How do I get PyCharm to show method signatures and documentation in the Python/IPython console and the editor?
In pycharm you have ctrl-q (or ctrl-j on a mac) for a quick-doc of the function under the cursor.
Ctrl + P to show method signature (parameters) as a pop-up.
other shortcut keys for pycharm are all available here.
If you are looking for Mac shortcut it's
Command + P (⌘+P), accepted answer's solution didn't work.