Back ArrowExplore all kits

Concatenate Strings of a groupedBy Pandas Dataframe

share link

by Abdul Rawoof A R dot icon Updated: Feb 10, 2023

technology logo
technology logo

Solution Kit Solution Kit  

The function in pandas is used to group rows of a DataFrame based on the values in one or more columns. It returns a GroupBy object, a special type of DataFrame grouped by one or more columns. The GroupBy object can then perform various operations on the grouped data. 


In pandas, you can concatenate strings of a grouped DataFrame using the “apply()” function and a custom function that concatenates the strings. 

  • apply(): In pandas, the apply() function is used to apply a function to each element, row, or column of a DataFrame or a Series.  


You can use any other method to concatenate strings, like using “pd.Series.str.cat()” or “pd.Series.agg()” with a custom function that concatenates the strings. 

  • pd.Series.str.cat(): pd.Series.str.cat() is a pandas function that concatenates all elements in a Series of strings into a single string.  
  • pd.Series.agg(): pd.Series.agg() is a pandas function that applies one or multiple aggregation functions to a Series, returning the result in the form of a scalar or a Series, depending on the number of functions passed and the number of groups in the input. 


For more information about concatenating strings of a GroupedBy Pandas DataFrame, please look at the code below. 

Fig : Preview of the output that you will get on running this code from your IDE.

Code

In this solution we're using Pandas library.

Concatenate strings of a groupedBy pandas dataframe

PythondotLines of Code : 24dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
import pandas as pd

if __name__ == '__main__':
    df = pd.DataFrame([
        ['ABC', 'Order'],
        ['ABC', 'Address'],
        ['ABC', 'Zip'],
        ['XYZ', 'Customer'],
        ['XYZ', 'Name']
    ],
    columns=("Table", "Column"))

    pretty = pd.concat(
        (df['Table'],
        df.groupby("Table")['Column'].transform(lambda x: ", ".join(x))),
        axis=1
    ).drop_duplicates()

    for _, row in pretty.iterrows():
        print("Table '{}' has columns: {}".format(row['Table'], row['Column']))

Table 'ABC' has columns: Order, Address, Zip
Table 'XYZ' has columns: Customer, Name

Instructions

Follow the steps carefully to get the output easily.

  1. Install pandas on your IDE(Any of your favorite IDE).
  2. Copy the snippet using the 'copy' and paste it in your IDE.
  3. Add required dependencies and import them in Python file.
  4. Run the file to generate the output.


I hope you found this useful. I have added the link to dependent libraries, version information in the following sections.


I found this code snippet by searching for 'how to concatenate strings of a groupedBy pandas dataframe' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in PyCharm 2021.3.
  2. The solution is tested on Python 3.9.7.
  3. Pandas version-v1.5.2.


Using this solution, we are able to concatenate strings of a groupedby pandas dataframe with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to concatenate strings of a groupedby pandas dataframe.

Dependent Library

pandasby pandas-dev

Python doticonstar image 38689 doticonVersion:v2.0.2doticon
License: Permissive (BSD-3-Clause)

Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more

Support
    Quality
      Security
        License
          Reuse

            pandasby pandas-dev

            Python doticon star image 38689 doticonVersion:v2.0.2doticon License: Permissive (BSD-3-Clause)

            Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more
            Support
              Quality
                Security
                  License
                    Reuse

                      You can also search for any dependent libraries on kandi like 'pandas'.

                      Support

                      1. For any support on kandi solution kits, please use the chat
                      2. For further learning resources, visit the Open Weaver Community learning page.


                      See similar Kits and Libraries

                      Open Weaver – Develop Applications Faster with Open Source

                      kandi

                      Community and Support

                      Company

                      Follow

                      • © 2023 Open Weaver Inc.