Python-сообщество

 first_num = input('input first number:')
length_f_of_num = len(first_num)
first_num = int(first_num)
#
second_num = input('input second number:')
length_s_of_num = len(second_num)
second_num = int(second_num)
#
for s_num in range(1, length_s_of_num+1):
    #
    remainder_of_2_div = second_num % 10
    div_zero_2 = second_num // 10
    second_num = div_zero_2
    for f_num in range(1, length_f_of_num+1):
        #
        remainder_of_1_div = first_num % 10
        div_zero_1 = first_num // 10
        first_num = div_zero_1
        #
        if remainder_of_2_div == remainder_of_1_div:
            print(f'Number {remainder_of_1_div} located on {f_num} position')

  
>>> def split_number(number):
...     out = []
...     if number == 0:
...         out.append(0)
...     while number:
...         out.insert(0, number % 10)
...         number //= 10
...     return out
... 
>>> split_number(12345)
[1, 2, 3, 4, 5]
>>> 
>>> split_number(0)
[0]
>>> split_number(12345012345)
[1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5]
>>

 first_num = input('input first number:')
second_num = input('input second number:')
for s_num in second_num:  # перебираем посимвольно second_num
    find_flag = False
    for i, f_num in enumerate(first_num[::-1]): # перебираем first_num
        if s_num == f_num: # если совпадает
            print('num {} position {}'.format(s_num, i+1)) # выводим индекс
            find_flag = True
    if not find_flag:  # если нет ни одного совпадения
        print('num {} not present in  {}'.format(s_num, first_num))

 def num_len(num):
    '''
       Определяем колличество цифр в числе без использования строк
    '''
    count = 1
    num //= 10
    while num >0:
        num //= 10
        count += 1
    return count
def get_dig(ind, num):
    '''
       Получить цифру стоящую в разряде ind числа num, без использования строк
    '''
    i = 1
    while i < ind:
        num //= 10
        i += 1
    return num % 10
first_num = int(input('input first number:'))
second_num = int(input('input second number:'))
for s_ind in range(1, num_len(second_num)+1): # перебираем second_num
    find_flag = False
    s_dig = get_dig(s_ind, second_num) # получаем число стоящее в s_ind разряде
    for f_ind in range(1, num_len(first_num)+1): # перебираем first_num
        f_dig = get_dig(f_ind, first_num) # получаем число стоящее в f_ind разряде
        if s_dig == f_dig: # если совпадает
            print('num {} position {}'.format(s_dig, f_ind)) 
            find_flag = True
    if not find_flag:
        print('num {} not present in  {}'.format(s_dig, first_num))

 a = 765432
b = 250
for c in str(b):
	i = str(a).find(c)
	if i == -1:
		print('Цифра {}: отсутствует'.format(c))
	else:
		# считаем слева направо:
		print('Цифра {}: позиция {}'.format(c,i+1))
		# считаем справа налево:
		#print('Цифра {}: позиция {}'.format(c,len(str(a))-i))

 first_num = input('input first number:')
if first_num.isnumeric():
    length_f_of_num = len(first_num)
    if length_f_of_num >= 1 and length_f_of_num <= 6:
        first_num = int(first_num)
        temp_num = first_num
        #
        second_num = input('input second number:')
        if second_num.isnumeric():
            length_s_of_num = len(second_num)
            if length_s_of_num >=1 and length_s_of_num <=6:
                second_num = int(second_num)
                #
                for s_num in range(1, length_s_of_num+1):
                    #
                    remainder_of_2_div = second_num % 10
                    div_zero_2 = second_num // 10
                    second_num = div_zero_2
                    #
                    for f_num in range(1, length_f_of_num+1):
                        #
                        remainder_of_1_div = first_num % 10
                        div_zero_1 = first_num // 10
                        first_num = div_zero_1
                        #
                        if remainder_of_2_div == remainder_of_1_div:
                            print(f'Number {remainder_of_1_div} located on {f_num} position')
                        elif div_zero_1 == 0:
                            first_num = temp_num
            else:
                print('You can input digital from  1 to 999 999')
        else:
            print('Second field accept only digital')
    else:
        print('You can input digital from 1 to 999 999')
else:
    print('First field accept only digital')

 print(f'Number {remainder_of_1_div} located on {f_num} position')

 print('Number {} located on {} position'.format(remainder_of_1_div, f_num))

 length_f_of_num = len(first_num)