python学习之内置模块作业

1、检索文件夹大小的程序，要求执行方式如下:

python3.8 run.py 文件夹

import sys
import os

file_path = sys.argv[1]
def my_get_size(file_path):
    file_size = 0
    if not os.path.exists(file_path):
        print('你输入的文件路径不存在。')
        return
    if not os.path.isdir(file_path):
        print('必须输入文件夹路径。')
        return
    for dir in os.listdir(file_path):
        son_path = r'%s\%s'%(file_path,dir)
        if os.path.isfile(son_path):
            file_size += os.path.getsize(son_path)
        else:
            file_size += my_get_size(son_path)
    return file_size

res = my_get_size(file_path)
print('该文件夹的大小为: {} 字节。'.format(res))

2、明天上午日考：随机验证码、模拟下载以及打印进度条、文件copy脚本

1)随机验证码

import random
def generate_code(n=4):
    code = ''
    for i in range(n):
        s1 = chr(random.randint(65,90))
        s2 = str(random.randint(0,9))
        str1 = random.choice([s1,s2])
        code += str1
    return code

res = generate_code(6)
print(res)

2)模拟下载以及打印进度条

import time

def progress_bar(percent):
    if percent>1:
        percent = 1
    str_num = int(50*percent)*'#'
    print('
[%-50s]%s%%'%(str_num,int(percent*100)),end='')

download_size = 0
total_size = 1000000
while download_size < total_size:
    time.sleep(0.01)
    download_size += 1024
    percent = download_size / total_size
    progress_bar(percent)

3)文件copy脚本

import sys

src_file = sys.argv[1]
dst_file = sys.argv[2]
with open(r'%s'%src_file,'rb') as f1,
    open(r'%s'%dst_file,'wb') as f2:
    for line in f1:
        f2.write(line)