Reason for error when using exec() within a function in python

If I make a code like:

lists = ["a='1'", "b='2'", "c=a+b"]  returned_list = []  for x in lists:      exec(x)  print(c)  

It works, and It print "12". but, If I use exec() in function:

lists = ["a='1'", "b='2'", "c=a+b"]  def test(lst):      for x in lists:          exec(x)        print(c)  test(lists)  

It returns NameError: name 'c' is not defined. How could I use exec() in function?

https://stackoverflow.com/questions/66620674/reason-for-error-when-using-exec-within-a-function-in-python March 14, 2021 at 10:59AM