How to remove duplicates from a python list?

How to remove duplicates from a python list? The following article will introduce to you how to remove duplicates from a python list. I hope it will be helpful to you. (Recommended learning: python video tutorial)

Python list deduplication method:

1. Use the loop search method

li = [1,2,3,3,4,2,3,4,5,6,1]
news_li = []
for i in li:
    if i not in news_li:
        news_li.append(i)
print (news_li)

Output:

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

2. Use the set feature set()

li = [1,4,3,3,4,2,3,4,5,6,1]
new_li = list(set(li))
print (new_li)

Output:

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

3. Use the grouby method of itertools module

import itertools
li = [1,4,3,3,4,2,3,4,5,6,1]
li.sort() #排序
it = itertools.groupby(li)
for k, g in it:
    print (k)

Output:

1
2
3
4
5
6

4. Use keys() method

li = [1,0,3,7,7,5]
formatli = list({}.fromkeys(li).keys())
print (formatli)

Output:

[1, 0, 3, 7, 5]

For more python related technical knowledge, please visit the python introductory tutorial column to learn!

The above is the detailed content of How to remove duplicates from a python list?. For more information, please follow other related articles on the PHP Chinese website!