Exception Handling in Python

lst = [1, 2, 3]
lst[3]

def a():
    try:
        f(x, 4)
    finally:
        print('after f')
    print('after f?')
a()

x=10
y=8
assert x>y, 'X too small'

#generator
def f(x):
    yield x+1
g=f(8)
print(next(g))

valid = False
while not valid:
    try:
        n=int(input("Enter a number"))
        while n%2==0:
            print("Bye")
        valid = True
    except ValueError:
        print("Invalid")

def foo():
    try:
        return 1
    finally:
        return 2
k = foo()
print(k)