Explain how to decompress using Python (one-liner)

[Guillaume Grossetie]

$ echo "eNpLyUwvSizIUHBXqPZIzcnJ17ULzy_KSanlAgB1EAjQ" | python -c "import sys; import base64; import zlib; print(zlib.decompress(base64.urlsafe_b64decode(sys.stdin.read())))"
digraph G {Hello->World}

This command might be useful to troubleshoot (and proves that the diagram definition can be retrieved from the encoded data).