#Case 1
x=1
def func():
    x=5
    print(x)

func()
5

#Case 2
x=1
def func():
    print(x) #First print statement
    x=5
    print(x) #Second print statement

func()
UnboundLocalError: local variable 'x' referenced before assignment

def func():
    x=5
    print(x)

def func():
    print(x) #First print statement
    x=5
    print(x) #Second print statement