python - How can I avoid this "variable referenced before assignment"? -


this question has answer here:

ran following problem. it's simple solution, , has been asked here before, couldn't find it.

def a():     lia = []     def b():         in lia:             += 1         lib = generatelist()         in lib:             -= 1         lia = lib      def generatelist():         return [1,2,3,4]      b()  a()

unboundlocalerror: local variable 'lia' referenced before assignment

lia variable in b() function never initialized.

so, should edit code in followed way:

def a():     lia = []     def b(lia):         in lia:             += 1         lib = generatelist()         in lib:             -= 1         lia = lib      def generatelist():         return [1,2,3,4]      b(lia)  a()

hope helped you!


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