Question

How to determine if variable name is defined in Python

Answer 1

try:
    x
except NameError:
    print("x does not exist")

  
  
'''
run:
   
x does not exist
   
'''

 

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Answer 2

x = 901

if 'x' in locals():
	print("x =", x)
    
if 'y' in locals():
	print("y =", y)

  
  
'''
run:
   
x = 901
   
'''

 

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