def f(*seqs, pad=None):
    seqs = [list(S) for S in seqs]
    while any(seqs):
        yield tuple((S.pop(0) if S else pad) for S in seqs)
s1, s2 = '987', 'xy'
print(list(f(s1, s2)))

a = [1]
a.append(a)
print([*a])

IOError is OSError

def a(z):
    x = 0
    try:
        x += 1
        100/z
        x += 1
    except ZeroDivisionError:
        try:
            x += 1
        finally:
            x += 1
            return 10 * x
    finally:
        x += 1
        return 100 * x
a(0)

from math import log, exp
x = log(exp(7)) + exp(log(3))
print(x)

try:
    try:
        raise IndexError
    except:
        pass
    finally:
        print('1', end='')
finally:
    print('2')

256 >> 7 << 1 << 2 >> 3 >> 1

def g(*args):
    return sum([f() if callable(f) else f for f in args])
x = g(lambda: 1, lambda: 2, 3, 4)
print(x)

def f1(): 
    raise IndexError
def f2(): 
    return
def f3(): 
    raise SyntaxError
counters = []
for func in (f1, f2, f3):
    counter = 0
    try:
        try:
            func()
        except IndexError:
            counter += 1   
        except SyntaxError:
            counter += 1  
    finally:
        counter += 1
    counters.append(counter)
print(counters)