笨办法学Python记录--习题12-14 主要是pydoc用法,raw_input,argv

20140413 -- 习题12 - 14 

1. pydoc在windows的用法,必须进入到python安装目录,执行Python -m pydoc raw_input;

网上给出了一个好玩的,不过只能查到文档级别:在命令行到pydoc所在的目录python的安装目录lib下,运行 python pydoc.py -p 8877 ,其中8877是随便能用的端口即可。之后在IE中打开“http://127.0.0.1:8877/ 你会有意外惊喜。

查到的信息如下:

raw_input(...)
raw_input([prompt]) -> string

Read a string from standard input. The trailing newline is stripped.
If the user hits EOF (Unix: Ctl-D, Windows: Ctl-Z+Return), raise EOFError.
On Unix, GNU readline is used if enabled. The prompt string, if given,
is printed without a trailing newline before reading.

prompt译作提示,读取一个字符串,从标准输入中。紧接着是等待输入。如果用户使用了结束键,就抛出EOFError。在Unix,GNU被用到了,提示字符串事先被打印出来。

 

PS C:\Python27> python -m pydoc open
Help on built-in function open in module __builtin__:

open(...)
open(name[, mode[, buffering]]) -> file object

Open a file using the file() type, returns a file object. This is the
preferred way to open a file. See file.__doc__ for further information.

返回的是file对象。

 

2. argv ---相当于shell中的$参数,用法如下:

from sys import argv

参数1,参数2 = argv #之后参数的饮用就和这个先后顺序有关了

3. 配合raw_input使用argv效果不错,例如

from sys import argv

script,user_name = argv

prompt = '>'

print "My name is %s, and you know I am the %s script." %(user_name,script)

print "do u like me?"

like = raw_input(prompt)

print "how old r u?"

age = raw_input(prompt)

print """

OK, you said you %r me very much. you r %r years old.

""" %(like,age)

 

 

posted on 2014-04-13 16:30  麦兜布熊  阅读(5346)  评论(0编辑  收藏  举报