PyDev does not appear in Eclipse after installation
PyDev is not intended to be installed via the Eclipse Marketplace. Follow the instructions at http://pydev.org/manual_101_install.html . In particular, this part
Installing updates from the site
Note. Instructions target Eclipse 3.5 onwards
To install the PyDev and PyDev extensions using the Eclipse Update Manager, you need to use the Help> Install New Software ... menu (note that in older versions this will be the Find and Install menu).
So basically you have to install it using the "Install New Software" menu. He explained in detail in the Pydev installation guide.
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There was this same problem a few days ago. You may have downloaded the wrong version of PyDev for your python version (2.7.5 or whatever, my python version, but I downloaded PyDev for 3.xx version)
1) Uninstall your current version of PyDev
2) you need to install the correct version using "Install New Software" and then uncheck "Show only the latest software" or whatever. Then select the version corresponding to your python version and install :)
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I had the same problem installing on Ubuntu 16.04 via repository. This is because the version installed was not compatible with the python plugin from http://www.pydev.org/updates/
Instead of the older version of both Eclipse and PyDev, I uninstalled Eclipse via the repository by clicking the Install button and then when it immediately switched to Uninstall I clicked on it.
Then I went to: http://www.eclipse.org/ and download the recommended gz file. Then I unzipped it to / opt directory. I removed the file path information from the command below and dragged the "eclipse-inst-linux64.tar.gz" file into the terminal to have the full path to the file.
sudo tar -xf /path/to/file -C /opt
Then I used Nautilus to navigate to my / opt / eclipse-installer folder and double clicked on the file: eclipse-inst
This launched the installer. I accepted the home directory recommendation. I accepted the offer to open Eclipse.
In Eclipse, I went to Help -> Market Place and then took the option to install PyDev.
Now that I got to Window -> Preferences there is a PyDev option.
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