package python-jwt 1.3.0-1 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1

[Giang Tran]

This bug happened when I tried to install the upgrade package of ubuntu

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: python-jwt 1.3.0-1ubuntu0.1
ProcVersionSignature: Ubuntu 4.10.0-32.36~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-32-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Tue Sep 12 08:44:57 2017
ErrorMessage: subprocess new pre-removal script returned error exit status 1
InstallationDate: Installed on 2017-07-17 (56 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SourcePackage: pyjwt
Title: package python-jwt 1.3.0-1 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Joshua Powers (powersj)]

From log:

Preparing to unpack .../python-jwt_1.3.0-1ubuntu0.1_all.deb ...
  File "/usr/bin/pyclean", line 63
    except (IOError, OSError), e:
                             ^
SyntaxError: invalid syntax
dpkg: warning: subprocess old pre-removal script returned error exit status 1
dpkg: trying script from the new package instead ...
  File "/usr/bin/pyclean", line 63
    except (IOError, OSError), e:
                             ^
SyntaxError: invalid syntax

[Joshua Powers (powersj)]

Thank you for taking the time to file a bug report.

Per the log message above, you may have changed the default Python version
from 2 to 3. This leads to unexpected behavior like the errors you are
currently seeing.

Since it seems likely to me that this is a local configuration problem,
rather than a bug in Ubuntu, I am marking this bug as 'Incomplete'.

However, if you believe that this is really a bug in Ubuntu, then we would
be grateful if you would provide a more complete description of the problem
with steps to reproduce, explain why you believe this is a bug in Ubuntu
rather than a problem specific to your system, and then change the bug
status back to "New".

For local configuration issues, you can find assistance here:
http://www.ubuntu.com/support/community

[Launchpad Janitor (janitor)]

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