Another analysis

Let’s say that we have another directory analysis2, that contains another but similar dataset to analysis1/data/brownian.csv. Now that we’ve structured our software into a python package, we would like to reuse that package for our second analysis.

In the directory analysis2/, let’s simply write a script analysis2.py, that imports the tstools package created in the previous section.

analysis2/
      analysis2.py
      data/
  	      data_analysis2.csv

# analysis2/analysis2.py
import numpy as np

import tstools

timeseries = np.genfromtxt("./data/data_analysis2.csv", delimiter=",")
fig, ax = tstools.plot_trajectory_subset(timeseries, 0, 50)

$ python analysis2.py
Traceback (most recent call last):
  File "<stdin>", line 10, in <module>
  File "<stdin>", line 5, in main
ModuleNotFoundError: No module named 'tstools'

At the moment lives in the directory analysis1/, and, unfortunately, Python cannot find it! How can we tell Python where our package is?