How to merge two lists in python

The method of merging lists in python is as follows:

Method 1

The most original and stupidest method is to Take out all the elements from a list and put them into a new list. The sample code is as follows:

list1 = [1,2,3]
list2 = [4,5,6]
list_new = []
for item in list1:
  list_new.append(item)
for item in list2:
  list_new.append(item)
print(list_new)

Method 2

A built-in function zip() in python is used here. Its function can be seen from the name. To come out is to package several originally unrelated contents together. Look at the code:

a = [1,2,3]
b = [4,5,6]
c = zip(a,b) //c = [(1,4),(2,5),(3,6)]
list_new = [row[i] for i in range(len(0)) for row in c]

This is python2 syntax

Method three

Use merge directly

a = [1,2,3]
b = [4,5,6]
c = a + b

Method 4

Use the append method

a = [1,2,3]
b = [4,5,6]
a.append(b)

Note: The append() method adds the b list as a whole to the a list, and the output result is

 [1, 2, 3, [4, 5, 6]]

The above is the detailed content of How to merge two lists in python. For more information, please follow other related articles on the PHP Chinese website!