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Python isset

How to check if var exists python

# for local
if 'myVar' in locals():
  # myVar exists.
# for globals
if 'myVar' in globals():
  # myVar exists.

5

Source: stackoverflow.com

Python check if value is undefined

try:
    thevariable
except NameError:
    print("well, it WASN'T defined after all!")
else:
    print("sure, it was defined.")

2

Source: stackoverflow.com

Python isset

d = {'foo': 1}
d.get('foo') # 1
d.get('bar') # None

0

Source: stackoverflow.com

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