List:
increase:
append()
Extend () add more elements ## usage is a list of names . Function ()
delete:
pop () if there is no plus default parameter is the last element deleted if it is in accordance with the given parameters pruning index ## can not directly know what you want to deletion of the elements
The Remove () : can directly select the name you want to remove the element
# Cycle time can not remove
# Because each remove one, Wang Qianmian list will move, it will change the index, so when you want to delete the list in a loop, how many more records list a list of elements to be deleted, and then delete the original list
Del list [] ## This can only use the index back
Clear () ## Clear List
change:
' List name ' [] = 'xxx' # to modify the contents # index slices, a slice may also modify the parameter list that follows the name of a plurality of three
Query: for variable in list name
A list of common operations:
Len () ## built-in function may also be usable with other strings
Count () ## Calculation example: calculating a list of a number of written a.count (1) count function of only one parameter
Sort () ## default ascending Sort ( Reverse = ture ) Reverse # in an inverted sense, can also be used directly in Example list: lst.reverse ()
Nested list:
I.e., there is also a list of list: Example a = [1, sir, [ 1,2, [3]], 6] When looking for . 3 can enter the A [2] [2] , when looking sir in r You may enter a [1] [2] # referred dimensionality reduction operation