条件、循环和其他语句

1. print、import
   • 使用逗号输出多个表达式

     >>> name="Gumby"
     >>> salutation="Mr."
     >>> greeting="Hello,"
     ##同时输出三个变量
     >>> print greeting + salutation + name
     Hello,Mr.Gumby # 普通输出，相邻两个变量之间有空格
     >>> print greeting, salutation, name
     Hello, Mr. Gumby # 逗号输出，相邻两个变量之间有空格
     >>> print "%s %s %s" % (greeting, salutation, name)
     Hello, Mr. Gumby # %格式化字符串输出，有无空格看""内如何定义
     ##解决空格问题
     >>> greeting="Hello"
     >>> print greeting , "," , salutation , name
     Hello , Mr. Gumby
     >>> print greeting + "," , salutation , name
     Hello, Mr. Gumby
     ##语句结尾处打逗号会去掉回车
     text.txt:
     print "Hello,",
     print "world"
     cmd:
     py text.txt
     Hello, world

   • 导入

     1. import somemodule
     2. from somemodule import somefunction
     3. from somemodule import somefunction, anotherfunction, yetanotherfunction
     4. from somemodule import *
     

     当导入的两个函数重名时，只导入模块，或者as设置别名

     ##
     module1.open()
     module2.open()
     
     ##
     from module1 import open as open1
     open1()
     from module2 import open as open2
     open2()

2. 赋值魔法
   • 1
3. 语句块：缩排的乐趣
   • 1
4. 条件和条件语句
   • 1
5. 循环
   • 1
6. 列表推导式-轻量级循环
   • 1
7. 三人行
   • 1

来源：https://www.cnblogs.com/Sakurar/p/11829550.html