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Create pandas Dataframe with unique Index.

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by vigneshchennai74 dot icon Updated: Feb 24, 2023

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Creating a Pandas DataFrame with a unique index can provide several benefits, including: 

  • Uniqueness: A unique index ensures that a unique label can identify each row in the DataFrame. This helps avoid issues when dealing with duplicate rows or merging data from multiple sources. 
  • Data Integrity: By using a unique index, you can help maintain the integrity of your data. This can make performing operations such as filtering, sorting, and aggregating data easier without affecting the underlying data structure. 
  • Efficiency: Using a unique index can make certain operations more efficient when working with large datasets. For example, when performing joins or merges between dataframes, using a unique index can speed up the process by allowing the data to be aligned more quickly. 


In Python, NumPy is a library for numerical computing. It provides a powerful N-dimensional array object, as well as a variety of functions for performing mathematical operations on arrays. NumPy arrays are efficient and fast and can be used for various data analysis tasks, such as filtering, sorting, and aggregating data. Pandas are created on top of NumPy, providing a higher-level Python interface for data manipulation and analysis. The append() method is used to add rows of data to an existing DataFrame. The append() method returns a new DataFrame with the rows from the original DataFrame and the appended rows.  


Creating a Pandas DataFrame with a unique index can help ensure data integrity, improve efficiency, and make data analysis and manipulation easier and more intuitive. 

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

Code

In this solution we have used append() function of python.

create Pandas Dataframe with unique index

PythondotLines of Code : 17dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
import numpy as np
import pandas as pd

df = pd.DataFrame(np.arange(12).reshape(3,4), columns=list('ABCD'))
dup_row = pd.DataFrame([[10,20,30,40]], columns=list('ABCD'), index=[1])
new_row = pd.DataFrame([[10,20,30,40]], columns=list('ABCD'), index=[9])

df.append(new_row, verify_integrity=True)
#     A   B   C   D
# 0   0   1   2   3
# 1   4   5   6   7
# 2   8   9  10  11
# 9  10  20  30  40

df.append(dup_row, verify_integrity=True)
# ValueError: Indexes have overlapping values: [1]
  1. Copy this code using "Copy" button above and paste it in your Python ide
  2. Import Pandas and Numpy library of python.
  3. Run the code to get a unique index.


I hope you have found this useful. I have added the dependent library and version information in the following section.


I found this code snippet by searching "Create pandas dataFrame with unique index" in kandi. you can try any use case.

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

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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 that is required to run this code you can install it by clicking on th above link and copying the pip install command from the pandas page in Kandi. You can search for any dependent library in Kandi like Pandas.

                      Environment Test

                      In this solution we have used the following versions. Be mindful to change when working with other versions.


                      1. This solution is created using Python version 3.7.15
                      2. This solution is Tested using Pandas 1.5.2


                      Using this solution we can able to Create a dataframe with a unique Index using Pandas library in python with simple Steps. This process also facilities an easy to use, hassle free method to create a hands-on working version of code which would help us create a Dataframe with unique Index in Python.

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