Exception Handling in Python

import itertools
l1=(1, 2, 3)
l2=[4, 5, 6]
l=itertools.chain(l1, l2)
print(next(l1))

def f(x):
    for i in range(5):
        yield i
g=f(8)
print(list(g))

try:
    if '1' != 1:
        raise "someError"
    else:
        print("someError has not occurred")
except "someError":
    print ("someError has occurred")

try:
    # Do something
except:
    # Do something
else:
    # Do something

4 + '3'