Python-сообщество

  a = input() # запрашиваем данные
proverka = a.isnumeric() # вводим переменную, которая отвечает за проверку, .isnumeric() проверяет состоит ли строка из чисел
while proverka == False: # пока переменная проверка неверна, будем запрашивать заново ввести данные
	a = input()
	proverka = a.isnumeric()

    
while not (a := input("Input number: ")).isnumeric():
    print("bad input")
print(a)

def find_longest(text):
    all_lst = []
    t_lst = []
    previous = None
    for number in text:
        if previous == None:
            previous = number
            t_lst.append(number)
            first = True
        else:
            if first:
                first = False
                t_lst.append(previous)
            if is_even(previous):
                if not is_even(number):
                    previous = number
                    t_lst.append(number)
                else:
                    first = True
                    previous = number
                    all_lst.append(t_lst)
                    t_lst = []
            elif not is_even(previous):
                if is_even(number):
                    previous = number
                    t_lst.append(number)
                else:
                    first = True
                    previous = number
                    all_lst.append(t_lst)
                    t_lst = []
    return all_lst


def is_even(number):
    if int(number) % 2 == 0:
        return True
    else:
        return False


print(max(find_longest("1203482471275648238294239472394"), key=len))

  
>>> def f():
...     
...     numbers = []
...     
...     while True:
...         text = input('Enter numbers: ')
...         if text.replace(' ', '').isdigit():
...             for word in text.split():
...                 numbers.append(int(word))
...             break
...         else:
...             print('Found a non-digit. Try again.')
...     
...     print('Entered numbers:', *numbers)
...     
...     maxlen = 0
...     for number in numbers:
...         curlen = len(str(number))
...         if curlen > maxlen:
...             maxlen = curlen
...     
...     previous_number = None
...     for number in numbers:
...         print_flag = False
...         if number % 2 == 0:
...             print('current', number, 'is even')
...             print_flag = True
...         else:
...             print('current', number, 'is odd')
...             print_flag = False
...         if previous_number is not None:
...             if previous_number % 2 == 0:
...                 pass
...             else:
...                 print_flag = False
...         if print_flag:
...             print('current', number, 'is even', 'and',
...                   'previous', previous_number, 'is even')
...             print_flag = False
...         previous_number = number
...         
...         if len(str(number)) == maxlen:
...             print('word', number, 'is longest')
... 
>>> f()
Enter numbers: 123 456 789 1000 1002 2001 2 4 1 3
Entered numbers: 123 456 789 1000 1002 2001 2 4 1 3
current 123 is odd
current 456 is even
current 789 is odd
current 1000 is even
word 1000 is longest
current 1002 is even
current 1002 is even and previous 1000 is even
word 1002 is longest
current 2001 is odd
word 2001 is longest
current 2 is even
current 4 is even
current 4 is even and previous 2 is even
current 1 is odd
current 3 is odd
>>>