/Python/Count unique elements in list python

Count unique elements in list python

Python count number of unique elements in a list

# Basic syntax:
len(set(my_list))
# By definition, sets only contain unique elements, so when the list
# is converted to a set all duplicates are removed. 

# Example usage:
my_list = ['so', 'so', 'so', 'many', 'duplicated', 'words']
len(set(my_list))
--> 4

# Note, list(set(my_list)) is a useful way to return a list containing
#	only the unique elements in my_list

Source: stackoverflow.com

How to find unique values in list in python

mylist = ['nowplaying', 'PBS', 'PBS', 'nowplaying', 'job', 'debate', 'thenandnow']
myset = set(mylist)
print(myset)

Source: stackoverflow.com

Count unique elements in list python

from collections import Counter

words = ['a', 'b', 'c', 'a']

Counter(words).keys() # equals to list(set(words))
Counter(words).values() # counts the elements' frequency

Source: stackoverflow.com

Count unique values in python

aa="XXYYYSBAA"
bb=dict(zip(list(aa),[list(aa).count(i) for i in list(aa)]))
print(bb)
# output:
# {'X': 2, 'Y': 3, 'S': 1, 'B': 1, 'A': 2}

-1

Source: stackoverflow.com

Similar codes

0 vote348 views1 answer
Increment numper in python
Python
0 vote286 views1 answer
Remover espaços string python
Python
1 vote298 views2 answers
Convert string representation of dict to dict python
Python
0 vote323 views1 answer
Smtplib send caleneder email
Python
1 vote284 views1 answer
New working version of linkchecker
Python
2 votes300 views1 answer
Sorting rows and columns in pandas
Python
1 vote315 views1 answer
Python add current directory to import path
Python
15 votes292 views6 answers
How to append list in python
Python
0 vote309 views1 answer
How to fix invalid salt in python flask
Python
10 votes289 views1 answer
How to get specific row in pandas
Python