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 common question but I could not find it online    I was thinking about the calendar module  I see that to convert from month number to abbreviated month name you can just do calendar month abbr num   I do not see a way to go the other direction though  Would creating a dictionary for converting the other direction be the best way to handle this  Or is there a better way to go from month name to month number and vice versa

User · Answer

If you don t want to import the calendar library  and need something that is a bit more robust -- you can make your code a little bit more dynamic to inconsistent text input than some of the other solutions provided  You can   Create a month to number dictionary loop through the  items   of that dictionary and check if the lowercase of a string s is in a lowercase key k    month to number      January    1            February    2            March    3              April    4                 May    5    June    6   July    7    August    8    September    9    October    10    November    11    December    12   s    jun   v for k  v in month to number items   if s lower   in k lower    0   Out 1   6  Likewise  if you have a list l instead of a string  you can add another for to loop through the list  The list I have created has inconsistent values  but the output is still what would be desired for the correct month number  l     January    february    mar    Apr    MAY    JUne    july    v for k  v in month to number items   for m in l if m lower   in k lower     Out 2    1  2  3  4  5  6  7   The use case for me here is that I am using Selenium to scrape data from a website by automatically selecting a dropdown value based off of some conditions  Anyway  this requires me relying on some data that I believe our vendor is manually entering to title each month  and I don t want to come back to my code if they format something slightly differently than they have done historically

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One more   def month converter month       months     Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec       return months index month    1

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Create a reverse dictionary using the calendar module  which  like any module  you will need to import    month  index for index  month in enumerate calendar month abbr  if month   In Python versions before 2 7  due to dict comprehension syntax not being supported in the language  you would have to do dict  month  index  for index  month in enumerate calendar month abbr  if month

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You can use below as an alternative   Month to month number   from time import strptime strptime  Feb    b   tm mon  Month number to month   import calendar calendar month abbr 2  or calendar month 2

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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   gt  Jan    B   gt  January dateteime datetime strftime datetime object    b

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Just for fun   from time import strptime  strptime  Feb    b   tm mon

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Using calendar module   Number-to-Abbr calendar month abbr month number   Abbr-to-Number list calendar month abbr  index month abbr

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form month name to number d   JAN   FEB   MAR   April   MAY   JUN   JUL   AUG   SEP   OCT   NOV   DEC   N input   for i in range len d        if d i     N          month  i 1  print month

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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

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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

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Building on ideas expressed above  This is effective for changing a month name to its appropriate month number   from time import strptime monthWord    september   newWord   monthWord  0  upper     monthWord  1 3  lower      converted to  Sep   print strptime newWord   b   tm mon      Sep  converted to  9  by strptime

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To get the full calendar name from the month number  you can use calendar month name  Please see the documentation for more details  https   docs python org 2 library calendar html month no   1 month   calendar month name month no     month provides  quot January quot   print month

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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    gt  gt  gt  month string to number  October   10   gt  gt  gt  month string to number  oct   10

[python] month name to month number and vice versa in python

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