Python day2 list Tuple dictionary string

List

#列表事例

>>> li = List ((1,2,3,4,5))
>>> Print Li
[1, 2, 3, 4, 5]

>>> li2 = [' A ', ' B ', ' C ', ' d ']
>>> Print Li2
[' A ', ' B ', ' C ', ' d ']
>>>

#列表尾部增加元素
>>> Li.append (6)
>>> Li
[1, 2, 3, 4, 5, 6]

#清空列表内的元素, suitable for py3
Li.clear ()
Print (LI)
[]

#列表的拷贝 (in-depth copy) (ignored)
Li = [1,2,3,4,]
Li3 = Li.copy ()
Li3.append (678,)
Print (LI)
Print (LI3)
liid = ID (li)
LIID3 = ID (li3)
Print (LIID,LIID3)

[1, 2, 3, 4]
[1, 2, 3, 4, 678]
35707080 35737992

#extend合并两个列表或者把列表和元组合并
>>> Li.extend ([up])
>>> Li
[1, 2, 3, 4, 5, 6, 1, 2]

#count判断某个元素出现的次数
>>> Li.count (1)
2

#index获取列表内元素的索引下表
>>> Li.index (6)
5

#insert指定下标, inserting elements
>>> Li.insert (2, ' abc ')
>>> Li
[1, 2, ' abc ', 3, 4, 5, 6, 1, 2]

#pop移除某一项, add subscript
>>> Li
[1, 2, ' abc ', 3, 4, 5, 6, 1, 2]
>>> res = Li.pop (3)
>>> Print Res
3
>>> Print Li
[1, 2, ' abc ', 4, 5, 6, 1, 2]

#remove删除--pop value, Pop is added subscript
>>> li.remove (' abc ')
>>> Li
[1, 2, 4, 5, 6, 1, 2]

#reverse反向排序
>>> Li
[1, 2, 4, 5, 6, 1, 2]
>>> Li.reverse ()
>>> Li
[2, 1, 6, 5, 4, 2, 1]

#sort排序
>>> Li
[2, 1, 6, 5, 4, 2, 1]
>>> Li.sort ()
>>> Li
[1, 1, 2, 2, 4, 5, 6]
>>>

English introduction

classList (object):"""list (), New empty list List (iterable), new list initialized from iterable ' s items"""    defAppend (self, p_object):#real signature unknown; restored from __doc__        """L.append (object), None--Append object to end"""        Pass    defClear (self):#real signature unknown; restored from __doc__        """l.clear (), None--Remove all items from L"""        Pass    defCopy (self):#real signature unknown; restored from __doc__        """l.copy () List--a shallow copy of L"""        return []    defCount (self, value):#real signature unknown; restored from __doc__        """L.count (value), integer--return number of occurrences of value"""        return0defExtend (self, iterable):#real signature unknown; restored from __doc__        """L.extend (iterable), None--extend list by appending elements from the iterable"""        Pass    defIndex (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. """        return0defInsert (self, Index, p_object):#real signature unknown; restored from __doc__        """L.insert (Index, object)--Insert object before index"""        Pass    defPop (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 an empty or index is out of range. """        Pass    defRemove (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. """        Pass    defReverse (self):#real signature unknown; restored from __doc__        """L.reverse ()--Reverse *in place*"""        Pass    defSort (self, key=none, reverse=false):#real signature unknown; restored from __doc__        """L.sort (Key=none, Reverse=false), None--stable sort *in place*"""        Pass

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Dictionary

Tomorrow continued ~ ~

Python day2 list Tuple dictionary string