day 22

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

'''
c.txt
hahaha
hahaha
hahaha
'''

'''run.py'''
import os

os.system('python3 /Users/tophan/2020_python/day22/sys.argv应用.py /Users/tophan/2020_python/day22/c.txt')


'''sys.argv应用.py'''
import sys
import os

res = sys.argv[1]
if os.path.exists(res):
    size = os.path.getsize(res)
    print(f'文件大小为{size}') #文件大小为21

2、随机验证码

import random

def make_code(size_num):
    '''
    验证功能
    size_num:验证码字符个数
    '''
    str1 = ''  #验证码
    for i in range(size_num):
        #大写字母
        str_upper = chr(random.randint(65, 90))  # A-Z
        #小写字母
        str_lower = chr(random.randint(97, 122))  # a-z
        #数字
        num = str(random.randint(0, 9)) #0-9
        res = random.choice((str_lower, str_upper, num))
        str1 += res
    return str1

res = make_code(6)

3、进度条

import time
def progress(percent):
    res_str = '#' * int(percent * 50)
    time.sleep(0.01)
    print('\r[%- 50s] %d%%' % (res_str, int(100 * percent)), end='')


total_size = 333333
recv_size = 0
while recv_size < total_size:
    # 未接收字的节数
    remaining_size = total_size - recv_size

    if remaining_size >= 1024:
        # 每次接收的字节数
        recv_size += 1024
    # 获取接收的数据占总数据多少百分比
    else:
        recv_size += remaining_size
    percent = recv_size / total_size
    progress(percent)