I agree that the proposal as written should be rejected.  I am inclined to think this issue should be closed.

I do not understand the claim about 'python -m py_compile'.  For me, this does nothing, as I would expect from reading the code.  If args = sys.arg[1:] is empty, the else clause for loop immediately quits.

Syntax checking is easily done with compile; that is how IDLE does it.  
  python -c "compile(open(<filename>).read(), '', 'exec').
should do what Pavel tried to do, except for getting a SyntaxError instead of py_compile.PyCompileError.