In case of Python 3.6, register variable error occurs.

[sky-joker]

Describe the bug

When Ansible Kernel 0.8.0 is running in Docker container, the following error occurred.(Ansible Kernel is running on Python3.6) The same error does not occur in python2.

To Reproduce

# docker run -p 8888:8888 -d -it --name jupyter centos:centos7
# docker exec -it jupyter bash
# yum -y install epel-release
# yum -y install python36 python36-devel gcc
# curl https://bootstrap.pypa.io/get-pip.py | python36
# pip3 install jupyter jupyterlab
# pip3 install ansible ansible-kernel ipython
# python36 -m ansible_kernel.install
# jupyter lab --ip=0.0.0.0 --allow-root

Screenshots

Desktop (please complete the following information):

• OS: CentOS Linux release 7.5.1804 (Core) and Red Hat Enterprise Linux Server release 7.5 (Maipo)
• Browser chrome
• Version 69.0.3497.100
• Jupyter 4.4.0
• Jupyter lab 0.34.12

Additional context

I fixed the bug as follows.

--- before/kernel.py    2018-09-29 14:31:59.057127090 +0000
+++ after/kernel.py 2018-09-29 14:32:22.212129487 +0000
@@ -432,7 +432,7 @@

             if message_data.get('full_results', None) and self.registered_variable is not None:
                 logger.debug('full_results %s', type(message_data.get('full_results')))
-                self.shell.run_cell("{0} = json.loads('{1}')".format(self.registered_variable,
+                self.shell.run_cell("import json; {0} = json.loads('{1}')".format(self.registered_variable,
                                                                      message_data.get('full_results')))

             if message_data.get('results', None):

thanks.

[benthomasson]

Please make a pull request with those changes. Thanks for the issue report!