query: E: Unable to locate package ipython3
positive_passages.docid: 743
positive_passages.text: How do I enable the "Universe" repository?
negative_passages.docid: 107074
negative_passages.text: High Sierra - The path /System/Installation/Packages/OSInstall.mpkg appears to be missing or damaged
negative_passages.docid: 142517
negative_passages.text: java packages: cannot find symbol
negative_passages.docid: 2166
negative_passages.text: python pip: no distributions at all found for an existing package
negative_passages.docid: 136463
negative_passages.text: I am trying to install package fetch
negative_passages.docid: 249
negative_passages.text: How do I fix this "E: Type '*' is not known on line * in source list ..." update error?
negative_passages.docid: 30571
negative_passages.text: E: Package 'libpng12-0' has no installation candidate [ubuntu 16.10 Gnome]
negative_passages.docid: 32220
negative_passages.text: How to resolve Unmet dependencies error?
negative_passages.docid: 2280
negative_passages.text: Package system is broken. How to fix it?
negative_passages.docid: 114299
negative_passages.text: How to install pip for python 3 in ubuntu 12.04 LTS
negative_passages.docid: 12773
negative_passages.text: The requested package is unknown
negative_passages.docid: 15828
negative_passages.text: How to find which package provides a file?
negative_passages.docid: 102708
negative_passages.text: Apt "could not find a distribution template" error
negative_passages.docid: 1632
negative_passages.text: How do I fix a "Failed to download package files" error?
negative_passages.docid: 96143
negative_passages.text: How to resolve "dpkg: error processing /var/cache/apt/archives/python-apport_2.0.1-0ubuntu9_all.deb"?
negative_passages.docid: 150104
negative_passages.text: Unable to download software center from package manager: 404 Not Found
negative_passages.docid: 4450
negative_passages.text: How can I reproduce the error "package... needs to be reinstalled, but I can't find an archive for it" for testing?