I have crated the following small script. I just need to improve this complicated code if possible.

def convUnixTime(t):
    expr_date = int(t) * 86400
    fmt = '%Y-%m-%d %H:%M:%S'
    d1 = datetime.date.today().strftime('%Y-%m-%d %H:%M:%S')
    d2 = datetime.datetime.fromtimestamp(int(expr_date)).strftime('%Y-%m-%d %H:%M:%S')
    d1 = datetime.datetime.strptime(d1, fmt)
    d2 = datetime.datetime.strptime(d2, fmt)
    return (d2-d1).days
  • 1
    \$\begingroup\$ What is your reason to do strftime followed by strptime? \$\endgroup\$ Jun 12, 2013 at 9:54
  • \$\begingroup\$ new to python.. don't know much.. just created from googling.. :D \$\endgroup\$ Jun 12, 2013 at 9:56
  • 1
    \$\begingroup\$ What does this function even do? \$\endgroup\$
    – Blender
    Jun 12, 2013 at 18:41
  • \$\begingroup\$ On *nix Server it's required to Convert Unix timestamp to Readable Date/time, I used this function to check User account expiry date.. \$\endgroup\$ Jun 13, 2013 at 2:20

1 Answer 1


I think the main issue here is that you are trying to reuse snippets from Google without trying to understand what is doing what.

Magic numbers

This might be purely personal but I find 60*60*24 much easier to understand than 86400.

Do not repeat yourself

What is the point of having fmt = '%Y-%m-%d %H:%M:%S' if later on you rewrite strftime('%Y-%m-%d %H:%M:%S') ? You could write it : d1 = datetime.date.today().strftime(fmt) making obvious to everyone that the same format is used.

Useless conversion between strings and dates

You are converting dates to string and string to date in a convoluted and probably not required way.

Usess conversion to int

You are using int(expr_date)) but expr_date is defined as int(t) * 86400 which is an integer anyway. Also, I am not sure you would need the conversion of t as an int.

Taking into account the different comments, my resulting not-tested code looks like :

def convUnixTime(t):
        return (datetime.datetime.fromtimestamp(t*60*60*24)
              - datetime.datetime.today()).days

Edit : I was using datetime.date.today() instead of datetime.datetime.today(). Also fixed the sign issue.

  • \$\begingroup\$ I have tested it is giving error: TypeError: unsupported operand type(s) for -: 'datetime.date' and 'datetime.datetime' \$\endgroup\$ Jun 12, 2013 at 13:03
  • \$\begingroup\$ Arg! I'll try and think about a proper working solution then :-P \$\endgroup\$
    – SylvainD
    Jun 12, 2013 at 14:02
  • \$\begingroup\$ If t is already in seconds, then that is what datetime.datetime.fromtimestamp is expecting, you don't want to do any arithmetic with it. Also, the returned datetime.datetime object has no days member. If you meant the day member, it is the day of the month, not the number of days. \$\endgroup\$
    – Dan Ross
    Jun 12, 2013 at 22:08
  • \$\begingroup\$ I've fixed the code and it seems to be behaving just like yours (not sure if good thing or bad thing). \$\endgroup\$
    – SylvainD
    Jun 12, 2013 at 22:19
  • \$\begingroup\$ Thanks Josay for your help.. I saw.. my lazyness in small mistakes.. I will not repeat that again.. \$\endgroup\$ Jun 13, 2013 at 2:27

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