Gaussian distribution is failing

[lollllcat]

To reproduce the error, the easiest way is
" python3 CLI.py Charm/models_charm/hill_marty_extended.charm ".

All the models including Gaussian distribution are not working (for those can run like dark_silicon_symmetric etc the Gaussian part is actually commented out).

Some attempts to solve (yet still not succeed at this moment):

1. Some dependencies may need to be updated to Python 3 version, e.g. mcerp library in Charm/models/uncertainty_models.py.
2. There are some import errors due to the interchange of camel case and snake case. e.g.
   Charm/base/eval_functions.py line 9 should import Uncertainty_models instead of UncertaintyModel,
   Charm/utils/options.py line 3 should import math_models instead of MathModel
3. Charm/models/math_models.py line 1 may need to change "base.eval_functions" to "Charm.base.eval_functions"
4. under the Charm/utils directory, not entirely sure the difference between charm_options.py and options.py

[Weil0ng]

Just to record what we discussed yesterday, so the following would work:

Use python 2.7.17
Downgrade sympy to 1.1.1