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Calling a Python function from MATLAB

  • Last Updated : 24 May, 2021

We can call the Python functions and objects directly from MATLAB. To call Python functions from MATLAB, need to install a supported version of  Python. MATLAB supports versions 2.7, 3.6, and 3.7

MATLAB  loads Python when you type py.command.

py.modulename.functionname

Below examples shows how to call a user defined Python function from MATLAB.

Example 1 :

Call Python function to print Hello. 
First of all, we will make a Python module named print.py containing the function.
 



Python3




# Python Module - print.py
 
def printHello:
    return "Hello"

Now, open a new file in MATLAB Editor. Verify whether the current folder pointed to the Python search path. Use below code to add the current folder to Python search path.

MATLAB




if count(py.sys.path, '') == 0
  insert(py.sys.path, int32(0), '');
end

Call the Python function to print Hello.

MATLAB




py.print.printHello();

Output : 
 

Hello

 

Example 2 : Call Python function to get the sum of two numbers.

First of all, we will create a Python module names add.py containing the function.
 

Python3




# Python Module - add.py
 
def addgivenNumbers( num1, num2):
    sum = num1 + num2
    return sum

Call Python function to get the sum of two given numbers

MATLAB




py.add.addgivenNumbers(int32(2), int32(3));

Output : 
 

5

 

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