Description of problem:
I used dnf-3 with copr plugin.

Version-Release number of selected component:
python3-dnf-0.6.3-2.fc21

Additional info:
reporter:       libreport-2.3.0
cmdline:        /usr/bin/python3 -OO /bin/dnf-3 --enablerepo=updates-testing copr search sssd
executable:     /bin/dnf-3
kernel:         3.18.7-200.fc21.x86_64
runlevel:       N 5
type:           Python3
uid:            0

Truncated backtrace:
copr.py:146:run:AttributeError: 'module' object has no attribute 'FancyURLopener'

Traceback (most recent call last):
  File "/bin/dnf-3", line 35, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 182, in user_main
    errcode = main(args)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 84, in main
    return _main(base, args)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 134, in _main
    cli.run()
  File "/usr/lib/python3.4/site-packages/dnf/cli/cli.py", line 1059, in run
    return self.command.run(self.base.extcmds)
  File "/usr/lib/python3.4/site-packages/dnf-plugins/copr.py", line 146, in run
    opener = urllib.FancyURLopener({})
AttributeError: 'module' object has no attribute 'FancyURLopener'

Local variables in innermost frame:
project_name: 'sssd'
api_path: '/api/coprs/search/sssd/'
subcommand: 'search'
repo_filename: '/etc/yum.repos.d/_copr_sssd.repo'
chroot: 'fedora-21-x86_64'
self: <dnf.plugin.dynamic.copr.CoprCommand object at 0x7f3a14cc8b70>
extcmds: ['search', 'sssd']