[Tutor] What is wrong with my Python program that causes it to run but not give results?

[Ben Finney]

Ed Troy <etroy at aeroconsult.com> writes:

> I found a very useful Python program for calculating the Spice
> parameters for a LED. I have Python3 and the various modules loaded
> onto my Ubuntu machine.

Which libraries, specifically, have you installed?

> When I type python LED_model_utf8.py LED_IV.txt, I get an error message:
> edward at ubuntu:~$ python LED_model_utf8.py LED_IV.txt
> Traceback (most recent call last):
>   File "LED_model_utf8.py", line 4, in <module>
>     import matplotlib.pyplot as plt
> ImportError: No module named matplotlib.pyplot

This error implies that there's no library available providing
‘matplotlib’. Have you installed the third-party Matplotlib library,
into the same environment?

-- 
 \        “What if the Hokey Pokey IS what it's all about?” —anonymous |
  `\                                                                   |
_o__)                                                                  |
Ben Finney