

def _load_old_version(self):
    try:
        tmp = load(tmp.file_version_path)
        old_version = Version(tmp)
    except:
        old_version = None
    return old_version

dataset/ETHPy150Open conan-io/conan/conans/migrations.py Migrator._load_old_version/VarMisuse@18/23 `self`->`tmp`