Traceback (most recent call last):
  File "/usr/lib/python3.10/py_compile.py", line 144, in compile
    code = loader.source_to_code(source_bytes, dfile or file,
  File "<frozen importlib._bootstrap_external>", line 947, in source_to_code
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "foo.py", line 1
    ndef xor(n):
         ^^^
SyntaxError: invalid syntax

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.10/py_compile.py", line 150, in compile
    raise py_exc
py_compile.PyCompileError:   File "foo.py", line 1
    ndef xor(n):
         ^^^
SyntaxError: invalid syntax