列表元组内置函数用法list

元组的用法和列表相似就不一一介绍了

1)def append(self, p_object):将值添加到列表的最后

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""" L.append(object) -- append object to end """

pass

(2)def count(self, value): 值的出现次数

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""" L.count(value) -> integer -- return number of occurrences of value """

return 0

(3)def extend(self, iterable): 扩展列表通过添加元素

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""" L.extend(iterable) -- extend list by appending elements from the iterable """

pass

(4)def index(self, value, start=None, stop=None): 返回第一次出现定义某只的下标

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"""

L.index(value, [start, [stop]]) -> integer -- return first index of value.

Raises ValueError if the value is not present.

"""

return 0

(5)def insert(self, index, p_object):指定下标插入元素

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""" L.insert(index, object) -- insert object before index """

pass

(6)def pop(self, index=None):删除并返回指定下标的值,如果没有指定下标最后一个返回

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"""

L.pop([index]) -> item -- remove and return item at index (default last).

Raises IndexError if list is empty or index is out of range.

"""

pass

(7)def remove(self, value): 移除列表中的指定值第一个

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"""

L.remove(value) -- remove first occurrence of value.

Raises ValueError if the value is not present.

"""

pass

(8)def reverse(self): 翻转

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""" L.reverse() -- reverse *IN PLACE* """

pass

(9)def sort(self, cmp=None, key=None, reverse=False):比较大小

数字按照大小比较

中文按照unicode比较

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"""

L.sort(cmp=None, key=None, reverse=False) -- stable sort *IN PLACE*;

cmp(x, y) -> -1, 0, 1

"""

pass

(10)def __add__(self, y): 加

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""" x.__add__(y) <==> x+y """

pass

(11)def __contains__(self, y):包含

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""" x.__contains__(y) <==> y in x """

pass

(12)def __delitem__(self, y): 删除单个序列元素

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""" x.__delitem__(y) <==> del x[y] """

pass

(13)def __delslice__(self, i, j): 删除序列片断

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"""

x.__delslice__(i, j) <==> del x[i:j]

Use of negative indices is not supported.

"""

pass

(14)def __eq__(self, y): 等于

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""" x.__eq__(y) <==> x==y """

pass

(15)def __getattribute__(self, name): 取属性;内建 getattr();总是被调用

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""" x.__getattribute__('name') <==> x.name """

pass

(16)def __getitem__(self, y): 得到单个序列元素

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""" x.__getitem__(y) <==> x[y] """

pass

(17)def __getslice__(self, i, j): 得到序列片断

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"""

x.__getslice__(i, j) <==> x[i:j]

Use of negative indices is not supported.

"""

pass

(18)def __ge__(self, y):大于等于

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""" x.__ge__(y) <==> x>=y """

pass

(19)def __gt__(self, y):大于

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""" x.__gt__(y) <==> x>y """

pass

(20)def __iadd__(self, y):

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""" x.__iadd__(y) <==> x+=y """

pass

(21)def __imul__(self, y):

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""" x.__imul__(y) <==> x*=y """

pass

(22)def __init__(self, seq=()): _init__方法在类的一个对象被建立时,马上运行

# known special case of list.__init__

"""

list() -> new empty list

list(iterable) -> new list initialized from iterable's items

# (copied from class doc)

"""

pass

(23)def __iter__(self): 创建迭代类;内建 iter()

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""" x.__iter__() <==> iter(x) """

pass

(24)def __len__(self): 序列中项的数目长度

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""" x.__len__() <==> len(x) """

pass

(25)def __le__(self, y):小于等于

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""" x.__le__(y) <==> x<=y """

pass

(26)def __lt__(self, y):小于

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""" x.__lt__(y) <==> x<y """

pass

(27)def __mul__(self, n): 重复;*操作符相乘

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""" x.__mul__(n) <==> x*n """

pass

@staticmethod # known case of __new__

(28)def __new__(S, *more) 构造器(带一些可选的参数) ;通常用在设置不变数据类型的子类。

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""" T.__new__(S, ...) -> a new object with type S, a subtype of T """

pass

(29)def __ne__(self, y):不等于

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""" x.__ne__(y) <==> x!=y """

pass

(30)def __repr__(self): 对机器友好

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""" x.__repr__() <==> repr(x) """

pass

(31)def __reversed__(self): 接受一个序列作为参数,返回一个以逆序访问的迭代器(PEP 322)

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""" L.__reversed__() -- return a reverse iterator over the list """

pass

(32)def __rmul__(self, n): 反向相乘

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""" x.__rmul__(n) <==> n*x """

pass

(33)def __setitem__(self, i, y): 设置单个序列元素

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""" x.__setitem__(i, y) <==> x[i]=y """

pass

(34)def __setslice__(self, i, j, y): 设置序列片断

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"""

x.__setslice__(i, j, y) <==> x[i:j]=y

Use of negative indices is not supported.

"""

pass

(35)def __sizeof__(self): 查看占用内存的函数

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""" L.__sizeof__() -- size of L in memory, in bytes """

pass

__hash__ = None

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