Python成长之路第二篇（2）_列表元组内置函数用法
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
# 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.
"""
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)
# real signature unknown; restored from __doc__
""" 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
# real signature unknown; restored from __doc__
"""
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
# real signature unknown; restored from __doc__
""" L.__sizeof__() -- size of L in memory, in bytes """
pass
__hash__ = None
