Add PEP484 Annotations

The Issue

The Brownie code base does not make any use of PEP484 annotations, and sometimes variable types are changed mid-function. This makes for less readable code which can be discouraging for would-be new contributors.

Implementing annotation is an important step towards taking Brownie out of beta. It should be a multi-stage process, starting with the most developed areas of the code.

In this first step to an annotated code base, the targets are:

• brownie/*.py
• brownie/network/*.py
• brownie/project/*.py

Completion Goals

1. Running MyPy with the following configuration file should complete without any errors.

[mypy]
disallow_untyped_defs = True
ignore_missing_imports = True
follow_imports = silent
files = brownie/*.py,brownie/network,brownie/project

1. API Documentation must be updated. Each function should include the same annotations as the source code. The following files will require updating:

   • docs/api-brownie.rst
   • docs/api-network.rst
   • docs/api-project.rst

[ghost]

@iamdefinitelyahuman thanks for the opportunity to contribute to this project. I’ll get started with a work in progress pull request shortly to continue the discussion there. Looking forward to working with you.

[iamdefinitelyahuman]

Thanks @crawfordleeds !