month name to month number and vice versa in python

Question

I am trying to create a function that can convert a month number to an abbreviated month name or an abbreviated month name to a month number. I thought this might be a commo

Answer 1

Information source: Python Docs

To get month number from month name use datetime module

import datetime
month_number = datetime.datetime.strptime(month_name, '%b').month

# To  get month name
In [2]: datetime.datetime.strftime(datetime.datetime.now(), '%a %b %d, %Y')
Out [2]: 'Thu Aug 10, 2017'

# To get just the month name, %b gives abbrevated form, %B gives full month name
# %b => Jan
# %B => January
dateteime.datetime.strftime(datetime_object, '%b')

Answer 2

Here is a more comprehensive method that can also accept full month names

def month_string_to_number(string):
    m = {
        'jan': 1,
        'feb': 2,
        'mar': 3,
        'apr':4,
         'may':5,
         'jun':6,
         'jul':7,
         'aug':8,
         'sep':9,
         'oct':10,
         'nov':11,
         'dec':12
        }
    s = string.strip()[:3].lower()

    try:
        out = m[s]
        return out
    except:
        raise ValueError('Not a month')

example:

>>> month_string_to_number("October")
10 
>>> month_string_to_number("oct")
10

Answer 3

def month_num2abbr(month):
    month = int(month)
    import calendar
    months_abbr = {month: index for index, month in enumerate(calendar.month_abbr) if month}
    for abbr, month_num in months_abbr.items():
        if month_num==month:
            return abbr
    return False

print(month_num2abbr(7))

Answer 4

Here's yet another way to do it.

monthToNum(shortMonth):

    return {
            'jan' : 1,
            'feb' : 2,
            'mar' : 3,
            'apr' : 4,
            'may' : 5,
            'jun' : 6,
            'jul' : 7,
            'aug' : 8,
            'sep' : 9, 
            'oct' : 10,
            'nov' : 11,
            'dec' : 12
    }[shortMonth]

Answer 5

Using calendar module:

Number-to-Abbr calendar.month_abbr[month_number]

Abbr-to-Number list(calendar.month_abbr).index(month_abbr)

Answer 6

Just for fun:

from time import strptime

strptime('Feb','%b').tm_mon