One of my APIs give a json output
{"student":{"id": null}}
I tried comparing this null value in the following ways but none is working
if(student['id'] == "null")
if(student['id'] == None)
if(student['id'] == null)
What is the correct way to compare null values?
Full code:
students = [{"id":null},{"id":1},{"id":3}]
for student in students:
if(student['id'] is not None):
print("found student" + str(student['id']))
break
Solution:
Use None
>>> import json
>>> b = json.loads('{"student":{"id": null}}')
>>> b['student']['id'] is None
True
Original Problem:
This assignment looks like JSON but it's not (it's a native Python array with native Python dictionaries inside):
students = [{"id":null},{"id":1},{"id":3}]
This won't work because null does not exist in Python.
JSON data would come in a string:
students = '[{"id":null},{"id":1},{"id":3}]'
And you have to parse it using the json module:
>>> import json
>>> parsed_students = json.loads(students)
>>> print(parsed_students)
[{'id': None}, {'id': 1}, {'id': 3}]
Notice how null became None
if(student['id'] is not None): print("not null") but it's not working. Not sure why.
json.loads(student_array_element) eg: json.loads(student)` inside the for loop before the if statementWorking code
Most of the case in python we can't compare abc = 'null' for json null values
so we should use some hack which json.loads() gives use i.e json.loads() provide None value for json null values. So use as below;
#Check for null value as wel as json null value
if existing_tags_str and json.loads(existing_tags_str) is not None:
print("dosomething")
