introduction
In the fields of data analytics and automated offices, Python is popular for its concise syntax and powerful library support. Especially when it comes to processing Excel files, Python provides a variety of libraries to simplify this process, with openpyxl being a feature-rich library for reading and writing Excel 2010 xlsx/xlsm/xltx/xltm files.
1. Python and Excel processing
Python processing Excel files usually involves the following steps:
- Read Excel files
- Select a worksheet
- Operational data (such as reading, writing, modifying)
- Save changes
2. Install the openpyxl library
Before you start, make sure that the openpyxl library is installed in your Python environment. If it has not been installed, you can install it through the pip command:
pip install openpyxl
3. Write code to get the number of lines
Next, we will write a Python script to get the number of lines of an Excel file. First, we need to import the load_workbook function in the openpyxl library, which is used to load the Excel workbook with the specified path.
from openpyxl import load_workbook
Then, specify the path to the Excel file we want to operate on:
excel_path = 'test_01.xlsx'
Use the load_workbook function to load the workbook and use the filename parameter to pass into the file path:
workbook = load_workbook(filename=excel_path)
By default, load_workbook loads the first worksheet of the Excel file. If you need to select another worksheet, you can use the sheetname parameter to specify the worksheet name. Here we use the default settings and get the active worksheet:
sheet =
To get the number of rows of a worksheet, we can use the max_row attribute. This property returns the maximum number of rows in the worksheet:
row_count = sheet.max_row
Finally, we can print out the number of lines of the Excel file:
print(f'Excel file has {row_count} rows.')
4. Code parsing
The above code snippet shows how to use the Python and openpyxl libraries to get the number of lines of an Excel file. The code is concise and clear and easy to understand. The key steps here are:
- use
load_workbookLoad the workbook. - pass
Get the currently active worksheet. - use
sheet.max_rowGets the maximum number of rows for the worksheet.
5. Extend the application
Although this article mainly introduces how to get the number of lines of an Excel file, the openpyxl library has much more than that. You can use it to:
- Read and write cell data.
- Manipulate cell styles, such as fonts, colors, borders, etc.
- Process multiple worksheets.
- Perform conditional filtering and sorting.
- Perform more complex data processing tasks.
6. Frequently Asked Questions
-
Q: If an Excel file has multiple worksheets, how do you get the number of rows for a specific worksheet?
- A: Can be passed
workbook[sheet_name]to specify the worksheet name, and then usemax_rowGet the number of rows.
- A: Can be passed
-
Q: How to deal with large Excel files to avoid memory issues?
- A: You can use iterators or chunked reading to process large files to reduce memory usage.
-
Q: If you need to perform complex operations on Excel files, are there any other libraries recommended?
- A: The pandas library is a powerful tool for handling large data sets and can be used in conjunction with openpyxl for more advanced data operations.
This is the end of this article about how to get the number of Excel files in Python. For more related content on Python to get the number of Excel lines, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!