ensure that you have a local version of your files / project
open your project in PyCharm
connect to the node within PyCharm: go to Settings, click on your project folder in the left panel, click on Python interpreter, click on add interpreter, click on on SSH
in the window that just popped up, enter the job details: nodename, port, username
the click Next, and select SSH Key authentification: in the dropdown menu, enter the path to your private key ; then click next until the window closes
click on New target: the SSH window opens
specify the Sync folder: select the remote folder to wherever your project is on blissey / chansey
click Create
finally, go to Settings > build/execution/deployment > deployment > mapping: you may need to re-enter the path to your sync folder under Deployement path (if it's empty)