package python3-pip 9.0.1-2.3~ubuntu1 failed to install/upgrade: installed python3-pip package post-installation script subprocess returned error exit status 127

[Sidharth Singh]

i installed python3.7 and python2.7 already existed. Needed both pip and pip3.
Then modified the alternatives in a bad way. Got it fixed though.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: python3-pip 9.0.1-2.3~ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
Uname: Linux 4.15.0-36-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
Date: Tue Oct 9 11:23:37 2018
DuplicateSignature:
 package:python3-pip:9.0.1-2.3~ubuntu1
 Setting up python3-wheel (0.30.0-0.2) ...
 /var/lib/dpkg/info/python3-wheel.postinst: 6: /var/lib/dpkg/info/python3-wheel.postinst: py3compile: not found
 dpkg: error processing package python3-wheel (--configure):
  installed python3-wheel package post-installation script subprocess returned error exit status 127
ErrorMessage: installed python3-pip package post-installation script subprocess returned error exit status 127
InstallationDate: Installed on 2018-10-08 (0 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.6, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.3ubuntu0.1
SourcePackage: python-pip
Title: package python3-pip 9.0.1-2.3~ubuntu1 failed to install/upgrade: installed python3-pip package post-installation script subprocess returned error exit status 127
UpgradeStatus: No upgrade log present (probably fresh install)