Add type annotations to pl_bolts/__init__.py (Lightning-Universe#435)

* Run mypy on pl_bolts only

* Update mypy config

* Add type hints to pl_bolts/__init__.py

* mypy

Co-authored-by: Jirka Borovec <jirka.borovec@seznam.cz>

docs/source/conf.py

@@ -28,7 +28,7 @@
 PATH_ROOT = os.path.join(PATH_HERE, '..', '..')
 sys.path.insert(0, os.path.abspath(PATH_ROOT))
 
-builtins.__LIGHTNING_BOLT_SETUP__ = True
+builtins.__LIGHTNING_BOLT_SETUP__: bool = True
 
 SPHINX_MOCK_REQUIREMENTS = int(os.environ.get('SPHINX_MOCK_REQUIREMENTS', True))
 

pl_bolts/__init__.py

@@ -33,9 +33,9 @@
 try:
     # This variable is injected in the __builtins__ by the build process.
     # It used to enable importing subpackages when the binaries are not built.
-    __LIGHTNING_BOLT_SETUP__
+    _ = None if __LIGHTNING_BOLT_SETUP__ else None
 except NameError:
-    __LIGHTNING_BOLT_SETUP__ = False
+    __LIGHTNING_BOLT_SETUP__: bool = False
 
 if __LIGHTNING_BOLT_SETUP__:
     import sys  # pragma: no-cover

setup.cfg

@@ -70,9 +70,6 @@ files = pl_bolts, tests
 disallow_untyped_defs = True
 ignore_missing_imports = True
 
-[mypy-pl_bolts.*]
-ignore_errors = True
-
 [mypy-pl_bolts.callbacks.*]
 ignore_errors = True
 

setup.py

@@ -14,7 +14,7 @@
 # http://blog.ionelmc.ro/2014/05/25/python-packaging/
 
 PATH_ROOT = os.path.dirname(__file__)
-builtins.__LIGHTNING_BOLT_SETUP__ = True
+builtins.__LIGHTNING_BOLT_SETUP__: bool = True
 
 import pl_bolts  # noqa: E402