hi i would like to validate some date in python. but the problem is that i have a praticular range, for example, my date goes from 1/1/2014to 08/07/2014 . So my question is how do i validate both the format and the value. i looked at this link but it only validates the format but not the specific values.
import time
date = input('Date (mm/dd/yyyy): ')enter date here
try:
valid_date = time.strptime(date, '%m/%d/%Y')
except ValueError:
print('Invalid date!')
Rather than use time.strptime(), use datetime.datetime.strptime() and then validate the resulting object to be within your range:
from datetime import datetime, date
date_input = input('Date (mm/dd/yyyy): ')
try:
valid_date = datetime.strptime(date_input, '%m/%d/%Y').date()
if not (date(2014, 1, 1) <= valid_date <= date(2014, 8, 7)):
raise ValueError('Date out of range')
except ValueError:
print('Invalid date!')
If no exception is thrown, valid_date is bound to a datetime.date() instance.
date() constructor always takes year, month, day as the arguments; see the linked documentation.
date as a variable name?date as a variable name elsewhere in your code and have rebound the name to a string somewhere.I would like to suggest putting this into a function:
from datetime import datetime
def validate_date(input_date, first=datetime(2014, 1, 1),
last=datetime(2014, 8, 7),
fmt='%m/%d/%Y'):
"""Return a validated datetime.datetime or None.
If the date has the wrong format return None, or if it is not in
the range [first,last] also return None. Otherwise return the
input_date as a datetime.datetime object.
"""
try:
d = datetime.strptime(input_date, fmt)
if not (first <= d <= last):
raise ValueError
except ValueError:
return None
else:
return d
# Example usage...
valid_date = validate_date(input('Date mm/dd/yyyy: '))
if valid_date is not None:
print(valid_date)
else:
print('Date not ok!')
import datetime
inputDate = input("Enter the date in format 'dd/mm/yy' : ")
day,month,year = inputDate.split('/')
isValidDate = True
try :
datetime.datetime(int(year),int(month),int(day))
except ValueError :
isValidDate = False
if(isValidDate) :
print ("Input date is valid ..")
else :
print ("Input date is not valid..")
