runin Neptune to which you can log metadata.
project=my_workspace/my_project: your workspace name and project name,
api_token=YOUR_API_TOKEN: your Neptune API token.
PARAMSdictionary with all the parameters that you want to keep track of.
"train/loss"is a name of the log with a hierarchical structure.
"train/loss"is a series of values - you can log multiple values to this log.
log()method is the actual value you want to log.
run["train/loss"].log(loss)multiple times at each step.