python（31）- 模块练习

1. 小程序：根据用户输入选择可以完成以下功能：
    创意文件，如果路径不存在，创建文件夹后再创建文件
    能够查看当前路径
    在当前目录及其所有子目录下查找文件名包含指定字符串的文件

import os
choice={
    "1":"创建文件",
    "2":"查看当前路径",
    "3":"查找文件名",
    "4":"退出程序"
}

def mkdir():
    file_path = input("please input your file_path:").strip()
    try:
        os.chdir(file_path)
        print("%s存在，不需要重新创建" % file_path)
    except:
        print("%s不存在，开始创建文件" % file_path)
        os.makedirs(file_path)
        print("%s创建完成" % file_path)

def check():
    file_name = input("please input your file_name:").strip()
    try:
        print("%s绝对路径为:%s"%(file_name,os.path.abspath(file_name)))
    except:
        print("%s不存在，开始创建文件" % file_name)

def search():
    file_dir = input("please input your file_dir:").strip()
    print("当前目录为：%s，子目录和所有文件为:%s" % (os.getcwd(), os.listdir(os.getcwd())))

while True:
    for key in choice:
        print(key,choice[key])
    num=int(input("please input your choice:").strip())

    if num==1:
       mkdir()

    elif num==2:
        check()

    elif num == 3:
        search()

    elif num==4:
        break

　　

2. 将三次登陆锁定的作业改为：python login.py -u alex -p 123456 输入的形式（-u,-p是固定的，分别代表用户名和密码）

#将三次登陆锁定的作业改为：
# python login.py -u alex -p 123456 输入的形式
# (-u,-p是固定的，分别代表用户名和密码)
import sys
if(sys.argv[sys.argv.index("-u")+1] == "egon" and sys.argv[sys.argv.index("-p")+1] == "somebody"  ):
    print("Congratulations")
else:
    print("Error")

#!/bin/python3
# -*- coding:utf-8 -*-
''' python login auth example  '''
#imports
import getpass,os,sys
#functions
def lock_user(username):
    ''' username -> modify userlist file '''
    temp_str = ""
    with open("userlist.swp",'w') as file_write , open("userlist",'r') as file_read:
        for line in file_read:
            temp_list = eval(line)
            if temp_list[0] == username:
                temp_list[2] += 1
                temp_str += str(temp_list)+"
"
                continue
            temp_str += line
        file_write.write(temp_str)
    os.rename("userlist.swp", "userlist")
def unlock_user(username):
    ''' username -> modify userlist file '''
    temp_str = ""
    with open("userlist.swp",'w') as file_write , open("userlist",'r') as file_read:
        for line in file_read:
            temp_list = eval(line)
            if temp_list[0] == username:
                temp_list[2] = 0
                temp_str += str(temp_list)+"
"
                continue
            temp_str += line
        file_write.write(temp_str)
    os.rename("userlist.swp", "userlist")
def user_input():
    ''' input username&&password -> return username&&password '''
    if not "-u" in sys.argv and not "-p" in sys.argv:
        print("help:
-u [username] -p [password]")
        exit()
    username = sys.argv[sys.argv.index("-u")+1]
    password = sys.argv[sys.argv.index("-p")+1]
    # username = input("username:")
    # password = getpass.getpass("password:")
    return username,password
def check_user(username,password = '',type = 'check'):
    '''
        username,password,check -> return t||f #username password lock check
        username,password,lock -> return  t||f #username locked or not
    '''
    flag = False
    with open("userlist",'r') as file_read:
        for line in file_read:
            temp_list = eval(line)
            if type == 'check': 
                if username == temp_list[0] and password == temp_list[1] 
                and temp_list[2] < 2:
                    return True #user not locked and correct user and pass
            if type == 'lock':
                if username == temp_list[0] and temp_list[2] >= 2:
                    return True #user has been locked

        else:
            return False
#login decorator
def auth(func):
    def wrapper(*args,**kwargs):
        username,password = user_input() #get input
        # if not username and not password:
        #   print("incorrect username or password!")
        #   exit()
        if check_user(username, password,type='check'): #juge username and password correct or not
            print("login success!")
            unlock_user(username)
            func(username) #shell function
        else:
            if check_user(username, password, type='lock'): #juge user locked or not
                print("This account has been locked!")
            else:
                lock_user(username) #lock count += 1
                print("incorrect username or password!")
    return wrapper
#shell function
@auth
def login_index(username = ""):
    ''' shell program '''
    while True:
        command = input("%s>" %username) #ask input command
        if command == 'ls':
            print(
'''
bin   dev  home  lib64       media  opt   root  sbin  sys  usr
boot  etc  lib   lost+found  mnt    proc  run   srv   tmp  var
''')
        if command == 'exit': #exit shell
            print("byebye!")
            exit()

def main():
    ''' main program '''
    login_index()

#program entry
if __name__ == '__main__':
    main()

　　

3. 层级结构：

    dir1
    ---hello.py

    dir2
    ---main.py

    其中，hello.py：

    def add(x,y):
         return x+y

　main.py如何能调用到hello.py中的add函数？

 参考博客结尾的内容，单独导入包。http://www.cnblogs.com/xuyaping/p/6797032.html

注：此题中导入的模块只是一个简单的模块，和博客中导入模块不同的是没有__init__文件，更简单些。

#main.py
import sys,os
sys.path.append("E:python学习day33常用模块作业dir1")
print(sys.path)
--->['E:\python学习\day33常用模块\作业\dir2', 'E:\python学习', 'C:\Users\Administrator.PC-201509301704\AppData\Local\Programs\Python\Python36\python36.zip', 'C:\Users\Administrator.PC-201509301704\AppData\Local\Programs\Python\Python36\DLLs', 'C:\Users\Administrator.PC-201509301704\AppData\Local\Programs\Python\Python36\lib', 'C:\Users\Administrator.PC-201509301704\AppData\Local\Programs\Python\Python36', 'C:\Users\Administrator.PC-201509301704\AppData\Local\Programs\Python\Python36\lib\site-packages', 'E:\python学习\day33常用模块\作业\dir1']

import hello
print(hello.add(1,2))
--->3

 

4. 显示当前时间三天后是星期几？

import time
c=time.localtime()
print(c)    #当前时间
--->time.struct_time(tm_year=2017, tm_mon=4, tm_mday=26, tm_hour=23, tm_min=40, tm_sec=54, tm_wday=2, tm_yday=116, tm_isdst=0)

t=time.time()-3600*24*3
print(time.localtime(t))
--->time.struct_time(tm_year=2017, tm_mon=4, tm_mday=23, tm_hour=23, tm_min=44, tm_sec=30, tm_wday=6, tm_yday=113, tm_isdst=0)

print(time.localtime(t).tm_wday)
--->6