blink1073
commented
2 years ago Hi @jliou369, the default nout is 1, which causes an error when the script does not return anything. If am able to run oc.hello_world(nout=0) using your example. We used to try and infer nout from the call, but it turned out to be too brittle with the CPython interpreter.
Here is the oct2py document suggested ways of using m files with oct2py
so I wrote a simple script to try it out, and among ways, only "octave.eval worked, but without the arguments, here is the code, note: I use Oct2Py so that I can use the logger at DEBUG level
from oct2py import octave, Oct2Py, get_log import logging config: OS: Windows 10, oct2py: 5.2.0, Python: 3.8.2, octave: 6.1.0 ======= oct.py =========== oc = Oct2Py(logger=get_log()) oc.logger = get_log('new_log') oc.logger.setLevel(logging.DEBUG)
oc.addpath('C:/Users/jliou/wta21') oc.hello_world()
oc.eval("hello_world")
octave.feval('C:/Users/jliou/wta21/hello_world.m')
===============================
===== hello_world.m ================= disp("Hello World from m file I"); disp("Hello World from m file II"); disp("Hello World from m file III");
------- Output of oc.helloworld() NOT WORKING----------
C:\Users\jliou\wta21>python oct.py Octave eval: exist("addpath") ans = 5
Octave eval: set(0, 'defaultfigurevisible', 'on'); graphics_toolkit('fltk'); Octave eval: _pyeval("C:/Users/jliou/AppData/Local/Temp/tmpsy5z5l57/writer.mat", "C:/Users/jliou/AppData/Local/Temp/tmpsy5z5l57/reader.mat"); Octave eval: exist("hello_world") ans = 2
Octave eval: set(0, 'defaultfigurevisible', 'on'); graphics_toolkit('fltk'); Octave eval: _pyeval("C:/Users/jliou/AppData/Local/Temp/tmpsy5z5l57/writer.mat", "C:/Users/jliou/AppData/Local/Temp/tmpsy5z5l57/reader.mat"); {'message': "octave_base_value::int_value (): wrong type argument 'matrix'", 'identifier': '', 'stack': {'file': 'C:\Python38\Lib\site-packages\oct2py\_pyeval.m', 'name': '_pyeval', 'line': 72.0, 'column': 11.0}} Traceback (most recent call last): File "oct.py", line 10, in
oc.hello_world()
File "C:\Python38\lib\site-packages\oct2py\dynamic.py", line 96, in call
return self._ref().feval(self.name, *inputs, **kwargs)
File "C:\Python38\lib\site-packages\oct2py\core.py", line 380, in feval
return self._feval(func_name, func_args, dname=dname, nout=nout,
File "C:\Python38\lib\site-packages\oct2py\core.py", line 582, in _feval
raise Oct2PyError(msg)
oct2py.utils.Oct2PyError: Octave evaluation error:
error: octave_base_value::int_value (): wrong type argument 'matrix'
----------- Output of oc.eval("hello_world") WORKING---------------------- C:\Users\jliou\wta21>python oct.py Octave eval: exist("addpath") ans = 5
Octave eval: set(0, 'defaultfigurevisible', 'on'); graphics_toolkit('fltk'); Octave eval: _pyeval("C:/Users/jliou/AppData/Local/Temp/tmphb2bhkq8/writer.mat", "C:/Users/jliou/AppData/Local/Temp/tmphb2bhkq8/reader.mat"); Octave eval: graphics_toolkit('gnuplot') set(0, 'defaultfigurevisible', 'off'); Octave eval: _pyeval("C:/Users/jliou/AppData/Local/Temp/tmphb2bhkq8/writer.mat", "C:/Users/jliou/AppData/Local/Temp/tmphb2bhkq8/reader.mat"); Hello World from m file I Hello World from m file II Hello World from m file III
------- Output of oc.addpath('C:/Users/jliou/wta21') NOT WORKING ----------------- C:\Users\jliou\wta21>python oct.py Octave eval: exist("addpath") ans = 5
Octave eval: set(0, 'defaultfigurevisible', 'on'); graphics_toolkit('fltk'); Octave eval: _pyeval("C:/Users/jliou/AppData/Local/Temp/tmp1avijbt7/writer.mat", "C:/Users/jliou/AppData/Local/Temp/tmp1avijbt7/reader.mat"); Traceback (most recent call last): File "oct.py", line 12, in
octave.feval('C:/Users/jliou/wta21/hello_world.m')
File "C:\Python38\lib\site-packages\oct2py\core.py", line 380, in feval
return self._feval(func_name, func_args, dname=dname, nout=nout,
File "C:\Python38\lib\site-packages\oct2py\core.py", line 582, in _feval
raise Oct2PyError(msg)
oct2py.utils.Oct2PyError: Octave evaluation error:
error: octave_base_value::int_value (): wrong type argument 'matrix'
BTW, for arguments like oc.eval("hello_world(1,2)", none of the three options worked. Let me know if you want the debug output.
Thanks for the help!