3.30作业

今日作业：

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,os
src = sys.argv[1]
res = 0

def size_of_file(file):
    global res
    for file1 in os.listdir(r'%s'%file):
        path = os.path.join(file,file1)
        print(path)
        if os.path.isfile(path):
            res += os.path.getsize(src)
        else:
            size_of_file(path)

if os.path.isfile(r'%s'%src):
    res = os.path.getsize(src)
else:
    size_of_file(src)
print(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

随机验证码
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())

import sys
print(sys.argv)

模拟下载以及打印进度条

import sys
import time

def progress(percent,width=50):
    if percent >= 1:
        percent=1
    show_str=('[%%-%ds]' %width) %(int(width*percent)*'#')
    print('
%s %d%%' %(show_str,int(100*percent)),file=sys.stdout,flush=True,end='')


#=========应用==========
data_size=102500
recv_size=0
while recv_size < data_size:
    time.sleep(0.5) #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脚本

import sys,time
def copy_file():
    src_file=sys.argv[1]
    dst_file=sys.argv[2]
    start=time.time()
    with open(f'{src_file}','rb') as f1,
        open(f'{dst_file}','w') as f2:
        for line in f1:
            f2.write(line.decode('utf-8'))
        else:
            print('copy successfully')
    end=time.time()
    print('copy time %s'%(end-start))

copy_file()

# C:UsersSteadyDesktop练习
# python run.py C:UsersSteadyDesktop	mp1.txt C:UsersSteadyDesktop	mp2.txt