Python Tool Issues - Alteryx Versions

[AlteryxUserFL]

I built a workflow that uses the python tool on the latest version of Alteryx. When the flow is run using Alteryx 2018, I get the below error. Has anyone encountered this before? I must be able to run the flow using Alteryx 2018 and, ideally, newer versions also. 

Error: Python (3): [NbConvertApp] Converting notebook C:\Users\ddavis05\AppData\Local\Temp\6adbdc90-141d-4915-ad36-05ced272c0f2\3\workbook.ipynb to html
[NbConvertApp] Executing notebook with kernel: jupytertool_venv
Traceback (most recent call last):
  File "C:\Program Files\Alteryx\bin\Miniconda3\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "C:\Program Files\Alteryx\bin\Miniconda3\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "c:\program files\alteryx\bin\Miniconda3\PythonTool_Venv\Scripts\jupyter-nbconvert.EXE\__main__.py", line 9, in <module>
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\jupyter_core\application.py", line 266, in launch_instance
    return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\traitlets\config\application.py", line 658, in launch_instance
    app.start()
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\nbconvertapp.py", line 325, in start
    self.convert_notebooks()
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\nbconvertapp.py", line 493, in convert_notebooks
    self.convert_single_notebook(notebook_filename)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\nbconvertapp.py", line 464, in convert_single_notebook
    output, resources = self.export_single_notebook(notebook_filename, resources, input_buffer=input_buffer)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\nbconvertapp.py", line 393, in export_single_notebook
    output, resources = self.exporter.from_filename(notebook_filename, resources=resources)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\exporters\exporter.py", line 174, in from_filename
    return self.from_file(f, resources=resources, **kw)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\exporters\exporter.py", line 192, in from_file
    return self.from_notebook_node(nbformat.read(file_stream, as_version=4), resources=resources, **kw)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\exporters\html.py", line 85, in from_notebook_node
    return super(HTMLExporter, self).from_notebook_node(nb, resources, **kw)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\exporters\templateexporter.py", line 280, in from_notebook_node
    nb_copy, resources = super(TemplateExporter, self).from_notebook_node(nb, resources, **kw)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\exporters\exporter.py", line 134, in from_notebook_node
    nb_copy, resources = self._preprocess(nb_copy, resources)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\exporters\exporter.py", line 311, in _preprocess
    nbc, resc = preprocessor(nbc, resc)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\preprocessors\base.py", line 47, in __call__
    return self.preprocess(nb, resources)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\preprocessors\execute.py", line 257, in preprocess
    cwd=path)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\nbconvert\preprocessors\execute.py", line 237, in start_new_kernel
    km.start_kernel(**kwargs)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\jupyter_client\manager.py", line 246, in start_kernel
    kernel_cmd = self.format_kernel_cmd(extra_arguments=extra_arguments)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\jupyter_client\manager.py", line 170, in format_kernel_cmd
    cmd = self.kernel_spec.argv + extra_arguments
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\jupyter_client\manager.py", line 82, in kernel_spec
    self._kernel_spec = self.kernel_spec_manager.get_kernel_spec(self.kernel_name)
  File "c:\program files\alteryx\bin\miniconda3\pythontool_venv\lib\site-packages\jupyter_client\kernelspec.py", line 236, in get_kernel_spec
    raise NoSuchKernel(kernel_name)
jupyter_client.kernelspec.NoSuchKernel: No such kernel named jupytertool_venv

[BrandonB]

The Python tool was released in Alteryx version 2018.3. If you are trying to run a workflow with a Python tool in a version earlier than this, it won't have the Python environment installed and therefore won't be able to run the tool. 

[BrandonB]

https://community.alteryx.com/t5/Alteryx-Designer-Knowledge-Base/Tool-Mastery-Python/ta-p/197860

[AlteryxUserFL]

I need to be able to run it on 2018.3.7.57595, My apologies for not being more specific.  

[BrandonB]

It looks like it isn't finding your Python environment based on the error message. The Python Tool creates a Python environment in your Alteryx directory under \bin\Miniconda3. Can you see if this folder exists on the machine with the older version? 

[AndrewKramer · Accepted solution]

We changed the Python Tool Virtual Environment name in 2019 and this is why your workflow is failing. If you open the workflow in 2018.3 and click on the Python Tool, are you given the option to change the kernel?