Design a Python function that uses regular expressions to validate dates in the format "yyyy-mm-dd." The function should return True if the date is valid and False if it's not. yyyy should be between 1000 and 2023mm should be between 01 and 12dd should be between 01 and 31Sample Input:2010-04-04Sample Output:True
Question
Design a Python function that uses regular expressions to validate dates in the format "yyyy-mm-dd." The function should return True if the date is valid and False if it's not. yyyy should be between 1000 and 2023mm should be between 01 and 12dd should be between 01 and 31Sample Input:2010-04-04Sample Output:True
Solution
Sure, here is a Python function that uses regular expressions to validate dates in the format "yyyy-mm-dd":
import re
from datetime import datetime
def validate_date(date):
pattern = re.compile("^(1000|1[0-9]{3}|20[0-1][0-9]|202[0-3])-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$")
if pattern.match(date):
try:
datetime.strptime(date, '%Y-%m-%d')
return True
except ValueError:
return False
else:
return False
This function first checks if the date string matches the regular expression pattern. If it does, it then tries to create a datetime object from the string. If this is successful, the function returns True, indicating that the date is valid. If the creation of the datetime object fails (which would happen if, for example, the day is 31 but the month is February), the function returns False. If the date string does not match the regular expression pattern, the function also returns False.
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