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How to Change Strings to Uppercase in Pandas DataFrame

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by vsasikalabe dot icon Updated: Jan 31, 2023

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When you change one value to uppercase, you take a string and convert all its lowercase letters to uppercase letters. Changing a string value to uppercase can be useful in various situations. Some examples include:   

  • Consistency: If you have a dataset with mixed case values and want to ensure that all values are consistent for easier sorting or comparison.  
  • Display: If you are displaying text on a webpage or in a user interface, you can use uppercase for certain elements to make them stand out more.  
  • Parsing: Sometimes, the uppercase text is used in file formats or data structures to indicate a specific meaning or format.   
  • Searching: Sometimes, uppercase and lowercase characters are considered differently in searching algorithms or databases.  
  • Cryptography: Some cryptographic systems use uppercase letters in their encryption keys and algorithm.  


In Python, you can use the upper() method to change a string value to uppercase.  

  • upper(): The upper() method in Python converts all the characters in a string to uppercase.   


For better knowledge of changing one value to uppercase using Pandas in Python, you may have a look at the code below.  

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

Code

In this solution we used pandas library of python.

Pandas Df - Change one value to uppercase

PythondotLines of Code : 13dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
import pandas as pd
import numpy as np

df=pd.DataFrame({'col1': ['a','b','bb','cccc'], 'Ticker': ['aAAa','ZZzzz','c','CccC']})

df['Ticker'] = np.where(df.Ticker == 'ZZzzz', df.Ticker.str.upper(), df.Ticker)

      col1 Ticker
0     a   aAAa
1     b  ZZZZZ
2    bb      c
3  cccc   CccC

Instructions

Follow the steps carefully to get the output easily.

  1. Download and Install the PyCharm Community Edition on your computer.
  2. Install pandas and numpy on your IDE from python interpreter in setting options.
  3. Create new python file on your IDE.
  4. Copy the snippet using the 'copy' button and paste it in your python file.
  5. Run the current 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 ' Change one value to uppercase using Pandas in Python' 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 2022.3.
  2. The solution is tested on Python 3.11.1
  3. Pandas version-1.5.2.


Using this solution, we are able to Change one value to uppercase using Pandas in Python 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 Change one value to uppercase using Pandas in Python.

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
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            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

                      If you do not have pandas library that is required to run this code, you can install it by clicking on the above link.

                      You can search for any dependent library on kandi like pandas.

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