Python dateutil, check which value is given

Question

I am parsing an excel document and get date time values...

I am using dateutil to convert it to python datetime values...

For example if incoming value is '2012' i need a way to understand that only year is given

or if value is '13:05' only hour-minute is given.

from dateutil.parser import *            
def convertToDatetime(inValue):
    #if inValue is '2012' i need a way to understand only year is given. Can i do this while     parse method is used?
    rVal = parse( inValue )
    return rVal

How can i accomplish this?

----- EDIT ----

I can ask the question in this way too:

If only the year is given dateutil completes the day and month with today's values... But i need null values for month and day if only year is given...

Answer 1

This feature is yet to be implemented in the dateutil module. You can modify this snippet as per your requirement though.

from dateutil import parser
from datetime import datetime
import warnings

def double_parse(dt_str):
    dflt_1 = datetime(1, 1, 1)
    dflt_2 = datetime(2, 2, 2)

    dt1 = parser.parse(dt_str, default=dflt_1)
    dt2 = parser.parse(dt_str, default=dflt_2)

    if dt2.year != dt1.year:
        warnings.warn('Year is missing!', RuntimeWarning)
        return dt1.replace(year=datetime.now().year)

    return dt1

if __name__ == "__main__":
    print(double_parse('2017-04-05'))
    # 2017-04-05 00:00:00

    print(double_parse('03:45 EST'))
    # stderr: RuntimeWarning: Year is missing!
    # 2017-01-01 03:45:00-05:00