Compilation error on code that works fine locally

[zhendrikse]

My wave equation program cannot be run because of some vague compilation error (see WaveEquation source code on beta testing server)

Error:PythonError: Traceback (most recent call last):
File "/lib/python312.zip/_pyodide/_base.py", line 606, in eval_code_async
.compile()
^^^^^^^^^
File "/lib/python312.zip/_pyodide/_base.py", line 297, in compile
self._gen.send(self.ast)
File "/lib/python312.zip/_pyodide/_base.py", line 166, in _parse_and_compile_gen
return compile(mod, filename, mode, flags, dont_inherit, optimize)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 66
SyntaxError: 'await' outside async function

[sspickle]

You need to declare update_pixels as an async function.

The issue is that rate is an async function. To make WebVPython programs simpler, the rate() function is detected and an await is added before the code is sent to the interpreter. If rate() is called in global scope, no problem. However, if you call it from within a function, the function needs to be defined as an async function.