charm build fails w/ "AttributeError: 'module' object has no attribute 'HTTPSConnection'"

[dannf]

Checklist

• Confirmed this is an issue with charm-tools, not charmstore-client
• Provide versions of tools used
• Described the feature or ways to replicate the issue

What version am I running?

I ran the following command: charm version and got the following ouput:

charm 2.2.2
charm-tools 2.2.1

I ran the following command: snap info charm and got the following output:

name:      charm
summary:   "charm and charm-tools"
publisher: charms
description: |
  charmstore-client and charm-tools
snap-id: 2Rryoc2ylScfbFl4eQtpntHD9iuZuMvt
commands:
  - charm
tracking:    stable
installed:   2.2 (15) 48MB classic
refreshed:   2017-03-24 14:59:35 -0600 MDT
channels:             
  stable:    2.2 (15) 48MB  classic
  candidate: 2.2 (17) 102MB -
  beta:      ↑              
  edge:      2.2 (20) 102MB -

I am using: Debian unstable

Issue/Feature

I expect/expected the following

Executing charm build would build my charm.

What I got

dannf@xps13:~/git/java-browser-charm$ charm build
Traceback (most recent call last):
  File "/snap/charm/15/bin/charm-build", line 7, in <module>
    from charmtools.build.builder import main
  File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/__init__.py", line 6, in <module>
    from builder import (
  File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/builder.py", line 16, in <module>
    from charmtools import (utils, repofinder, proof)
  File "/snap/charm/15/lib/python2.7/site-packages/charmtools/proof.py", line 23, in <module>
    from charms import Charm
  File "/snap/charm/15/lib/python2.7/site-packages/charmtools/charms.py", line 13, in <module>
    from launchpadlib.launchpad import Launchpad
  File "/snap/charm/15/lib/python2.7/site-packages/launchpadlib/launchpad.py", line 33, in <module>
    from httplib2 import proxy_info_from_environment
  File "/snap/charm/15/lib/python2.7/site-packages/httplib2/__init__.py", line 960, in <module>
    class HTTPSConnectionWithTimeout(httplib.HTTPSConnection):
AttributeError: 'module' object has no attribute 'HTTPSConnection'

[johnsca]

This is actually an issue with the classic snap mixing with the environment and causing a Python lib version conflict. The candidate channel snap is strictly confined, and we're working on getting that to stable shortly.

[johnsca]

The confined snap is now in the stable channel. Please do a snap refresh charm and try again, and re-open if still an issue.