python merge got multiple values for argument how

Title: Understanding and Resolving "TypeError: merge() got multiple values for argument 'how'" in Python Pandas
Introduction:
When working with data manipulation tasks in Python using the Pandas library, you may encounter the "TypeError: merge() got multiple values for argument 'how'" error. This error typically occurs when attempting to merge DataFrames using the merge() function and specifying the merging criterion in multiple ways. In this tutorial, we'll explore the reasons behind this error and provide solutions to resolve it.
Error Message:
Causes of the Error:
The merge() function in Pandas allows you to combine two or more DataFrames based on a specified merging criterion. The error occurs when you provide conflicting values for the 'how' parameter, which determines the type of merge to be performed. This parameter can accept only one value, but if you unintentionally provide multiple values, the error is raised.
Solution:
To resolve the "TypeError: merge() got multiple values for argument 'how'" error, follow these steps:
Check 'how' Parameter:
Review Merging Criterion:
Avoid Using 'on', 'left_on', 'right_on' Together:
Example Code:
Conclusion:
Understanding the "TypeError: merge() got multiple values for argument 'how'" error is crucial for effective data manipulation using Pandas. By carefully reviewing your merge() function calls and ensuring consistent merging criteria, you can avoid this error and seamlessly merge your DataFrames.
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