Exception from popen in python 3.5

[bmerrison]

Trying to import pixiedust_node fails in Python 3.5, with the following error:

Pixiedust database opened successfully

Pixiedust version 1.1.17

Table USER_PREFERENCES created successfully
Table service_connections created successfully

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-1-4a0fd16c56d9> in <module>()
----> 1 import pixiedust_node

~/miniconda/envs/tmp/lib/python3.5/site-packages/pixiedust_node/__init__.py in <module>()
     60         # start up a Node.js sub-process running a REPL
     61         path = os.path.join(__path__[0], 'pixiedustNodeRepl.js')
---> 62         node = Node(path)
     63 
     64         # pass the node process to the Node magics

~/miniconda/envs/tmp/lib/python3.5/site-packages/pixiedust_node/node.py in __init__(self, path)
    208         # process that runs the Node.js code
    209         args = (self.node_path, path)
--> 210         self.ps = self.popen(args)
    211         #print ("Node process id", self.ps.pid)
    212 

TypeError: __init__() got an unexpected keyword argument 'encoding'

In the code, the encoding argument is passed to popen if the Python version is 3 or greater:

    if sys.version_info.major == 3:
        popen_kwargs['encoding'] = 'utf-8'

But the encoding argument was only added to popen in python 3.6 (see: https://docs.python.org/3.6/library/subprocess.html). I'm not sure if just changing the if to sys.version_info.major == 3 and sys.version_info.minor > 6 will fix the problem.

[JustinGOSSES]

I get identical error. Same Python version and Pixiedust version.