Open-Source Python Spreadsheet Editor Library

What is Openpyxl API?

Openpyxl is a powerful and versatile open-source Python library for working with Excel files. It allows you to read, write, and manipulate Excel spreadsheets in the popular XLSX format. With Openpyxl, you can create complex Excel documents, modify existing ones, and even extract data from Excel spreadsheets to perform data analysis. Its user-friendly API provides functionalities for formatting cells, creating charts, and managing worksheets, making it an ideal choice for Python developers looking to automate Excel-related tasks or integrate Excel file processing into their applications. Whether you're handling data analytics, reporting, or any Excel-based project, Openpyxl offers a comprehensive set of tools to streamline your workflow.

OpenpyXL API Features

Following are some of the main features of OpenpyXL API:

• Read and Write Excel Files: Openpyxl can read and write Excel files in the XLSX format, allowing you to handle data efficiently.
• Create and Modify Worksheets: You can create new worksheets, rename them, and modify existing ones, including adding and removing sheets.
• Cell Formatting: Openpyxl supports various cell formatting options, such as setting fonts, colors, borders, and number formats.
• Data Validation: You can add data validation to cells to restrict input values, such as dropdown lists or numerical ranges.
• Conditional Formatting: Openpyxl allows you to apply conditional formatting rules to cells, enabling dynamic styling based on cell values.
• Formulas and Functions: You can insert and evaluate Excel formulas and functions within your spreadsheets.
• Charts: The library supports creating various types of charts, including bar, line, pie, and scatter charts, directly within Excel files.
• Images: You can insert images into Excel worksheets, allowing for richer document content.
• Named Ranges: Openpyxl supports named ranges, enabling easy reference to specific cell ranges within your code.
• Merging and Unmerging Cells: You can merge and unmerge cells to create more complex spreadsheet layouts.
• Styles: The library provides a comprehensive styling system, allowing you to customize the appearance of cells and worksheets.
• Iterating Over Rows and Columns: Openpyxl offers efficient ways to iterate over rows and columns for data processing.
• Protection: You can set worksheet protection options, such as locking cells or preventing sheet edits.
• Handling Large Files: Openpyxl is designed to handle large Excel files efficiently, making it suitable for big data applications.

Supported File Formats by Openpyxl

Pyexcel-XLS supports the following file formats.

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Getting Started with Openpyxl

You can download the Openpyxl library from GitHub or using pip install command:

Installation

Installing Openpyxl is simple and can be done from terminal as shown below:

pip3 install Openpyxl

Openpyxl Python Code Examples

How to Read an XLSX File using Openpyxl?

To read an existing XLSX file, you can use the load_workbook function. Here’s a simple example:

How to Create Excel XLSX with Openpyxl?

Creating a new Excel XLSX file using Openpyxl is very easy. You can create a new workbook using the Workbook class, get access to its active sheet and set the values of its cells as shown in the following code sample.

How to Modify Existing XLSX file using Openpyxl?

Reading an exisitng XLSX file and modifying it using Openpyxl is very easy. You can load the workbook using the load_workbook method and then get access to its active sheet and cell to modify its contents. This is as shown in the following code sample.

Resources

Conclusion

Openpyxl is a comprehensive and powerful Python library for working with Excel files, offering extensive features for creating, modifying, and analyzing data in the XLSX format. With its user-friendly interface and robust functionality, it caters to a wide range of tasks, from simple data entry to complex spreadsheet manipulations. Openpyxl's support for cell formatting, charts, data validation, and more makes it a versatile tool for developers looking to automate Excel-related processes or integrate spreadsheet capabilities into their applications. Whether you're building data analysis tools, generating reports, or handling Excel files in any capacity, Openpyxl provides the flexibility and ease of use needed to streamline your workflow and enhance productivity.

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