Help protect the Great Barrier Reef with TensorFlow on Kaggle Join Challenge

Writes the given graph to the file filename in TSV format.

filename Name of the file to which TSV output is written. The TSV lines are written in the same form as the input expected by read_tsv_graph().
graph A dict source_id -> (target_id -> weight) representing the graph.

None. Instead, this has the side-effect or writing output to a file.