Error Running Example Code with Generic Python REPL

[drpjm]

I just ran through the install process on my Mac. I run Ventura with Homebrew and all of the pre-reqs are installed. When I run the quick example in a virtual environment and repl, I received the following error from py5:

Unable to obtain source code for setup(). Either make it obtainable or create a settings() function for calls to size(), fullscreen(), etc.
py5 encountered an error in your code:

File "<stdin>", line 2, in setup

RuntimeError: Cannot call the size() method here. Either move it to a settings() function or move it to closer to the start of setup().

I did not see anything specific to this issue in the Mac OSX notes. Is there some other thing I need to do to run this from the python repl?

[hx2A]

Welcome, @drpjm !

I think you are running the example code in the generic Python interpreter. Can you use IPython instead, or put the example code in a file and run it from the command line with python test.py?

py5, like Processing, does some magic to allow you to put method calls such as size() in the setup() function instead of settings(), where they really belong. The magic will do some surgery on your setup() function to create a settings() method for you and a new setup() function. For this magic to work, py5 needs to have access to the source code of setup(), and to do that, it needs the source code to be written to a file. IPython does some stuff behind the scenes to meet this need, which is why the setup() stuff works just fine when run with IPyython. The generic Python interpreter does not do this. It can also provide less useful stack traces.

I looked at the installation documentation and I see the "Here is a quick py5 example to test that everything works" statement should say to test with IPython or by saving the code to a file. I will update this so others don't also run into the same problem.

[hx2A]

py5coding/py5book#99

[drpjm]

Thank you for the added details! And thanks also for taking the time to update the docs. As I read them, it seemed that it would work fine in a standard REPL, but I will try as a script instead. I will also attempt the IPython approach

[hx2A]

Great, I expect that will work well for you.

I just updated the install docs so future users will benefit from this discussion. Thanks again for your interest in py5 and your contribution!