python utility function to convert javascript / java date format string -> python format string

convert.py

def convert_to_string(dt, date_format):
    date_format = date_format.replace("yyyy", "%Y")
    date_format = date_format.replace("yy", "%y")
    date_format = date_format.replace("MMMM", "%B")
    date_format = date_format.replace("MMM", "%b")
    date_format = date_format.replace("MM", "%m")
    date_format = date_format.replace("M", "%m")
    date_format = date_format.replace("dddd", "%A")
    date_format = date_format.replace("ddd", "%a")
    date_format = date_format.replace("dd", "%d")
    date_format = date_format.replace("HH", "%H")
    date_format = date_format.replace("mm", "%M")
    date_format = date_format.replace("ss", "%S")

    return dt.strftime(date_format)

>>> now = datetime.datetime.now()
>>> convert_to_string(now, 'dd/MM/yyyy HH:mm:ss')
'20/04/2016 14:41:17'