请问这个怎么做用python🙏🙏🙏

# 生成随机密码
import random

import numpy as np

np.random.seed(0x1010)

str = 'abcdefghigklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ_0123456789'


def tianziGe(n):
    list = []
    for i in range(2 * n + 2):
        if (i == 0 or i == n or i == 2 * n + 1):
            random_str = ''.join(random.sample(str, 2 * n + 3))
            list.append(random_str)
            # print(random_str)
        else:
            random_str = ''.join(random.sample(str, 3))
            random_str = random_str.__getitem__(0) + ''.join([' ' for i in range(n)]) + random_str.__getitem__(
                1) + ''.join(
                [' ' for i in range(n)]) + random_str.__getitem__(2)
            list.append(random_str)
            # print(random_str)
    return list

n = eval(input())
list = tianziGe(n)
for i in list:
    print(i)
dict = {}
for i in list:
    for j in i.strip():
        if (dict.__contains__(j)):
            dict[j] += 1
        else:
            dict[j] = 0
print(dict)