我的python学习记录

基本结构

1. 编码指定: # -*- coding: UTF-8 -*-

2. 流程控制:

   1. 条件语句-if

   if x < 0:
       pass
   elif x == 0:
       pass
   else:
       pass
   

   2. 循环语句-for

   for i in range(5):
       pass
   

3. 数据结构:

       a = [22,33,44] //list
       a.insert(2,-1)
       a.append(55)
       a.index(22)
       a.remove(22)
       a.reverse()
       a.sort()
       a.pop()
       del a  //删除列表
       
       t = 1,2,3,'hello' //元组
       u = t,(1,2,3) //元组
       h = 'tt', //元组
       
       m = set('aaaabbbccc') //set
       
       d = {'t1':222, 't2': 333} //dict
       
       //循环dict
       for k, v in d.items():
           print(k,v)
           
       //循环列表
       for i, v in enumerate(['a','v','c']):
           print(i, v)
           
       //zip 循环两个序列 按照顺序取值
       q = ['name','age']
       an = ['mn','22']
       for q, a in zip(q, an):
           print(q, a)
   

4. main方法模板:

   if __name__ == "__main__":
       pass
   

5. 异常处理:

   try:
       
   except:
   
   else:
   
   finally:
   

6. 类模板:

   class Sample:
       """类文档说明"""
       i = 123 //类属性
       __private_name = 222 //私有变量    
       def __init__(self,name):
           self.name = name
       
       def f(self)://类方法
           return 'hello'