Escaping of spaces in node/edge names

[Sebastian Bischoff]

Implement escaping or removing of spaces in node and edge names in to_str function.

[Freya Behrens]

is this only about spaces?
e.g. "writes book" sould be "writes_book" or "writesbook"?

in any case, just use "writes book".replace(" ",replacement) where replacement could be an emty string or underscore

[Sebastian Bischoff]

is this only about spaces?

The reason is that the edge and node types should be recognized as "words" by the tf-idf-Vectorizer from sklearn.

[Michael Hunger]

In cypher you can use backticks around node-labels and property-key and rel-types.

In the java/kernel API you just use Java Strings.

[Freya Behrens]

apparently you can override the word tokenizer with your own callable, so maybe use
tokenizer=lambda sequence: sequence.split(';') and we can just pass the metapath with ';' as a delimter