I have iPython Notebook through Anaconda. I accidentally deleted an important notebook, and I can\'t seem to find it in trash (I don\'t think iPy Notebooks go to the trash).
The "delete" functionality now sends the file to OS trash rather than permanently deleting it, see this PR: https://github.com/jupyter/notebook/pull/1968. So you can just open your Trash (wherever that is on your system) and restore it.