Python - ModuleNotFound error using Anaconda

Question

I am trying to run this program:

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
from io import open

from multiprocessing import Pool
import buildingspy.simulate.Simulator as si


# Function to set common parameters and to run the simulation
def simulateCase(s):
''' Set common parameters and run a simulation.

:param s: A simulator object.

'''
s.setStopTime(86400)
# Kill the process if it does not finish in 1 minute
s.setTimeOut(60)
s.showProgressBar(False)
s.printModelAndTime()
s.simulate()


def main():
''' Main method that configures and runs all simulations
'''
import shutil
# Build list of cases to run
li = []
# First model
model = 'Buildings.Controls.Continuous.Examples.PIDHysteresis'
s = si.Simulator(model, 'dymola', 'case1')
s.addParameters({'con.eOn': 0.1})
li.append(s)
# second model
s = si.Simulator(model, 'dymola', 'case2')
s.addParameters({'con.eOn': 1})
li.append(s)

# Run all cases in parallel
po = Pool()
po.map(simulateCase, li)

# Clean up
shutil.rmtree('case1')
shutil.rmtree('case2')

# Main function
if __name__ == '__main__':
main()

and I keep getting this error:

File "C:/Users/Toshiba/.spyder-py3/temp.py", line 11, in <module>
    import buildingspy.simulate.Simulator as si

ModuleNotFoundError: No module named 'buildingspy'

I already installed the package using pip more than one time and nothing changes.

What am I missing?

This is the source of this code.

Answer 1

That error might be due to having multiple python installations on your computer:
https://docs.python.org/3/installing/#work-with-multiple-versions-of-python-installed-in-parallel

Please add the following lines somewhere to your script (or to a new script) and run it once from Spyder, and once from the console and compare the output:

import sys
print("python: {}".format(sys.version))
# also add the following if running from python 3
from shutil import which
print(which("python"))

Buildingspy has to be installed using pip, I would recommend to install it using the command:

python -m pip install -U https://github.com/lbl-srg/BuildingsPy/archive/master.zip

Anaconda adds an Anaconda prompt to the Start menu, use that to make sure the path to python.exe is correct.

Once BuildingsPy is installed correctly, you will run into the problem that on Windows multiprocessing will not work from Spyder (or, from IPython/Jupyter), please also read this issue:
https://github.com/lbl-srg/BuildingsPy/issues/179
You will have to run your script from the command line.