Функция is_valid_pin_codes

def is_valid_pin_codes(pin_codes):
    pin_codes = list(set(pin_codes))
    chars = '0000'
    for i in pin_codes:
        if len(str(i)) == len(chars):
            return True
        elif pin_codes == list():
            return False

def is_valid_pin_codes(pin_codes):
    for el in pin_codes:
        # print(f"Pin_codes: {el}")
        # print(set(pin_codes))
        # print(pin_codes == set(pin_codes))
        if el.isdigit() and len(el) == len("0000"):
            return True
        elif pin_codes == [] or pin_codes != set(pin_codes): # or to use pin_codes.count(el) > 1
            return False

any([True for el in pin_codes el.isdigit() and len(el) == len("0000") elif pin_codes == [] or pin_codes != set(pin_codes)])

>>> p = ['1234','2233','3333','1111']
>>> len(p) ==  4
True
>>> len(p) ==  len(set(p))
True
>>> p[0].isdigit() and len(p[0]) == 4
True

>>> p = ('1234','2222','3333','444 ')
>>> len(p) != 4
False
>>> len(set(p)) != 4
False
>>> any(i.isdigit() for i in p)
True
>>> all(i.isdigit() for i in p)
False
>>> all(len(i)==4 for i in p)
True

def is_valid_pin_codes(pin_codes):
    print(f'{pin_codes}')
    return all(el.isdigit and len(el) == 4 for el in pin_codes)

>>> l = [2,3,1,4,3,1]
>>> list(dict.fromkeys(l))
[2, 3, 1, 4]

def is_valid_pin_codes(pin_codes):
    print(f'{pin_codes}')
    return all(el.isdigit() and len(el) == 4 for el in pin_codes)

def f(p):
    if len(p) != 4: return False
    if len(set(p)) != 4: return False
    if not all(i.isdigit() for i in p): return False
    if not all(len(i) == 4 for i in p): return False
    return True

if not all(i.isdigit() for i in p): return False

def f(p):
    if len(p) != 4: return False
    if len(set(p)) != 4: return False
    for i in p:
        if not i.isdigit(): return False
        if len(i) != 4: return False
    return True

>>> def is_valid_pin_codes(pin_codes):
...     if len(set(pin_codes))<len(pin_codes):
...         return False
...     return all(el.isdigit() and len(el) == 4 for el in pin_codes)
... 
>>> is_valid_pin_codes(['1101', '9034', '0011', '1101'])
False
>>> is_valid_pin_codes(['1101', '9034', '0011', '1102'])
True