util.py 文件源码

def _positional_rename_invalid_identifiers(field_names):
    names_out = list(field_names)
    for index, name in enumerate(field_names):
        if (not all(c.isalnum() or c == '_' for c in name)
            or keyword.iskeyword(name)
            or not name
            or name[0].isdigit()
            or name.startswith('_')):
            names_out[index] = 'field_%d_' % index
    return names_out