3.30---time、random、sys、os 模块练习

1、检索文件夹大小

要求执行方式如下：

python3.8 run.py 文件夹

import os
import sys

def file_size(file_path):
    size = 0
    if not os.path.isdir(file_path):
        return
    file_list = os.listdir(file_path)
    for name in file_list:
        son_path = os.path.join(file_path, name)
        if os.path.isdir(son_path):
            size += file_size(son_path)
        # elif os.path.isfile(son_path):
        else:
            size += os.path.getsize(son_path)
    return size

file_path = sys.argv[1]
size_of_file = file_size(file_path)
print(size_of_file)

2、随机验证码

import random
# 随机验证码
def random_code(size=4):
    code = ""
    for i in range(size):
        alp_up = chr(random.randint(65,90))
        alp_low = chr(random.randint(97,122))
        num = str(random.randint(0,9))

        # 第二个列表weights=[]中存放各元素权重，k为选取次数.返回值为列表
        single_code = random.choices([alp_low,alp_up,num],weights=[1,1,2],k=2)
        code += single_code[0]
    return code

print(random_code())

3、模拟下载进度条

import time
def download():
    total = 50000
    speed = 1024
    acum = 0
    while acum < total:
        time.sleep(0.1)
        acum += speed

        percent = acum / total
        if percent > 1:
            percent = 1
        wide = int(percent*50)
        show_str = "#"*wide
        # 每次都覆盖前一次的打印结果，实现动态效果。percent*100显示加载百分比
        print("
[%-50s] %d%%" %(show_str,percent*100),end="")
        
download()

4、文本copy脚本

# 法一:
import sys
src_file = sys.argv[1]
dst_file = sys.argv[2]

with open(src_file,mode="rb") as f,
    open(dst_file,mode="wb") as f1:
    f1.write(f.read())
#====================================
# 法二：
import sys
import shutile
src_file = sys.argv[1]
dst_file = sys.argv[2]

shutil.copyfile(src_file, dst_file)