I'm new to graphsage. Can't run. Getting error.Please explain

[tasmimul-huda]

I'm running the command and got the error python -m graphsage.supervised_train --train_prefix toy-ppi ./example_data/ppi --model graphsage_mean --sigmoid
Loading training data..
Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
"main", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/notebooks/graphsage/supervised_train.py", line 339, in
tf.app.run()
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/platform/app.py", line 48, in run
_sys.exit(main(_sys.argv[:1] + flags_passthrough))
File "/notebooks/graphsage/supervised_train.py", line 334, in main
train_data = load_data(FLAGS.train_prefix)
File "graphsage/utils.py", line 20, in load_data
G_data = json.load(open(prefix + "-G.json"))
IOError: [Errno 2] No such file or directory: 'toy-ppi-G.json'

[ShreyashUke]

Try running this command python -m graphsage.supervised_train --train_prefix ./example_data/toy-ppi --model graphsage_mean --sigmoid