本人很喜欢Python代码,在工作中也很喜欢总结关于Python代码的经验教训,下面就这个问题来详细说一般在定义类和函数头时,Python代码的实际应用方面的介绍,希望大家浏览以下文章会有所收获。
字符串——单引号和双引号的作用相同(与perl不同)
- perl -p -i -e 's/old/new/g' filename
引号指示一个多行字符串,一般在定义类和函数头时做解释说明。
Python代码
- #!/usr/bin/python
- #Filename:mymodule.py
- class myModule:
- """show
- this is only one simple example"""
- pass
- p = myModule()
- print p
- #!/usr/bin/python
- #Filename:mymodule.py
- class myModule:
- """show
- this is only one simple example"""
- pass
- p = myModule()
- print p
python的变量:使用变量时只需要赋值,不需要声明或定义数据类型。
python内置的三种数据结构:
list、tple和dict。
一、list常用的几种方法:
- append,count,extend,index,insert,pop,remove,reverse,sort
展示list用法的简单例子:
Python代码
- #!/usr/bin/python
- #Filename:using_list.py
- shoplist =['apple','mango','carrot','banana']
- print 'I have',len(shoplist),'items to purchase.'
- print 'These items are:'
- for item in shoplist:
- print item,
- print '\nI also have to buy rice.'
- shoplist.append('rice')
- print 'My shopping list is now',shoplist
- print 'I will sort my list now'
- shoplist.sort()
- print 'Sorted shopping list is ',shoplist
- print 'The first item I will buy is ',shoplist[0]
- olditem = shoplist[0]
- del shoplist[0]
- print 'I bought the',olditem
- print 'My shopping list is now',shoplist
- #!/usr/bin/python
- #Filename:using_list.py
- shoplist =['apple','mango','carrot','banana']
- print 'I have',len(shoplist),'items to purchase.'
- print 'These items are:'
- for item in shoplist:
- print item,
- print '\nI also have to buy rice.'
- shoplist.append('rice')
- print 'My shopping list is now',shoplist
- print 'I will sort my list now'
- shoplist.sort()
- print 'Sorted shopping list is ',shoplist
- print 'The first item I will buy is ',shoplist[0]
- olditem = shoplist[0]
- del shoplist[0]
- print 'I bought the',olditem
- print 'My shopping list is now',shoplist
二、tuple与list十分相似,只是tuple和字符串一样是不可变序列。元素间用逗号分隔,为了便于识别一般会在tuple起始和结束位置加括号。
元组最通常的用法是用在打印语句中。
Python代码
- #!/usr/bin/python
- #Filename:print_tuple.py
- age = 26
- name = 'SongYang'
- print '%s is %d years old.' %(name,age)
- print '''''%s loves that girl who he is missing.
- Why is %s playing with that python?''' % (name,name)
- #!/usr/bin/python
- #Filename:print_tuple.py
- age = 26
- name = 'SongYang'
- print '%s is %d years old.' %(name,age)
- print '''%s loves that girl who he is missing.
- Why is %s playing with that python?''' % (name,name)
Python代码有很多值得学习的地方,这里我们主要介绍Python代码 ,包括介绍实际应用方面的介绍。
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