How to check if a string is null in python

+1 vote

This question already has an answer here:

I have a value cookie that is returned from a POST call using Python.

I need to check whether the cookie value is empty or null. Thus I need a function or expression for the if condition. How can I do this in Python? For example:

if cookie == NULL if cookie == None

P.S. cookie is the variable in which the value is stored.

Aug 20, 2018 in Python by bug_seeker
• 15,350 points
2,788 views

1 answer to this question.

0 votes

Try this:

if cookie and not cookie.isspace():
# the string is non-empty
else:
# the string is empty

The above takes in consideration the cases where the string is None or a sequence of white spaces.

answered Aug 20, 2018 by Priyaj
• 56,540 points

Related Questions In Python

0 votes
1 answer

How to check if a substring is present in a string using Python?

To check if the substring exists in ...READ MORE

answered May 9 in Python by Sharan
44 views
+1 vote
1 answer

How to check if a string is in a file, using python?

Hi, Try the below given code: with open('myfile.txt') as ...READ MORE

answered Jul 4 in Python by Shabnam
• 920 points
39 views
0 votes
1 answer

How do I check if input string is a valid regular expression or not in Python?

Hi. Good question! Well, just like what ...READ MORE

answered Feb 12 in Python by Nymeria
• 3,520 points
72 views
0 votes
1 answer

How to check if a string ends with a character in python?

You can use the endswith method. It checks ...READ MORE

answered Apr 4 in Python by Srisha
55 views
+1 vote
2 answers

how can i count the items in a list?

Syntax :            list. count(value) Code: colors = ['red', 'green', ...READ MORE

answered Jul 6 in Python by Neha
• 330 points

edited Jul 8 by Kalgi 235 views
+4 votes
6 answers
–1 vote
2 answers

How to find the size of a string in Python?

following way to find length of string  x ...READ MORE

answered Mar 29 in Python by rajesh
• 1,210 points
83 views
0 votes
1 answer

In python how to test a string for a substring

if "ABCD" in "xxxxABCDyyyy": This can be used ...READ MORE

answered Oct 24, 2018 in Python by Priyaj
• 56,540 points
67 views