Python Tasks & ML | Задачи по питону и машинному обучению

class MyExc(Exception):
    def __str__(self): 
        return 'my-exc'
try:
    raise MyExc()
    print('try')
except MyExc as err:
    print(err)
else:
    print('else')

val = # ваш код
shoes = {'name': 'fashion shoes', 'price': 14900}
def discount(item, discount):
    price = int(item['price']) * (1.0 - discount)
    assert 0 <= price <= item['price']
    return price
discount(shoes, val)

sum([3 >> i for i in range(200)])

class Error(Exception): pass

def handle(file):
    raise Error()
    
file = open('mydata', 'w') 

try:
    handle(file)
    print('one')
finally:
    file.close() 

print('two')

class A:
    def message(self):
        print('1', end='') 
        
    def __enter__(self):
        print('2', end='') 
        return self
    
    def __exit__(self, exc_type, exc_value, exc_tb):
        if exc_type is None:
            print('3', end='')  
        else:
            print ('4', end='')
            return True   
        
with A() as action:
    action.message()

def f(*seqs):
    seqs = [list(s) for s in seqs]
    while all(seqs):
        yield tuple(s.pop(0) for s in seqs)
s1, s2 = 'ab', '123'
print(list(f(s1, s2)))

x = 0
try:
    x += 1
    try: 
        x += 1
        1/0
    except ZeroDivisionError:
        x += 1
except ZeroDivisionError:
    x += 1
else: 
    x += 1
print(x)

sum([1 << i for i in range(5)])

d = {'a': 1, 'b': 2, 'c': 3}
x = [string for string, digit in d.items() if digit > 1]
print(x)

x = 0
try:
    x += 1
except ZeroDivisionError:
    x += 1
else: 
    x += 1
    1/0
    x += 1
print(x)