| import functools | |
| # from jaraco.functools 3.5 | |
| def pass_none(func): | |
| """ | |
| Wrap func so it's not called if its first param is None | |
| >>> print_text = pass_none(print) | |
| >>> print_text('text') | |
| text | |
| >>> print_text(None) | |
| """ | |
| @functools.wraps(func) | |
| def wrapper(param, *args, **kwargs): | |
| if param is not None: | |
| return func(param, *args, **kwargs) | |
| return wrapper |