Python packages listed in requirements file that are in the system are not downloaded and installed

[Bruno Nova]

When using the python plugin and I use the "requirements" option, packages listed in that file that are already installed in the host system are not downloaded and installed to the snap.

This happens at least for packages that were installed by "pip3 install --user" to my home directory.
I don't know if this also happens for packages installed in the system directories.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: snapcraft 2.13.1
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Aug 9 21:09:40 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-04-25 (106 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: snapcraft
UpgradeStatus: No upgrade log present (probably fresh install)

[Sergio Schvezov (sergiusens)]

Do you have an existing example that triggers this? Is this still occurring with the latest versions of snapraft?

[Launchpad Janitor (janitor)]

[Expired for snapcraft (Ubuntu) because there has been no activity for 60 days.]