Question

I’m trying to define variable inside function. vars() shows variable is created, but gives me NameError: exception. What am I doing wrong?

def a(str1):
    vars() [str1] =  1
    print vars()
    print b


a('b')

output:

{'str1': 'b', 'b': 1}

exception:

NameError: global name 'b' is not defined

Answer 1

Your code works for me. Perhaps you should try an alternative approach:

exec(str1 + '=1')

This will execute b=1