mathspp / building-a-python-compiler-and-interpreter Goto Github PK

I get the following error when I run 'python -m pytcomp.interpreter "a = b + 3":

(pytcomp) PS E:\Projects\pytcomp> python -m pytcomp.interpreter "a = b + 3"
bc: Bytecode(BytecodeType.LOAD, 'b')
bc.value: b
Traceback (most recent call last):
File "", line 198, in _run_module_as_main
File "", line 88, in _run_code
File "E:\Projects\pytcomp\src\pytcomp\interpreter.py", line 105, in
Interpreter(bytecode).interpret()
File "E:\Projects\pytcomp\src\pytcomp\interpreter.py", line 50, in interpret
interpret_method(bc)
File "E:\Projects\pytcomp\src\pytcomp\interpreter.py", line 88, in interpret_load
self.stack.push(self.scope[bc.value])
~~~~~~~~~~^^^^^^^^^^
KeyError: 'b'

I have looked through the code for 0.6.0, 0.7.0, 0.8.0, and 0.9.0 and have not found anywhere that 'b' (or anything) is added to scope.
HELP! :)
This error occurs when I run your code as well:

(pytcomp) PS E:\Projects\pytcomp\0.6.0\src> python -m python.interpreter "a = b + 3"
Traceback (most recent call last):
File "", line 198, in _run_module_as_main
File "", line 88, in _run_code
File "E:\Projects\pytcomp\0.6.0\src\python\interpreter.py", line 101, in
Interpreter(bytecode).interpret()
File "E:\Projects\pytcomp\0.6.0\src\python\interpreter.py", line 48, in interpret
interpret_method(bc)
File "E:\Projects\pytcomp\0.6.0\src\python\interpreter.py", line 84, in interpret_load
self.stack.push(self.scope[bc.value])
~~~~~~~~~~^^^^^^^^^^
KeyError: 'b'

I am running python 3.12.1 on Windows 11 in a virtual environment.

I am really enjoying this series; brings back pleasant memories of a compiler construction class from grad school a gazillion years ago...