Pycharm by Jetbrains Installation

_{Note: This answer got updated in January 2019 according to JetBrains' recommendations at that time and because GetDeb seems broken. To see my previous version of the answer, check the revisions.}

You can visit the PyCharm Download page for Linux.

They offer three different ways to install PyCharm (Professional or Community Edition) there, in order of my personal preference. Decide on one of them:

JetBrains Toolbox App:

Don't download PyCharm directly, but instead get and install the free Toolbox App to manage all of your JetBrains IDEs easily. The Toolbox lets you conveniently manage and install all JetBrains IDEs and update them with a single click, all in one place. It can also centrally manage your account login, if you have a paid license.

I would strongly recommend it, especially if you might want to use any other JetBrains IDEs like e.g. IntelliJ or WebStorm too. This method also doesn't need administrator rights, everything will be installed in your home directory (~/.local/share/JetBrains by default).

To go this way, download the Toolbox installer first. It comes as .tar.gz archive again, but only contains a single AppImage executable. Extract and run that to install the Toolbox. You can delete the downloaded archive and AppImage after that again. Then, launch the Toolbox App:

It will list your installed IDEs, and show all other available products below that. Just click the Install button next to the PyCharm edition you want (free Community or paid Professional) and it will do everything for you in background.

You should also probably check the Toolbox settings and adapt them to your preference. To do that, click the screw nut symbol in the top right corner. Most importantly in my opinion, decide if you want it to keep the previous version after an update as fallback. Note that each IDE will take roughly around 1GB disk storage, and if you have many IDEs installed and also keep fallback versions, this can add up to a lot of space if your Ubuntu partition isn't that big. You can also switch automatic Toolbox (not IDE) updates, Toolbox autostart and sending anonymous statistics on or off.