package python-requests 2.2.1-1ubuntu0.2 failed to install/upgrade: subprocess new pre-removal script returned error exit status 126

[shiyue]

update python3 error

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: python-requests 2.2.1-1ubuntu0.2
ProcVersionSignature: Ubuntu 3.16.0-41.57~14.04.1-generic 3.16.7-ckt11
Uname: Linux 3.16.0-41-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
Date: Thu Jul 2 10:07:23 2015
DuplicateSignature: package:python-requests:2.2.1-1ubuntu0.2:subprocess new pre-removal script returned error exit status 126
ErrorMessage: subprocess new pre-removal script returned error exit status 126
InstallationDate: Installed on 2015-05-17 (45 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
PackageArchitecture: all
SourcePackage: requests
Title: package python-requests 2.2.1-1ubuntu0.2 failed to install/upgrade: subprocess new pre-removal script returned error exit status 126
UpgradeStatus: No upgrade log present (probably fresh install)