作业20200330

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

run.py

import os
import sys

def get_size(dir):
    items = os.listdir(dir)
    for item in items:
        item = os.path.join(dir, item)
        if os.path.isdir(item):
            get_size(item)
            
        file_size = os.path.getsize(item)
        items_size.append(file_size)
        
        
if not sys.argv:
    print('文件夹不存在')
    sys.exit()        
            
items_size =[]
get_size(sys.argv[1])
print(sum(items_size))

2、随机验证码

import random

def make_mode(size=4):
    res = ''
    for _ in range(size):
        s1 = str(chr(random.randint(65, 90)))
        s2 = str(random.randint(0,9))
        res += random.choice([s1, s2])
    return res

code = make_mode(6)

3、模拟下载及打印进度条

import time


def progress(percent):
    if percent > 1:
        percent = 1
    res = int(50 * percent) * '#'
    print('\r[%-50s] %d%%' % (res, int(100 * percent)), end='')

recv_size=0
total_size=1025011

while recv_size < total_size:
    time.sleep(0.01)
    recv_size+=1024
    percent = recv_size / total_size 
    progress(percent)

4、copy文件脚本

run.py

import sys

src_file=sys.argv[1]
dst_file=sys.argv[2]

with open(r'%s' %src_file,mode='rb') as read_f,\
    open(r'%s' %dst_file,mode='wb') as write_f:
    for line in read_f:
        write_f.write(line)

print('拷贝完成')