@[view2715](/user/753111)
```python
io.input_writeln(graph.to_str(output=Edge.unweighted_edge)) # 输出无权图，以每条边 u v 一行的格式
```
by Network_Error @ 2022-08-15 21:12:57
@[Network_Error](/user/534654) 谢dalao，但这是怎么回事
```
File "c:/.../STD.py", line 22, in <module>
io.input_writeln(graph.to_str(output=Edge.unweighted_edge))
AttributeError: module 'cyaron.io' has no attribute 'input_writeln'
```
by view2715 @ 2022-08-15 21:15:43
改好了，没事。
by view2715 @ 2022-08-15 21:17:16