2017-10-30 mac_python_open

open 只能打开.txt文件

with open('/Users/guohao/Desktop/hello.txt','r') as f:
    print(f.read())

 

 

mac显示桌面快捷键 command+F3

https://jingyan.baidu.com/article/915fc414f232e651394b202c.html

 

笔记：新买了一本爬虫书，前面是python的基础知识，复习了下，发现还有好多不会呀，IO编程，进程和线程，今天复习了这么多

#!/usr/bin/env python3
# -*-coding:utf-8 -*-
# Author:Uncle_guo
# IO 编程
# with open('/Users/guohao/Desktop/hello.txt',mode='r',encoding='utf-8') as f:
#     print(f.read())

# try:
#     f=open('/Users/guohao/Desktop/hello.txt','r')
#     print(f.read())
# finally:
#     if f:
#         f.close()
# with open('/Users/guohao/Desktop/hello.txt','r') as f:
#     for line in f.readlines():
#         print(line.strip().split())

# 序列化
#
# try:
#     import cPickle as pickle
# except ImportError:
#     import pickle
# d={'url':'index.html','http':'首页','content':'首页'}
# with open(r'/Users/guohao/Desktop/hello.txt','wb') as f:
#     pickle.dump(d,f)

# print(pickle.dumps(d))

# with open(r'/Users/guohao/Desktop/hello.txt','rb') as f:
#     d=pickle.load(f)
#     print(d)
# 多进程
# fork multiprocessing
# fork:getpid ,gettpid
# print(os.getpid())

#print(os.fork())#调用一次返回两次，子进程始终返回0，父进程返回子进程的ID
#getpid 获取当前进程ID，gettpid 获取父进程ID
# import os
# if __name__=='__main__':
#     print('父进程(%s)开始启动。。。'%(os.getpid()))
#     pid=os.fork()
#     if pid<0:
#         print('Error')
#     elif pid==0:
#         print('我是子进程(%s)，我的父进程是(%s)'%(os.getpid(),os.getppid()))
#     else:
#         print('我(%s)是(%s)的父进程'%(os.getpid(),pid))
# #%s
# name='Uncle_Guo'
# age=22
# study1='易语言'
# study2='Html'
# study3='Python'
# print('我的名字是(%s),今年(%s)岁，我学过(%s)、(%s)、(%s)'%(name,age,study1,study2,study3))