This article covers the importing of a Python package that we don't have installed on Mitto, such as pandas or NumPy. In this case, we need to use a virtual environment. The virtual environment will need to be created manually on your Mitto before this will work. In this case I created a new directory in /var/mitto/data/ called testenv, then I ran virtualenv -p /usr/bin/python3 testenv/, then source testenv/bin/activate, and finally I used pip to install pandas and numpy.

With my virtual environment set up, the following script creates a small dataframe and writes it to a file at: /var/mitto/data/also_written_by_python.txt.

import numpy as np
import pandas as pd

s = pd.Series([1, 3, 5, np.nan, 6, 8])

f = open("/var/mitto/data/also_written_by_python.txt", "w")

In order to run this script via the virtual environment, we'll execute it using python  from our virtual environment like this:

    "cmd": "/var/mitto/data/testenv/bin/python /var/mitto/data/",
    "shell": true

The resulting file should look like this:

$ cat also_written_by_python.txt 
0    1.0
1    3.0
2    5.0
3    NaN
4    6.0
5    8.0