Why can't I run my python script from Matlab?

Hi

I am trying to use this line

py.intervals.py();

Where intervals is a python script. I get the error

>> py.intervals.py()
Undefined variable "py" or class "py.intervals.py".

I am using R2018b. Do I need to purchase a Python Libraries API?

Answer 1

[Jan]

See https://www.mathworks.com/help/matlab/call-python-libraries.html and https://www.mathworks.com/help/matlab/matlab_external/system-requirements-for-matlab-engine-for-python.html

[Stelios Fanourakis]

Yes I have seen the Python Libraries. I got the errors

Import argument 'intervals.py' cannot be found or cannot be imported. 

Answer 2

[Prathamesh Degwekar]

Hi,

I see two possible corrections you could try. Firstly try calling the python module itself instead of the file name (like "py.mymod.search(N)" instead of "py.mymod.py").

Secondly, maybe your file isn't in the python search path. If it isn't, try adding your folder to the python sys path using:

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

Answer 3

[Rafael Rebouças]

My solution:

% Simple way to load your library
copyfile(my_library_file_path, pwd,  'f');
% It's necessary to load library
py.my_library.any_method_or_function();
delete 'my_library.py';

Now, your Python library is loaded to use in any directory.