Pandas with Python 2.7 Part 10 - Function Mapping | Summary and Q&A

TL;DR

Learn how to use function mapping in pandas to perform custom operations on data that are not available as built-in functions.

Key Insights

• 👤 Function mapping in pandas enables users to perform custom operations that are not available as built-in functions.
• 👤 Users can define their own functions and apply them to dataframes or columns, enhancing flexibility in data analysis.
• 👻 Function mapping allows for efficient data processing, as it iterates through data in a generator-like form rather than a typical for loop.
• 😥 Custom functions can reference previous data points and utilize pandas' efficiency, combining the best of both worlds.
• 🐼 Function mapping is particularly useful when pandas does not have a specific operation needed for data analysis.
• 🤑 By using function mapping, users can still work with data in pandas and utilize its rich set of features after performing custom operations.
• 👻 Function mapping can handle multiple columns, allowing for complex operations across different data dimensions.

Transcript

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Questions & Answers

Q: What is function mapping in pandas?

Function mapping in pandas allows users to apply custom functions to dataframes or columns that are not available as built-in operations, ensuring flexibility in data analysis.

Q: How does function mapping work in pandas?

Users can define a custom function and pass the dataframe or columns as parameters to the function. The function is then mapped to the data, performing the operation row by row.

Q: Can function mapping handle multiple columns in pandas?

Yes, function mapping can handle multiple columns in pandas. Users can pass multiple columns as parameters to the custom function, allowing for complex operations across different columns.

Q: Does function mapping maintain the efficiency of pandas?

Function mapping still maintains the efficiency of pandas as it iterates through data in a generator-like form, ensuring optimal performance even for custom operations.

Summary & Key Takeaways

• Pandas offers several built-in operations, but there may be cases where a specific operation is not available.

• Function mapping allows users to define their own functions and apply them to pandas dataframes or columns.

• Function mapping is a powerful tool that enables users to leverage the efficiency of pandas while performing custom operations.