Error Ubuntu 18 Installation

[meldiwin]

Defaulting to user installation because normal site-packages is not writeable
Collecting topopt
Using cached topopt-0.0.1a1.tar.gz (19 kB)
ERROR: Command errored out with exit status 1:
command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-fxyjh6bh/topopt/setup.py'"'"'; file='"'"'/tmp/pip-install-fxyjh6bh/topopt/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(file);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-k3_w010s
cwd: /tmp/pip-install-fxyjh6bh/topopt/
Complete output (9 lines):
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-install-fxyjh6bh/topopt/setup.py", line 6, in
import topopt
File "/tmp/pip-install-fxyjh6bh/topopt/topopt/init.py", line 6, in
from . import problems
File "/tmp/pip-install-fxyjh6bh/topopt/topopt/problems.py", line 8, in
import cvxopt
ModuleNotFoundError: No module named 'cvxopt'
----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
WARNING: You are using pip version 20.1.1; however, version 20.2.4 is available.
You should consider upgrading via the '/usr/bin/python3 -m pip install --upgrade pip' command.

[zfergus]

It looks like the CVXOPT python package is not installed. It is used to solve sparse linear systems. You can install it using pip install cvxopt.