to_datetime parsing bug when using format · Issue #4152 · pandas-dev/pandas (original) (raw)

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Description

import datetime as dt import pandas as pd val = '01-Apr-2011 00:00:01.978' print 'pandas version:',pd.version print 'Value to parse:',val format = '%d-%b-%Y %H:%M:%S.%f' print 'datetime.strptime :',dt.datetime.strptime(val, format) print 'to_datetime, w/out format:',pd.to_datetime(val) print 'to_datetime, w/ format :', pd.to_datetime(val, format=format)

pandas version: 0.12.0.dev-1101391 Value to parse: 01-Apr-2011 00:00:01.978 datetime.strptime : 2011-04-01 00:00:01.978000 to_datetime, w/out format: 2011-04-01 00:00:01.978000 to_datetime, w/ format : 2011-03-31 23:24:13.516352