将 Python 数据框列转换为日期格式

Question

I have a column in a dataframe that I want to convert to a date. The values of the column are either DDMONYYY or DD Month YYYY 00:00:00.000 GMT . For example, one row in the dataframe could have the value 31DEC2002 and the next row could have 31 December 2015 00:00:00.000 GMT . I think this is why I get an error when trying to convert the column to a date using pd.to_datetime or datetime.strptime to convert.

Anyone got any ideas? I'd be very grateful for any help/pointers.

Answer 1

For me working to_datetime with utc=True for converting all values to UTC and errors='coerce' for convert not parseable values to NaT (missing datetime):

df = pd.DataFrame({'date':['31DEC2002','31 December 2015 00:00:00.000 GMT','.']})

df['date'] = pd.to_datetime(df['date'], utc=True, errors='coerce')
print (df)
                       date
0 2002-12-31 00:00:00+00:00
1 2015-12-31 00:00:00+00:00
2                       NaT