Pipenv error when trying to install to virtualenv - python-3.6

Question

I'm trying to setup piping to output a pipfile for my employer. I'm totally new to this, and my system knowledge is lacking. Please can someone help me debug this error?
When I run :
pipenv install -e
I get the following error :
(py3) ➜ ~ git:(master) ✗ pipenv install -e
Creating a virtualenv for this project...
Pipfile: /Users/davidmellor/Pipfile
Using /Users/davidmellor/anaconda/envs/py3/bin/python (3.6.2) to create virtualenv...
⠋Already using interpreter /Users/davidmellor/anaconda/envs/py3/bin/python
Using base prefix '/Users/davidmellor/anaconda/envs/py3'
New python executable in /Users/davidmellor/.local/share/virtualenvs/davidmellor-1NR562gx/bin/python
dyld: Library not loaded: #rpath/libpython3.6m.dylib
Referenced from: /Users/davidmellor/.local/share/virtualenvs/davidmellor-1NR562gx/bin/python
Reason: image not found
ERROR: The executable /Users/davidmellor/.local/share/virtualenvs/davidmellor-1NR562gx/bin/python is not functioning
ERROR: It thinks sys.prefix is '/Users/davidmellor' (should be '/Users/davidmellor/.local/share/virtualenvs/davidmellor-1NR562gx')
ERROR: virtualenv is not compatible with this system or executable
Virtualenv location:
Creating a Pipfile for this project...
Traceback (most recent call last):
File "/Users/davidmellor/anaconda/envs/py3/bin/pipenv", line 11, in <module>
sys.exit(cli())
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 722, in __call__
return self.main(*args, **kwargs)
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/cli.py", line 435, in install
selective_upgrade=selective_upgrade,
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/core.py", line 1759, in do_install
pypi_mirror=pypi_mirror,
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/core.py", line 639, in ensure_project
ensure_pipfile(validate=validate, skip_requirements=skip_requirements, system=system)
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/core.py", line 288, in ensure_pipfile
project.create_pipfile(python=python)
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/project.py", line 607, in create_pipfile
required_python = self.which('python')
File "/Users/davidmellor/.local/lib/python3.6/site-packages/pipenv/core.py", line 115, in which
p = os.path.join(location, 'bin', command)
File "/Users/davidmellor/anaconda/envs/py3/lib/python3.6/posixpath.py", line 78, in join
a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not NoneType
I've tried to modify my PATH within my .bashrc file as follows :
PYTHON_BIN_PATH="$/Users/davidmellor/.local/bin"
PATH="$PATH:$PYTHON_BIN_PATH"
export PATH=$HOME/.composer/vendor/bin
export DJANGO_SETTINGS_MODULE=blog.settings
But still having no luck.
Thank you so much.

Answer 1

Try using 'pyenv' package with pipenv.
Install 'pyenv' package by using brew install pyenv (if you don't have it).
Install python 3.6.2 using pyenv install 3.6.2. In your case you are using anaconda, so you can also install any anaconda version you would like to use.
Use pyenv install --list to see the list of python available versions
Then, export new installed python version to PATH
export PATH=${PYENV_PYTHON_VERSIONS_HOME}/3.6.2/bin
Now in 'Piplock' specify the same version.
[requires]
python_version = "3.6.2"
Finally, run remove previous virtualenv and rebuild again.
pipenv --rm
pipenv install --dev.