python-Sequence Common Method + * + = Extend Append method difference

+

Both sides are of the same sequence type. Stitching into a new sequence

Print ((1, 2, 3) + (4, 6)) print ("Beimenchuixue" + "Ximenchuifeng") print ([1, 2, 3] + [4, 5, 6])

*

Sequence type directly self-replicating how many times, * object is int type, support + sequence support * operation

Print ((1, 2, 3) * 3) print ("Beimenchuixue" * 3) print ([1, 2, 3] * 3)

　　

+=

In-place plus, both sides are sequence types, the latter can be iterated type added to the former data structure, if the former is a mutable type, or both are the same type of direct splicing.

numbers = [1, 2, 3]numbers + = ' sss ' Print (numbers) numbers + = (1, 2, 3) print (numbers)

　　

Append

Add the content as a whole object

numbers = [1, 2, 3]numbers.append ([3, 4]) print (numbers)

　　

Extend

Add the contents sequentially in order

numbers = [1, 2, 3]numbers.extend (' North Gate Blowing Snow ') print (numbers

　　

　　

python-Sequence Common Method + * + = Extend Append method difference