module variables python code example

Example 1: global variable not working python

trying to assign a global variable in a function will result in the function creating a new variable
with that name even if theres a global one. ensure to declare a as global in the function before any
assignment.

a = 7
def setA(value):
    global a   # declare a to be a global
    a = value  # this sets the global value of a

Example 2: Traceback (most recent call last): File "main.py", line 3, in y = eval((x**3+2*x)/(x**4+3(x**2)+1)) TypeError: 'int' object is not callable

Traceback (most recent call last):
  File "main.py", line 3, in <module>
    y = eval((x**3+2*x)/(x**4+3(x**2)+1))
TypeError: 'int' object is not callable

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