Use jgrapht bindings to explore and analyze the webgraphs

[sebastian-nagel]

jgrapht now (jgrapht/jgrapht@63e8f72) includes bindings to the Webgraph lib/tools. Should try the jgrapht Python bindings (based on GraalVM) to explore and analyze the webgraphs, as soon as the next version is released which includes the Webgraph bindings.

[sebastian-nagel]

Superseded by commoncrawl/cc-webgraph#16.

Also: jgrapht Python bindings weren't updated since Nov 2020 and still do not include the Webgraph bindings.