Python 学习笔记二

多行字符串‘’‘...'''前面加r使用的作用是禁止字符串转义。

例子：

print("sadsad\\n")

sadsad\n

print(r"sadsad\\\n")

sadsad\\\n

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

Python3 基础：条件判断句

在代码的开头一定要标注运行环境和“代码编号”！

#!/usr/bin/env python#coding:utf-8age = input('Please write your age:')if age >= 18:print("adult")elif age <= 17:print("teenager")else:print("kind")

在编写上述代码中遇到PEP 263问题，查看官档解决办法如下：

To define a source code encoding, a magic comment must be placed into the source files either as first or second line in the file, such as:

# coding=<encoding name>

or (using formats recognized by popular editors):

#!/usr/bin/python# -*- coding: <encoding name> -*-

or:

#!/usr/bin/python# vim: set fileencoding=<encoding name> :