python--list, dictionary, tuple, collection comparison

#概括: List dict tuple set display form, add, delete, modify compare
#list the form of a collection in order
List=[]
list=[1,2,3]
list2=[
("Name1", "Y1"),
("Name2", "Y2")
]
#----------------------------------------------------------------------
#dict dictionary form unordered, key and value
dict={}
dict={"name1": "Apple", "name2": "Egg"}
#----------------------------------------------------------------------
#tuple tuple form (tuple and list are very similar, but tuple cannot be modified once initialized, its nested list contents are variable)
#定义空
Tuple ()
#定义一个元素必须加 ","
tuple= (1,)
#----------------------------------------------------------------------
#set Set Form 1 unordered 2 null with () has value {} 3, the collection main function to repeat (for example, a list into a set form, the list of repeating elements remain unique)
Set1=set ()
set2={1,2,3}
#----------------------------------Add------------------------------------
#列表增加
list=[1,2,3]
#list Add one (trailing append)
List.append ("T5")
#list increased by two (specified position insertion)
List.insert (1, "T6")
#---------------------------------------------------------------------
#字典增加
dict={"name1": "Apple", "name2": "Egg"}
dict["Name3"]= "Orange"
#---------------------------------------------------------------------
#集合增加
set={"Apple", "egg"}
#set add one (one element)
Set.add ("Orange")
#set increased by two (n elements)
Set.update (["Test1", "test2"])


#----------------------------------Delete------------------------------------
#列表删除

list=[1,2,3,4,5,6,7]
#list Delete one (specified element) An error if the element does not exist
List.remove (2)
#list Delete Two (specify index 0 Delete first empty delete last) but collection Set.pop cannot specify 0
List.pop ()
#list Delete three (specified index)
Del List[1]

#---------------------------------------------------------------------
#字典删除

dict={"name1": "Apple", "name2": "Egg"}
#dict Delete one (specify key)
Del dict["Name1"]

#---------------------------------------------------------------------
#集合删除
set={"Apple", "egg", "egg1", "EGG2"}
#set Delete one (delete any element, because it is unordered, cannot specify an index, can only be empty)
Set.pop ()
#set Delete Two (delete the specified element) error if the element does not exist
#set. Remove ("egg")
#set Delete Three (delete the specified element) if the element does not exist and does not error
Set.discard ("Egg1")

#----------------------------------Modify------------------------------------
#列表修改
list=[6,7,8]
#list Modify One (Specify location modification)
list[2]= "T"
#---------------------------------------------------------------------
#字典修改
dict={"name1": "Apple", "name2": "Egg"}
dict["name2"]= "Orange"
#---------------------------------------------------------------------
#set Modification not found


#----------------------------------Output------------------------------------
#列表输出
list=[6,7,8]
#list method One: Direct output name
Print (list)
#方法二: Cyclic output name
For I in list:
Print (i)
#---------------------------------------------------------------------
#字典输出
dict={"name1": "Apple", "name2": "Egg"}
dict["name2"]= "Orange"

#dict method One: Direct output name
Print (DICT)
#方法二: Loop output name only output value
For I in Dict:
Print (Dict[i])
#---------------------------------------------------------------------
#集合输出
set={"Apple", "egg"}
Set.update (["777", "888"])
#dict method One: Direct output name
Print (set)
#方法二: Cyclic output name
For I in set:
Print (i)

python--list, dictionary, tuple, collection comparison