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笨办法学Python - 习题11-12: Asking Questions & Prompting People

程序员文章站 2022-03-25 18:48:43
[TOC] 1、习题 11: 提问 学习目标: 了解人机交互场景,熟悉raw_input 的用法。 1、在 Python2.x 中 raw_input( ) 和 input( ),两个函数都存在,具体区别详情请参考 "习题5" ,其中区别为: raw_input( ) 将所有输入作为字符串看待,返回 ......

目录

1、习题 11: 提问

学习目标:了解人机交互场景,熟悉raw_input 的用法。

1、在 python2.x 中 raw_input( ) 和 input( ),两个函数都存在,具体区别详情请参考,其中区别为:

  • raw_input( ) 将所有输入作为字符串看待,返回字符串类型。
  • input( ) 只能接收“数字”的输入,在对待纯数字输入时具有自己的特性,它返回所输入的数字的类型( int, float )。

2、在 python3.x 中 raw_input( )input( ) 进行了整合,去除了 raw_input( ),仅保留了 input( ) 函数,其接收任意任性输入,将所有输入默认为字符串处理,并返回字符串类型。

习题十一中的练习代码是:

#! -*-coding=utf-8-*-

print("how old are you?"),
age = raw_input()

print "how tall are you?",
height = raw_input()

print "how much do you weigh?",
weight = raw_input()

print "so, you're %r old, %r tall and %r heavy." % (
age, height, weight)
c:\python27\python.exe d:/pythoncode/stupid_way_study/demo11/exer11-1.py
how old are you? 14
how tall are you? 34
how much do you weigh? 123
so, you're '14' old, '34' tall and '123' heavy.

process finished with exit code 0

上述代码有一个问题,就是每一个print 一句后面都有一个逗号,这是因为这样的话print 就不会输出新行符而结束这一行跑到下一行去了,具体详情用法请参考。

2、习题 12: 提示别人

学习目标:继续学习raw_input 的用法,了解怎么添加提示信息。

习题十二中的练习代码是:

age = raw_input("how old are you? ")

height = raw_input("how tall are you? ")

weight = raw_input("how much do you weigh? ")

print "so, you're %r old, %r tall and %r heavy." % (age, height, weight)

上述代码的运行结果为:

c:\python27\python.exe d:/pythoncode/stupid_way_study/demo11/exer11-1.py
how old are you? 23
how tall are you? 45
how much do you weigh? 123
so, you're '23' old, '45' tall and '123' heavy.

process finished with exit code 0

了解一下pydoc的用法:

d:\pythoncode\stupid_way_study\demo11>python -m pydoc exer11-1
how old are you? 12
how tall are you? 23
how much do you weigh? 123
so, you're '12' old, '23' tall and '123' heavy.
help on module exer11-1:

# 展示该文件具体内容
name
    exer11-1

file
    d:\pythoncode\stupid_way_study\demo11\exer11-1.py

description
    # print("how old are you?"),
    # age = raw_input()
    #
    # print "how tall are you?",
    # height = raw_input()
    #
    # print "how much do you weigh?",
    # weight = raw_input()
    #
    # print "so, you're %r old, %r tall and %r heavy." % (
    # age, height, weight)

data
    age = '12'
    height = '23'
    weight = '123'

pydoc是python自带的一个文档生成工具,使用pydoc可以很方便的查看类和方法结构

同时我们可以在本地开启端口,然后在浏览器端看源代码解释:

本地窗口使用命令python3 -m pydoc -p 1234 开启:

笨办法学Python - 习题11-12: Asking Questions &  Prompting People

浏览器端可直接访问开放的端口:

笨办法学Python - 习题11-12: Asking Questions &  Prompting People

当然还可以在命令行下直接查看某一模块的源代码:

使用命令:python3 -m pydoc os

笨办法学Python - 习题11-12: Asking Questions &  Prompting People

3、总结

这两题主要是学习了和计算机交互的函数raw_input() ,注意由于python2中input() 自身的原因会导致一些问题,所以一般在python2中只使用input(),然后学习了解pydoc的用法。

笨办法学Python - 习题11-12: Asking Questions &  Prompting People