 'ambiguous' is set. It should not be raising error when the argument is set.
Issue could be due to the line
pandas/pandas/core/arrays/datetimes.py
Line 421 in 32ed15d
does not correctly pass the argument ambiguous to the function
tz_localize().
Expected Output
No error
Output of pd.show_versions()
AmbiguousTimeError: Cannot infer dst time from 2020-11-01 01:00:00, try using the 'ambiguous' argument