When combining DataFrames in Pandas, you have two primary options: merge() and concat(). While they both combine data, they work differently and serve different purposes. This guide explains when to use each method and provides practical examples to help you make the right choice for your data analysis tasks.
If your DataFrame includes columns containing lists or arrays, explode() is your go-to method to normalize this data into separate rows—ideal for analysis, filtering, and merging.
If you filter DataFrames with chained comparisons or boolean masks, you’ll love df.query(). It offers clean syntax, improved performance on complex filters, and supports inline variables. (more…)
Working with reshaped data in Pandas often boils down to two functions: pivot() and pivot_table(). Although they sound similar, they serve different purposes. This guide explains when and why to use each, with code examples and best-use scenarios.
If you’re working with reshaping data in Pandas, you’ve probably come across melt() and pivot(). They’re two powerful but opposite operations — and knowing when to use each is key to structuring your data efficiently. (more…)
Want faster Pandas code? Check below strategies to optimize performance, memory usage, and runtime when working with large or complex DataFrames in Python. (more…)
The error “module ‘pandas’ has no attribute ‘core'” usually arises from a version mismatch or a corrupted Pandas installation. The pandas.core module is an internal part of Pandas and shouldn’t be accessed directly in most cases. However, the error message indicates that Pandas is unable to find its own core components. Here’s a breakdown of how to troubleshoot and fix this: (more…)
Squashing bugs and speeding up your pandas code is like fine-tuning a race car: both satisfying and crucial for performance. Let’s get under the hood. (more…)
Structuring your Pandas projects effectively involves several key practices to ensure your code is clean, maintainable, and efficient. Here’s a summary of my experience I’d like to share: (more…)
The NotImplementedError in Pandas typically occurs when a feature or method that is being used is not implemented in the version of Pandas being used. This can happen when you are trying to use a new feature that has not been added to the version of Pandas you are using, or when you are using an older version of Pandas that does not support a feature that was added in a newer version.
To solve NotImplementedError in Pandas, you can try the following steps: (more…)