import sys, inspect
 
label = lambda lineno: type(
    'label',
    (object,),
    dict(line=lineno)
)
 
def prepare_labels(fp, scope):
    with open(fp, 'r') as f:
        lines = f.readlines()
 
    for lineno, line in enumerate(lines):
        if line.startswith('#LABEL'):
            # 1 + 1, first to account for 0 index then to account for comment line
            scope.__setitem__(line.split(' ')[1].strip(), label(lineno+2)) 
 
_goto = type('goto', (object,), dict(__and__=lambda _, other: (_goto(other.line))))
 
goto = _goto()
 
def _goto(lineno):
    frame = sys._getframe().f_back.f_back
    called_from = frame
 
    def hook(frame, event, _):
        if event == 'line' and frame == called_from:
            try:
                frame.f_lineno = lineno
            except ValueError as e:
                print("jump failed:", e)
            while frame:
                frame.f_trace = None
                frame = frame.f_back
            return None
        return hook
 
    # it doesn't think we actually need to set the hook for each frame
    # while frame:
    #     frame.f_trace = hook
    #     frame = frame.f_back
 
    called_from.f_trace = hook
    sys.settrace(hook)
 
prepare_labels(inspect.stack()[-1].frame.f_code.co_filename, inspect.stack()[-1].frame.f_globals)