convert_to_datetime.py

import datetime


def convert_to_datetime(date_string):
    """ input: %Y-%m-%d %H:%M:%S,%f
        example: 2014-01-05 22:20:50,307
        return: datetime object
    """

    date_format = "%Y-%m-%d %H:%M:%S,%f"
    return datetime.datetime.strptime(date_string, date_format)

if __name__ == '__main__':
    date_string = "2014-01-05 22:20:50,307"
    print("date_string: {0}".format(date_string))
    print("convert_to_datetime: {0}".format(convert_to_datetime(date_string)))