深入了解Python数据类型之列表
发布时间:2020-12-16 20:34:48 所属栏目:Python 来源:网络整理
导读:一.基本数据类型 整数:int 字符串:str(注:t等于一个tab键) 布尔值: bool 列表:list (元素的集合) 列表用[] 元祖:tuple 元祖用() 字典:dict 注:所有的数据类型都存在想对应的类列里 二.列表所有数据类型: 基本操作: 索引 切片 追加 删除 长度
一.基本数据类型 整数:int 二.列表所有数据类型: 基本操作: •索引 list class list(object): """ list() -> new empty list list(iterable) -> new list initialized from iterable's items """ def append(self,p_object): # real signature unknown; restored from __doc__ """ L.append(object) -> None -- append object to end """ (L.append(对象)- >――没有一个对象附加到结束) pass def clear(self): # real signature unknown; restored from __doc__ """ L.clear() -> None -- remove all items from L """ (L.clear()- >没有,把所有项目从L) pass def copy(self): # real signature unknown; restored from __doc__ """ L.copy() -> list -- a shallow copy of L """ (L.copy()- >列表- L的浅拷贝) return [] def count(self,value): # real signature unknown; restored from __doc__ """ L.count(value) -> integer -- return number of occurrences of value """ (L.count(价值)- >整数,返回值的出现次数) return 0 def extend(self,iterable): # real signature unknown; restored from __doc__ """ L.extend(iterable) -> None -- extend list by appending elements from the iterable """ (L.extend(iterable)- >没有――从iterable扩展列表通过添加元) pass def index(self,value,start=None,stop=None): # real signature unknown; restored from __doc__ """ L.index(value,[start,[stop]]) -> integer -- return first index of value. Raises ValueError if the value is not present. (l指数(价值,[开始,[不要]])- >整数,返回第一索引值。提出了ValueError如果不存在的价值。) """ return 0 def insert(self,index,p_object): # real signature unknown; restored from __doc__ """ L.insert(index,object) -- insert object before index """ (l插入(指数(对象)――前插入对象索引) pass def pop(self,index=None): # real signature unknown; restored from __doc__ """ L.pop([index]) -> item -- remove and return item at index (default last). Raises IndexError if list is empty or index is out of range. (L.pop((指数))- >项目――删除并返回项指数(默认)。提出了IndexError如果列表为空或索引的范围。) """ pass def remove(self,value): # real signature unknown; restored from __doc__ """ L.remove(value) -> None -- remove first occurrence of value. Raises ValueError if the value is not present. """ (L.remove(价值)- >没有,删除第一次出现的值。提出了ValueError如果不存在的价值。) pass def reverse(self): # real signature unknown; restored from __doc__ """ L.reverse() -- reverse *IN PLACE* """ pass def sort(self,key=None,reverse=False): # real signature unknown; restored from __doc__ """ L.sort(key=None,reverse=False) -> None -- stable sort *IN PLACE* """ pass def __add__(self,*args,**kwargs): # real signature unknown """ Return self+value. """ pass def __contains__(self,**kwargs): # real signature unknown """ Return key in self. """ pass def __delitem__(self,**kwargs): # real signature unknown """ Delete self[key]. """ pass def __eq__(self,**kwargs): # real signature unknown """ Return self==value. """ pass def __getattribute__(self,**kwargs): # real signature unknown """ Return getattr(self,name). """ pass def __getitem__(self,y): # real signature unknown; restored from __doc__ """ x.__getitem__(y) <==> x[y] """ pass def __ge__(self,**kwargs): # real signature unknown """ Return self>=value. """ pass def __gt__(self,**kwargs): # real signature unknown """ Return self>value. """ pass def __iadd__(self,**kwargs): # real signature unknown """ Implement self+=value. """ pass def __imul__(self,**kwargs): # real signature unknown """ Implement self*=value. """ pass def __init__(self,seq=()): # known special case of list.__init__ """ list() -> new empty list list(iterable) -> new list initialized from iterable's items # (copied from class doc) """ pass def __iter__(self,**kwargs): # real signature unknown """ Implement iter(self). """ pass def __len__(self,**kwargs): # real signature unknown """ Return len(self). """ pass def __le__(self,**kwargs): # real signature unknown """ Return self<=value. """ pass def __lt__(self,**kwargs): # real signature unknown """ Return self<value. """ pass def __mul__(self,**kwargs): # real signature unknown """ Return self*value.n """ pass @staticmethod # known case of __new__ def __new__(*args,**kwargs): # real signature unknown """ Create and return a new object. See help(type) for accurate signature. """ pass def __ne__(self,**kwargs): # real signature unknown """ Return self!=value. """ pass def __repr__(self,**kwargs): # real signature unknown """ Return repr(self). """ pass def __reversed__(self): # real signature unknown; restored from __doc__ """ L.__reversed__() -- return a reverse iterator over the list """ pass def __rmul__(self,**kwargs): # real signature unknown """ Return self*value. """ pass def __setitem__(self,**kwargs): # real signature unknown """ Set self[key] to value. """ pass def __sizeof__(self): # real signature unknown; restored from __doc__ """ L.__sizeof__() -- size of L in memory,in bytes """ pass __hash__ = None 三.所有列表数据类型举例 #!/usr/bin/env python # -*- coding:utf-8 -*- #append追加 name_list = ["zhangyanlin","suoning","nick"] name_list.append('zhang') print(name_list) #count制定字符出现几次 name_list = ["zhangyanlin","nick"] name_list.append('zhang') name_list.append('zhang') name_list.append('zhang') print(name_list.count('zhang')) #extend可扩展,批量往里加数据 name_list = ["zhangyanlin","nick"] name = ["aylin","zhang","yan","lin"] name_list.extend(name) print(name_list) #index找到字符所在的位置 name_list = ["zhangyanlin","nick"] print(name_list.index('nick')) #insert插入,往索引里面插入值 name_list = ["zhangyanlin","nick"] name_list.insert(1,"zhang") print(name_list) #pop在原列表中移除掉最后一个元素,并赋值给另一个变量 name_list = ["zhangyanlin","nick"] name = name_list.pop() print(name) #remove移除,只移除从左边找到的第一个 name_list = ["zhangyanlin","nick"] name_list.remove('nick') print(name_list) #reverse反转 name_list = ["zhangyanlin","nick"] name_list.reverse() print(name_list) #del删除其中元素,删除1到3之间的 name_list = ["zhangyanlin","nick"] del name_list[1:3] print(name_list) 四.索引 name_list = ["zhangyanlin","suoning""aylin""nick"] print(name_list[0]) 五.切片 name_list = ["zhangyanlin","suoning""aylin""nick"] print(name_list[0:2]) 六.总长度len name_list = ["zhangyanlin","suoning""aylin""nick"] print(name_list[1:len(name_list)]) 七.for循环 name_list = ["zhangyanlin","suoning""aylin""nick"] for i in name_list: print(i) 以上就是小编为大家带来的深入了解Python数据类型之列表全部内容了,希望大家多多支持编程小技巧~ (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |