[python] Extract values in Pandas value_counts()

Say we have used pandas dataframe[column].value_counts() which outputs:

 apple   5 
 sausage 2
 banana  2
 cheese  1

How do you extract the values in the order same as shown above from max to min ?

e.g: [apple,sausage,banana,cheese]

This question is related to python pandas dataframe series

The answer is


The best way to extract the values is to just do the following

json.loads(dataframe[column].value_counts().to_json())

This returns a dictionary which you can use like any other dict. Using values or keys.

 {"apple": 5, "sausage": 2, "banana": 2, "cheese": 1}

First you have to sort the dataframe by the count column max to min if it's not sorted that way already. In your post, it is in the right order already but I will sort it anyways:

dataframe.sort_index(by='count', ascending=[False])
    col     count
0   apple   5
1   sausage 2
2   banana  2
3   cheese  1 

Then you can output the col column to a list:

dataframe['col'].tolist()
['apple', 'sausage', 'banana', 'cheese']

Code

train["label_Name"].value_counts().to_frame()

where : label_Name Mean column_name

result (my case) :-

0    29720 
1     2242 
Name: label, dtype: int64

#!/usr/bin/env python

import pandas as pd

# Make example dataframe
df = pd.DataFrame([(1, 'Germany'),
                   (2, 'France'),
                   (3, 'Indonesia'),
                   (4, 'France'),
                   (5, 'France'),
                   (6, 'Germany'),
                   (7, 'UK'),
                   ],
                  columns=['groupid', 'country'],
                  index=['a', 'b', 'c', 'd', 'e', 'f', 'g'])

# What you're looking for
values = df['country'].value_counts().keys().tolist()
counts = df['country'].value_counts().tolist()

Now, print(df['country'].value_counts()) gives:

France       3
Germany      2
UK           1
Indonesia    1

and print(values) gives:

['France', 'Germany', 'UK', 'Indonesia']

and print(counts) gives:

[3, 2, 1, 1]

If anyone missed it out in the comments, try this:

dataframe[column].value_counts().to_frame()

Examples related to python

programming a servo thru a barometer Is there a way to view two blocks of code from the same file simultaneously in Sublime Text? python variable NameError Why my regexp for hyphenated words doesn't work? Comparing a variable with a string python not working when redirecting from bash script is it possible to add colors to python output? Get Public URL for File - Google Cloud Storage - App Engine (Python) Real time face detection OpenCV, Python xlrd.biffh.XLRDError: Excel xlsx file; not supported Could not load dynamic library 'cudart64_101.dll' on tensorflow CPU-only installation

Examples related to pandas

xlrd.biffh.XLRDError: Excel xlsx file; not supported Pandas Merging 101 How to increase image size of pandas.DataFrame.plot in jupyter notebook? Trying to merge 2 dataframes but get ValueError Python Pandas User Warning: Sorting because non-concatenation axis is not aligned How to show all of columns name on pandas dataframe? Pandas/Python: Set value of one column based on value in another column Python Pandas - Find difference between two data frames Pandas get the most frequent values of a column Python convert object to float

Examples related to dataframe

Trying to merge 2 dataframes but get ValueError How to show all of columns name on pandas dataframe? Python Pandas - Find difference between two data frames Pandas get the most frequent values of a column Display all dataframe columns in a Jupyter Python Notebook How to convert column with string type to int form in pyspark data frame? Display/Print one column from a DataFrame of Series in Pandas Binning column with python pandas Selection with .loc in python Set value to an entire column of a pandas dataframe

Examples related to series

Display/Print one column from a DataFrame of Series in Pandas Python Pandas iterate over rows and access column names Extract values in Pandas value_counts() Convert pandas data frame to series Is it possible to append Series to rows of DataFrame without making a list first? assigning column names to a pandas series Convert pandas Series to DataFrame Get first element of Series without knowing the index Pandas: change data type of Series to String Conditional Replace Pandas