1 | initial version |

@nburing is right, replacing the `None`

label with `''`

(the empty string does the job. If you have a partially labelled graph `G`

, and want to replace the `None`

labels with `''`

, you can do the following:

```
sage: for u,v,l in G.edges():
....: if l is None:
....: G.set_edge_label(u,v,'')
```

2 | No.2 Revision |

~~@nburing ~~@rburing is right, replacing the `None`

label with `''`

(the empty string does the job. If you have a partially labelled graph `G`

, and want to replace the `None`

labels with `''`

, you can do the following:

```
sage: for u,v,l in G.edges():
....: if l is None:
....: G.set_edge_label(u,v,'')
```

3 | No.3 Revision |

@rburing is right, replacing the `None`

label with `''`

(the empty ~~string ~~string) does the job. If you have a partially labelled graph `G`

, and want to replace the `None`

labels with `''`

, you can do the following:

```
sage: for u,v,l in G.edges():
....: if l is None:
....: G.set_edge_label(u,v,'')
```

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