PCEP Variable Scope and the `global` keyword 4

Question 1

What is the output?

result = []
for i in range(3):
    result.append(i)
print(i)

Accepted Answer

2

Answer

The loop variable i persists in module scope after the loop and holds its last value, 2.

Question 2

What does the nonlocal keyword do in a nested function?

Accepted Answer

Allows the inner function to rebind a variable in the nearest enclosing function's scope

Answer

nonlocal targets the nearest enclosing (non-global) scope, letting the inner function modify that variable.

Question 3

Which of the following correctly modifies a global list inside a function WITHOUT using the global keyword?

Accepted Answer

my_list.append(1)

Answer

Calling a method like append() mutates the object in place without rebinding the name, so global is not needed.

Question 4

What is the output?

x = 5
def show():
    print(x)
show()
x = 10
show()

Accepted Answer

5
10

Answer

Each call to show() reads x from global scope at the time of the call: first 5, then 10.

Question 5

What is the scope of a variable defined inside an if block at module level?

Accepted Answer

Module (global) scope — if blocks don't create a new scope

Answer

Python has no block scope; variables created inside if, for, or with blocks belong to the enclosing function or module scope.

(PCEP) Certified Entry-Level Python Programmer Practice Test