package python3.5 3.5.2-2ubuntu0~16.04.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127

[bramint]

error came up when I rebooted apache2

python 3.5 seems not to be setup correctly.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: python3.5 3.5.2-2ubuntu0~16.04.3
ProcVersionSignature: Ubuntu 4.4.0-97.120-generic 4.4.87
Uname: Linux 4.4.0-97-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Wed Nov 1 12:57:57 2017
DuplicateSignature:
 package:python3.5:3.5.2-2ubuntu0~16.04.3
 Setting up python3.5 (3.5.2-2ubuntu0~16.04.3) ...
 /var/lib/dpkg/info/python3.5.postinst: 9: /var/lib/dpkg/info/python3.5.postinst: /usr/bin/python3.5: not found
 dpkg: error processing package python3.5 (--configure):
  subprocess installed post-installation script returned error exit status 127
ErrorMessage: subprocess installed post-installation script returned error exit status 127
InstallationDate: Installed on 2017-04-03 (213 days ago)
InstallationMedia: Ubuntu-Server 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.8)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SourcePackage: python3.5
Title: package python3.5 3.5.2-2ubuntu0~16.04.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.