深入了解Python数据类型之列表

Python  /  管理员 发布于 7年前   183

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
•切片
•循环
•包含

listclass 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, *args, **kwargs): # real signature unknown    """ Return key in self. """    pass  def __delitem__(self, *args, **kwargs): # real signature unknown    """ Delete self[key]. """    pass  def __eq__(self, *args, **kwargs): # real signature unknown    """ Return self==value. """    pass  def __getattribute__(self, *args, **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, *args, **kwargs): # real signature unknown    """ Return self>=value. """    pass  def __gt__(self, *args, **kwargs): # real signature unknown    """ Return self>value. """    pass  def __iadd__(self, *args, **kwargs): # real signature unknown    """ Implement self+=value. """    pass  def __imul__(self, *args, **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, *args, **kwargs): # real signature unknown    """ Implement iter(self). """    pass  def __len__(self, *args, **kwargs): # real signature unknown    """ Return len(self). """    pass  def __le__(self, *args, **kwargs): # real signature unknown    """ Return self<=value. """    pass  def __lt__(self, *args, **kwargs): # real signature unknown    """ Return self<value. """    pass  def __mul__(self, *args, **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, *args, **kwargs): # real signature unknown    """ Return self!=value. """    pass  def __repr__(self, *args, **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, *args, **kwargs): # real signature unknown    """ Return self*value. """    pass  def __setitem__(self, *args, **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","suoning","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","suoning","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","suoning","nick"]print(name_list.index('nick')) #insert插入，往索引里面插入值name_list = ["zhangyanlin","suoning","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","suoning","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","suoning","nick"]name_list.remove('nick')print(name_list) #reverse反转name_list = ["zhangyanlin","suoning","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","suoning","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)

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