implemented mypy, redesigned Block & Package class

 - replaced dict with OrderedDict for attribute types in Block & Package
 - removed 'type(key) is str' from Block and Package
 - redesigned Block class to take optional dict or list of ModelElements as default args
 - redesigned Package class to take optional dict or list of ModelElements as default args
 - un-stringified uuid's
 - added script for mypy in travis
 - replaced pep8 with black

.travis.yml

@@ -5,23 +5,27 @@ python:
   # - "2.6"
   # - "2.7"
   # - "3.3"
-  - "3.4"
-  - "3.5"
-  - "3.5-dev"  # 3.5 development branch
+  # - "3.4"
+  # - "3.5"
+  # - "3.5-dev"  # 3.5 development branch
   - "3.6"
   - "3.6-dev"  # 3.6 development branch
   # - "3.7-dev"  # 3.7 development branch
 # command to install dependencies
 install:
   - pip install --upgrade pip
+  - pip install black
   - pip install coverage
+  - pip install mypy
   - pip install python-coveralls
   - pip install pytest
+  - pip install pytest-black
   - pip install pytest-cov
-  - pip install pytest-pep8
   - pip install -r requirements.txt
-script:
+before_script:
   - python setup.py install
-  - pytest -v --cov-report term-missing --cov=sysml/ --pep8 # or py.test for Python versions 3.5 and below
+script:
+  - pytest -v --cov-report term-missing --cov=sysml/ --black # or py.test for Python versions 3.5 and below
+  - mypy sysml/ --ignore-missing-imports
 after_success:
   - coveralls

setup.py

@@ -2,9 +2,9 @@
 
 setup(
     # ...,
-    name='sysml',
-    version='0.1.0',
-    packages=['sysml'],
+    name="sysml",
+    version="0.1.0",
+    packages=["sysml"],
     author="Sean Marquez",
     author_email="capsulecorplab@gmail.com",
     description="A Python package for the Systems Modeling Language (SysML)",
@@ -14,8 +14,8 @@
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",
     ],
-    setup_requires=['pytest-runner'],
-    install_requires=['pint', 'pyyaml', 'uuid'],
-    tests_require=['pytest'],
+    setup_requires=["pytest-runner"],
+    install_requires=["pint", "pyyaml", "uuid"],
+    tests_require=["pytest"],
     # ...,
 )

sysml/__init__.py

@@ -1,3 +1,4 @@
 from sysml.element import *
 from sysml.system import *
-__version__ = '0.1.0'
+
+__version__ = "0.1.0"