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How to convert day, month, year format to date?

I am trying to run a python script that converts the date, month, year format to date.

I tried to execute the following script;

# dateconvert2.py 
# Converts day month and year numbers into two date formats

def main():
    # get the day month and year
    day, month, year = eval(input("Please enter day, month, year numbers: "))

    date1 = str(month)+"/"+str(day)+"/"+str(year)

    months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "Novemeber", "December"]
    monthStr = months[month-1]
    date2 = monthStr+" " + str(day) + ", " + str(year)

    print("The date is", date1, "or", date2+ ".")
main()

The result should look like this:

>>> Please enter day, month,  and year numbers: 24, 5, 2003
The date is 5/24/2003 or May 24, 2003.

When I ran the program, an error appeared indicating that the line;

    monthStr = months[month-1]

had an index error.

What can I do to improve this? Please, help

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2 answers


If a

monthStr = months[month-1]

had an index error, which means it month

was either less than 1 or greater than 12. You can check it in the correct range up to this line.

A few notes

Modified code:



def main():
    # get the day month and year
    day, month, year = map(int, input("Please enter day, month, year numbers: ").split(','))

    date1 = '%02d/%02d/%d' % (day, month, year)

    months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]
    if month > 0 and month < 13:
        month_str = months[month-1]
        ## alternative :
        # import calendar
        # month_str = calendar.month_name[month]
        date2 = '%s %d, %d' % (month_str, day, year)
        print("The date is", date1, "or", date2+ ".")
    else:
        print("Invalid month")
main()

As an example:

Please enter day, month, year numbers: 24,12,2017
The date is 24/12/2017 or December 24, 2017.

but:

Please enter day, month, year numbers: 24,0,2017
Invalid month
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day, month, year = eval(input("Please enter day, month, year numbers: "))

eval () is not required here if your user knows to separate with commas, which you can simply use:

day, month, year = input("Please enter comma seperated day, month, year numbers: ")


can only work in 2.x, see comments below, sorry for confusion

then in regards to input, you should validate your data:

if 1 <= month <= 12:
    if (month in [1,3,5,7,8,10,12]) and (day != 31):
        print 'error'
    elif (month in [4,6,9,11]) and (day != 30):   
        print 'error'
    elif (month==2) and (day not in [28,29]):
        print 'error'
else:
    print 'error'
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