CODEWITHSUNDEEP
pythondatedatetime
Jessica Smith
Jessica Smith

Reputation: 63

MM/DD/YYYY Date to variable conversion m,d, and y

I am struggling to find the best way to convert the date input given by the user as mm/dd/yyyy to 3 variables. I am unable to split this because I receive an error since it is a 'float'.

>>> date=3/2/2016
>>> date.split('/')
Traceback (most recent call last):
  File "<pyshell#152>", line 1, in <module> date.split('/')
AttributeError: 'float' object has no attribute 'split'

what do I need to add to this to make sure it doesn't evaluate the date with division?

def main():
    date=input("Enter date mm/dd/yyyy: ")

I want the input date given as mm/dd/yyyy, and then a way to convert this to 3 variables as m=month d=day y=year

What's the best way to do this?

Upvotes: 1

Views: 3332

Answers (4)

Sash Sinha
Sash Sinha

Reputation: 22418

Try str.split:

>>> test_date = "05/12/2016"
>>> month, day, year = test_date.split('/')
>>> print(f"Month = {month}, Day = {day}, Year = {year}")
Month = 05, Day = 12, Year = 2016

Upvotes: 2

jfs
jfs

Reputation: 414585

The error "'float' object has no attribute 'split'" suggests that type(date) == float in your example that implies that you are trying to run Python 3 code using Python 2 interpreter where input() evaluates its input as a Python expression instead of returning it as a string.

To get the date as a string on Python 2, use raw_input() instead of input():

date_string = raw_input("Enter date mm/dd/yyyy: ")

To make it work on both Python 2 and 3, add at the top of your script:

try: # make input() and raw_input() to be synonyms
    input = raw_input
except NameError: # Python 3
    raw_input = input

If you need the old Python 2 input() behavior; you could call eval() explicitly.

To validate the input date, you could use datetime.strptime() and catch ValueError:

from datetime import datetime

try:
    d = datetime.strptime(date_string, '%m/%d/%Y')
except ValueError:
    print('wrong date string: {!r}'.format(date_string))

.strptime() guarantees that the input date is valid otherwise ValueError is raised. On success, d.year, d.month, d.day work as expected.

Putting it all together (not tested):

#!/usr/bin/env python
from datetime import datetime

try: # make input() and raw_input() to be synonyms
    input = raw_input
except NameError: # Python 3
    raw_input = input

while True: # until a valid date is given
    date_string = raw_input("Enter date mm/dd/yyyy: ") 
    try:
        d = datetime.strptime(date_string, '%m/%d/%Y')
    except ValueError: # invalid date
        print('wrong date string: {!r}'.format(date_string))
    else: # valid date
        break 

# use the datetime object here
print("Year: {date.year}, Month: {date.month}, Day: {date.day}".format(date=d))

See Asking the user for input until they give a valid response.

You could use .split('/') instead of .strptime() if you must:

month, day, year = map(int, date_string.split('/'))

It doesn't validate whether the values form a valid date in the Gregorian calendar.

Upvotes: 0

Andr&#233;s P&#233;rez-Albela H.
Andr&#233;s P&#233;rez-Albela H.

Reputation: 4021

Try:

def main():
    month, day, year = [int(x) for x in raw_input("Enter date mm/dd/yyyy: ").split('/')]
    print "Month: {}\n".format(month), "Day: {}\n".format(day), "Year: {}".format(year)

main()

Output:

Enter date mm/dd/yyyy: 03/09/1987
Month: 3
Day: 9
Year: 1987

Upvotes: -1

Annapoornima Koppad
Annapoornima Koppad

Reputation: 1466

I wrote this following piece of code and it works perfectly fine.

>>> date='3/2/2016'
>>> new=date.split('/')
>>> new
['3', '2', '2016']
>>> 
>>> m,d,year=new
>>> m
'3'
>>> d
'2'
>>> year
'2016'
>>>

Like Jessica Smith has already pointed it out, date=3/2/2016 evaluates expressions and divides the numbers. It has to be of string string type to be split.

Upvotes: 0

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