codemickeycode codemickeycode - 6 months ago 73
Python Question

How do I validate a date string format in python?

I have a python method which accepts a date input as a string.

How do I add a validation to make sure the date string being passed to the method is in the ffg. format:

'YYYY-MM-DD'


if it's not, method should raise some sort of error

Answer
>>> import datetime
>>> def validate(date_text):
    try:
        datetime.datetime.strptime(date_text, '%Y-%m-%d')
    except ValueError:
        raise ValueError("Incorrect data format, should be YYYY-MM-DD")


>>> validate('2003-12-23')
>>> validate('2003-12-32')

Traceback (most recent call last):
  File "<pyshell#20>", line 1, in <module>
    validate('2003-12-32')
  File "<pyshell#18>", line 5, in validate
    raise ValueError("Incorrect data format, should be YYYY-MM-DD")
ValueError: Incorrect data format, should be YYYY-MM-DD
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