def _reload(mod, _larch=None, **kws):
    if _larch is None:
        raise Warning("cannot reload module '%s' -- larch broken?" % mod)

    modname = None
    if mod in _larch.symtable._sys.modules.values():
        for k, v in _larch.symtable._sys.modules.items():
            if v == mod:
                modname = k
    elif mod in sys.modules.values():
        for k, v in sys.modules.items():
            if v == mod:
                modname = k
    elif (mod in _larch.symtable._sys.modules.keys() or
          mod in sys.modules.keys()):
        modname = mod

    if modname is not None:
        return _larch.import_module(modname, do_reload=True)
reload a module, either larch or python
dataset/ETHPy150Open xraypy/xraylarch/lib/builtins.py/_reload