check the input format of a date python
>>> import datetime
>>> def validate(my_str_date):
try:
datetime.datetime.strptime(my_str_date, '%Y-%m-%d')
except ValueError:
raise ValueError("Incorrect data format, should be YYYY-MM-DD")
>>> validate('2003-12-23')
>>> validate('2003/12/23')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 5, in validate
ValueError: "Incorrect data format, should be YYYY-MM-DD"