multiprocessing library is a dependency when installing with pip

[lucydot]

Describe the bug
Thanks for the excellent looking package and clear documentation. I tried to install pieface using conda+pip. There was an error and install was unsuccessful. It is the error reported here: https://stackoverflow.com/questions/42568638/python-multiprocessing-installation-command-python-setup-py-egg-info-failed-w. This is unexpected as I can see that you have removed the multiprocessing library as a dependency in setup.py. Perhaps this is not reflected in the version you have uploaded to PyPI? pip is collecting pieface 1.1.0.

To Reproduce

conda create --name pieface
conda activate pieface
conda install pip
pip install pieface

Expected behavior
Succesful installation

Screenshots and Files
N/A

Operating system (please complete the following information):

• OS: Mac
• Python version: Python3.9.2
• PIEFACE version: 1.1.0

Additional context
The workaround that worked for me is to install the dependencies in setup.py separately and then pip install --no-dependencies pieface. I'm just flagging this up as a FYI.

[lucydot]

Hello,

Just following up on this. Although it installed correctly with the workaround above, I still had problems as I was using Python 3. I specified Python 2.7 in my conda environment and everything worked as expected (multiprocessing was installed as a dependency without problems).

conda create --name pieface python=2.7
conda activate pieface
conda install pip
pip install pieface

As most people / projects are on Python3 as default now it might be worth flagging up in the README that Python2 is the supported language.

Thanks again for the code, I'm just waiting for it to churn through some cifs at the moment -

Lucy

[jcumby]

Thanks for the bug report @lucydot! You're spot on; I removed the dependency on multiprocessing in the development version, but had not released a newer version to PyPI.

I'm a long way behind in moving to Python3, but it is on the to-do list. My plan is also to distribute using conda in the future (rather than the windows installer or Pip); my hope is I might find time this summer to work on all this!