EasyXLS

How to add formulas in cells in Python

EasyXLS Excel library can be used to export Excel files with Python on Windows, Linux, Mac or other operating systems. The integration vary depending on the operating system or if the bridge for .NET Framework of Java is chosen:

EasyXLS on Windows using .NET Framework with Python

If you opt for the .NET version of EasyXLS, the below code requires Pythonnet, a bridge between Python and .NET Framework.

Step 1: Download and install EasyXLS Excel Library for .NET

To download the trial version of EasyXLS Excel Library, press the below button:

Download EasyXLS™ Excel Library for .NET

If you already own a license key, you may login and download EasyXLS from your account.

Step 2: Install Pythonnet

For the installation you need to run "pip" command as it follows. Pip is a package-management system used to install and manage software packages written in Python.
<Python installation path>\Scripts>pip install "pythonnet.whl"

Step 3: Include EasyXLS library into project

EasyXLS.dll must be added to your project. EasyXLS.dll can be found after installing EasyXLS, in "Dot NET version" folder.

Step 4: Run Python code that adds formula to Excel cell

Execute the following Python code that exports an Excel file with formulas.

"""-----------------------------------------------------------
Tutorial 11

This tutorial shows how to create an Excel file in Python that
has a cell that contains SUM formula for a range of cells.
-----------------------------------------------------------"""

import clr
import gc

clr.AddReference('EasyXLS')
from EasyXLS import *

print("Tutorial 11\n----------\n")

# Create an instance of the class that exports Excel files
workbook = ExcelDocument()

# Create a sheet
workbook.easy_addWorksheet("Formula")

# Get the table of data for the sheet, add data in sheet and the formula
xlsTable = workbook.easy_getSheet("Formula").easy_getExcelTable()
xlsTable.easy_getCell("A1").setValue("1")
xlsTable.easy_getCell("A2").setValue("2")
xlsTable.easy_getCell("A3").setValue("3")
xlsTable.easy_getCell("A4").setValue("4")
xlsTable.easy_getCell("A6").setValue("=SUM(A1:A4)")

# Export Excel file
print("Writing file C:\\Samples\\Tutorial11 - formulas in Excel.xlsx.")
workbook.easy_WriteXLSXFile("C:\\Samples\\Tutorial11 - formulas in Excel.xlsx")

# Confirm export of Excel file
sError = workbook.easy_getError()

if sError == "":
    print("\nFile successfully created.\n\n")
else:
    print("\nError encountered: " + sError + "\n\n")

# Dispose memory
gc.collect()

EasyXLS on Linux, Mac, Windows using Java with Python

If you opt for the Java version of EasyXLS, a similar code as above requires Py4J, Pyjnius or any other bridge between Python and Java.

Step 1: Download and install EasyXLS Excel Library for Java

To download the trial version of EasyXLS Excel Library, press the below button:

Download EasyXLS™ Excel Library for Java

If you already own a license key, you may login and download EasyXLS from your account.

Step 2: Install Py4j

For the Py4j installation you need to run "pip" command as it follows. Pip is a package-management system used to install and manage software packages written in Python.
<Python installation path>\Scripts>pip install "py4j.whl"

Step 3: Create additional Java program

The following Java code needs to be running in the background prior to executing the Python code.

import py4j.GatewayServer;

public class GatewayServerApp {
  public static void main(String[] args) {
    GatewayServerApp app = new GatewayServerApp();
    // app is now the gateway.entry_point
    GatewayServer server = new GatewayServer(app);
    server.start();
  }
}


Step 4: Add py4j library to CLASSPATH

py4j.jar must be added to your classpath of the additional Java program. py4j.jar can be found after installing Py4j, in "<Python installation path>\share\py4j" folder.

Step 5: Add EasyXLS library to CLASSPATH

EasyXLS.jar must be added to your classpath of the additional Java program. EasyXLS.jar can be found after installing EasyXLS, in "Lib" folder.

Step 6: Run additional Java program

Start the gateway server application and it will implicitly start Java Virtual Machine as well.

Step 7: Run Python code that adds formula to Excel cell

Execute a code as below Python code that exports an Excel file with formulas.

"""-----------------------------------------------------------
Tutorial 11

This tutorial shows how to create an Excel file in Python that
has a cell that contains SUM formula for a range of cells.
-----------------------------------------------------------"""

import gc

from py4j.java_gateway import JavaGateway
from py4j.java_gateway import java_import 
gateway = JavaGateway()

java_import(gateway.jvm,'EasyXLS.*') 

print("Tutorial 11\n----------\n")

# Create an instance of the class that exports Excel files
workbook = gateway.jvm.ExcelDocument()

# Create a sheet
workbook.easy_addWorksheet("Formula")

# Get the table of data for the sheet, add data in sheet and the formula
xlsTable = workbook.easy_getSheet("Formula").easy_getExcelTable()
xlsTable.easy_getCell("A1").setValue("1")
xlsTable.easy_getCell("A2").setValue("2")
xlsTable.easy_getCell("A3").setValue("3")
xlsTable.easy_getCell("A4").setValue("4")
xlsTable.easy_getCell("A6").setValue("=SUM(A1:A4)")

# Export Excel file
print("Writing file C:\\Samples\\Tutorial11 - formulas in Excel.xlsx.")
workbook.easy_WriteXLSXFile("C:\\Samples\\Tutorial11 - formulas in Excel.xlsx")

# Confirm export of Excel file
sError = workbook.easy_getError()

if sError == "":
    print("\nFile successfully created.\n")
else:
    print("\nError encountered: " + sError + "\n\n")

# Dispose memory
gc.collect()

EasyXLS Excel libraries:

.NET
Excel Library for Python .NET
full .NET version to import, export or convert Excel files
Excel Writer for Python .NET
.NET version to create and export Excel files
-
Java
Excel Library for Python Java
full Java version to import, export or convert Excel files
Excel Writer for Python Java
Java version to create and export Excel files
Download EasyXLS™ Excel Library for Python

File formats:

MS Excel 97 - 2003
MS Excel 2007 - 2010
MS Excel 2013
MS Excel 2016
MS Excel 2019
XLSXXLSMXLSBXLS
XMLHTMLCSVTXT