常用模块的作业

# 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 os
path=sys.argv[1]
size= 0
for line in os.listdir(path):
    path2 = os.path.join(path, line)
    if os.path.isfile(path2):
        size+=os.path.getsize(path2)
    elif os.path.isdir(path2):
        size+=os.path.getsize(path2)
print(size)
输入方式为  python3 该py文件的路径 要查看文件夹的路径

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

#验证码
import random
def make_code(size=4):
    res = ''
    for i in range(size):
        s1 = chr(random.randint(65,90))
        s2 = str(random.randint(0,9))
        res+=random.choice([s1,s2])
    return res
print(make_code(6))

#打印进度条
import sys
import time
def progress(percent,width=50):
    if percent>1:
        percent=1
    show_str = ('[%%-%ds]'%width)%(int(percent*width)*'*')
    print('
%s %s%%'%(show_str,int(percent*100)),end='')

data_size=10250
recv_size=0
while recv_size < data_size:
    time.sleep(0.1) #模拟数据的传输延迟
    recv_size+=1024 #每次收1024

    percent=recv_size/data_size #接收的比例
    progress(percent,width=70) #进度条的宽度70

#文件copy
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)