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
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)
python3.8 run.py src_file dst_file
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
import random
def make_code(n):
res=''
for i in range(n):
s1=chr(random.randint(65,90))
s2=str(random.randint(0,9))
res+=random.choice([s1,s2])
return res
print(make_code(9))
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) # 下载了1024个字节的数据
recv_size+=1024 # recv_size=2048
percent = recv_size / total_size # 1024 / 333333
progress(percent)
