笨办法学Python - 习题11-12

py3study

发布于 2020-02-10 23:04:51

7790

文章被收录于专栏：python3python3

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( )和 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习题7。

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：