Посчитать, сколько раз встречается определенная цифра(цифра – это от 0 до 9) в списке чисел

from random import randint as rand
 
size = int(input('Enter list size: '))
n = int(input('Enter desired number (0-9): '))
 
arr = [rand(0, 10) for _ in range(size)]
 
#1 способ
res = 0
for i in arr:
    if i == n: res += 1
 
print(arr, res, sep = '\n')
 
#2 способ
print(arr, arr.count(n), sep = '\n')

arr = [99, 99, 99, 99]
print(arr.count(9))  # 0

from random import randint as rand
 
size = int(input('Enter list size: '))
n = int(input('Enter desired number (0-9): '))
 
arr = [rand(0, 99) for _ in range(size)]
res = []
 
for i in range(len(arr)):
    if arr[i] > 9:
        step1 = arr[i] % 10 if arr[i] != 10 else 1
        step2 = int((arr[i] - step1) / 10)
        res.append(step2)
        res.append(step1)
    else: res.append(arr[i])
 
print(arr, res.count(n), sep = '\n')

from random import randint as rand
 
def func(x, n):
    res = 0
 
    if x > 9:
        step1 = x % 10 if x != 10 else 1
        step2 = int((x - step1) / 10)
    else: step1 = x; step2 = 0
 
    if step1 == step2 == n: res += 2
    elif step1 == n or step2 == n: res += 1
 
    return res
 
size = int(input('Enter list size: '))
n = int(input('Enter desired number (0-9): '))
p = 0
 
arr = [rand(0, 99) for _ in range(size)]
 
for i in range(len(arr)):
    p += func(arr[i], n)
 
print(arr, p, sep = '\n')

from random import randint
 
 
def digcount(num, digit):
    cnt = 0
    while num > 0:
        if num % 10 == digit:
            cnt += 1
        num //= 10
    return cnt
 
 
lst = [randint(0, 1000) for _ in range(30)]
print(*lst)
digit = int(input('Digit: '))
total = 0
for item in lst:
    total += digcount(item, digit)
print(f'Total "{digit}" count: {total}')

lst = [randint(-1000, 1000) for _ in range(30)]

res = []
def func(arr, n):   
    global res
    for i in str(arr): res.append(int(i))
 
    return res
 
def neg_func(arr, n):
    global res
    for i in str(arr):
        if i != '-': res.append(int(i) * -1)
    return res
 
#size = int(input('Enter list size: '))
#n = int(input('Enter desired number (0-9): '))
size = rand(5, 20)
n = 9
 
arr = [rand(-9, 9)**(rand(1, 9)) for _ in range(size)]
 
for i in arr:
    if i >= 0: c = func(i, n)
    else: c = neg_func(i, n)
 
print(arr)
print(c)
print(c.count(n))