info = '''

 --------------------info of %s----------------

 name: %s

 age: %s

 job: %s

 ------------------------------------------

 ''' % (name,name,age,job)

 print(info)

 info2 = '''

 --------------------info2 of {_name}----------------

 name: {_name}

 age: {_age}

 job: {_job}

 ------------------------------------------

 ''' .format(_name = name,

             _age = age,

             _job = job

 )

 print(info2)

 #!/usr/bin/env python

 # -*- coding: utf-8 -*-

 import getpass

 # 将用户输入的内容赋值给 name 变量

 pwd = getpass.getpass("请输入密码：")

 # 打印输入的内容

 print(pwd)

 password = getpass.getpass("input your password\n:>>>").strip()

 Old: print "The answer is", 2*2 New: print("The answer is", 2*2)

 Old: print x, # Trailing comma suppresses newline New: print(x, end=" ") # Appends a space instead of a newline

 Old: print # Prints a newline

 New: print() # You must call the function!

 Old: print >>sys.stderr, "fatal error" New: print("fatal error", file=sys.stderr)

 Old: print (x, y) # prints repr((x, y))

 New: print((x, y)) # Not the same as print(x, y)!

 #!/usr/bin/env python

 # python startup file

 import sys

 import readline

 import rlcompleter

 import atexit

 import os

 # tab completion

 readline.parse_and_bind('tab: complete')

 # history file

 histfile = os.path.join(os.environ['HOME'], '.pythonhistory')

 try:

     readline.read_history_file(histfile)

 except IOError:

     pass

 atexit.register(readline.write_history_file, histfile)

 del os, histfile, readline, rlcompleter

 for Linux

 ocalhost:~ jieli$ python

 Python 2.7.10 (default, Oct 23 2015, 18:05:06)

 [GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)] on darwin

 Type "help", "copyright", "credits" or "license" for more information.

 >>> import tab

 for i in range(0,10,2):

     if i <5:

         print("loop",i)

     else:

         continue

     print("hehe")

 通过readline输出，对于比较大的文件，这种占用内存比较小。

 #coding:utf-8

 f = open('poem.txt','r')

 result = list()

 for line in open('poem.txt'):

     line = f.readline()

     print line

     result.append(line)

 print result

 f.close()

 open('result-readline.txt', 'w').write('%s' % '\n'.join(result))

 #coding:utf-8

 '''cdays-4-exercise-6.py 文件基本操作

     @note: 文件读取写入, 列表排序, 字符串操作

     @see: 字符串各方法可参考hekp(str)或Python在线文档http://docs.python.org/lib/string-methods.html

 '''

 f = open('cdays-4-test.txt', 'r')                   #以读方式打开文件

 result = list()

 for line in f.readlines():                          #依次读取每行

     line = line.strip()                             #去掉每行头尾空白

     if not len(line) or line.startswith('#'):       #判断是否是空行或注释行

         continue                                    #是的话，跳过不处理

     result.append(line)                             #保存

 result.sort()                                       #排序结果

 print result

 open('cdays-4-result.txt', 'w').write('%s' % '\n'.join(result)) #保存入结果文件