Python学习_IDLE快捷键以及列表相关杂记

IDLE快捷键

Tab完成:键入部分代码,按下TAB键,IDLE将给出列表帮助完成语句

回退代码语句:按下Alt+P(Previous),可以回退到IDLE中之前输入的代码语句,

下一个代码语句:按下Alt+N(Next)可以移动至下一个代码语句

调整IDLE首选项:通过Options>Configure IDLE调整默认行为

 

列表:

列表末尾增加数据:list.append()

列表末尾删除数据:list.pop()

列表末尾增加数据项集合:list.extend()

列表中特定位置删除数据项:remove()

列表中特定位置增加数据项:insert()

>>>cast=["clee","palin","Idle"]
>>> cast.append("Gilliam")
>>> print cast
['clee', 'palin', 'Idle', 'Gilliam']
>>> cast.pop()
'Gilliam'
>>> print cast
['clee', 'palin', 'Idle']
>>> cast.extend(["Gilliam","Chapman"])
>>> cast
['clee', 'palin', 'Idle', 'Gilliam', 'Chapman']
>>> cast.remove("Chapman")
>>> print cast
['clee', 'palin', 'Idle', 'Gilliam']
>>> cast.insert(0,"Chapman")
>>> cast
['Chapman', 'clee', 'palin', 'Idle', 'Gilliam']

 

检查列表项本身是否为列表:isinstance()

>>> movies=["The Holy Grall","Terry Jones & Terry Gilliam",91,["Graham Chapman",["Michael Palin","John Cleese","Eric Idle"]]]
#循环方法输入所有列表项
>>> for item in movies:
    if isinstance(item,list):
        for inner_item in item:
            if isinstance(inner_item,list):
                for deep_item in inner_item:
                    print deep_item
            else:
                print inner_item
                
            
    else:
        print item

        
The Holy Grall
Terry Jones & Terry Gilliam
91
Graham Chapman
Michael Palin
John Cleese
Eric Idle
#定义迭代函数方法输入所有列表项
>>> def print_allitems(given_list):
    for item in given_list:
        if isinstance(item,list):
            print_allitems(item)
        else:
            print item

            
>>> print_allitems(movies)
The Holy Grall
Terry Jones & Terry Gilliam
91
Graham Chapman
Michael Palin
John Cleese
Eric Idle

 

返回当前作用域中定义的所有名的集合:locals()

if 'data' in locals():
    data.close()

 

posted @ 2014-05-21 10:11  AlwaysJane  阅读(705)  评论(0编辑  收藏  举报