Python

• 定义变量

直接定义

a=1

b=2

a+b

定义函数

def hello():

   print "hello world!"

def max(a,b):

   if a>b:

      return a

   else:

      return b

hello()

print(max(8,6))

循环

for i in range(0,100):

print("Item{0},{1}".format(i,"hello,world!"))

此处的{0},{1}，作为占位符号，把后面format之后的数据进行输入。

面向对象--定义类

Example1:

class hello:

   def __init__(self,name):   ***此处的self,name是怎么个意思？

       self._name = name

   def sayhello(self):

       print("hello {0}".format(self._name))

h = hello("coin")

h.sayhello()

example2:

class hello:

   def __init__(self,name):

     self._name = name

   def sayhello(self):

       print("hello {0}".format(self._name))

class Hi(hello):

#此处使用赋类的方法

   def __init__(self,name):

     hello.__init__(self,name)

   def sayHi(self):

       print ("Hi {0}i".format(self._name))

h = hello("coin")

h.sayhello()

hi = Hi("zhangsan")

hi.sayHi()

本文出自 “NB小菜鸟” 博客，谢绝转载！

python学习