feat: add type information for all cloudevent member functions (cloudevents#173)

* feat: add type information for all cloudevent member functions

Signed-off-by: Alexander Tkachev <sasha64sasha@gmail.com>

* docs: update changelog

Signed-off-by: Alexander Tkachev <sasha64sasha@gmail.com>

Author: sasha-tkachev

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 - Added `.get` accessor for even properties ([#165])
+- Added type information for all event member functions ([#173])
 
 ### Changed
 - Code quality and styling tooling is unified and configs compatibility is ensured ([#167])
@@ -155,3 +156,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#168]: https://github.com/cloudevents/sdk-python/pull/168
 [#169]: https://github.com/cloudevents/sdk-python/pull/169
 [#170]: https://github.com/cloudevents/sdk-python/pull/170
+[#173]: https://github.com/cloudevents/sdk-python/pull/173

cloudevents/http/event.py

@@ -67,12 +67,12 @@ def __init__(self, attributes: typing.Dict[str, str], data: typing.Any = None):
                 f"Missing required keys: {required_set - self._attributes.keys()}"
             )
 
-    def __eq__(self, other):
+    def __eq__(self, other: typing.Any) -> bool:
         return self.data == other.data and self._attributes == other._attributes
 
     # Data access is handled via `.data` member
     # Attribute access is managed via Mapping type
-    def __getitem__(self, key):
+    def __getitem__(self, key: str) -> typing.Any:
         return self._attributes[key]
 
     def get(
@@ -91,20 +91,20 @@ def get(
         """
         return self._attributes.get(key, default)
 
-    def __setitem__(self, key, value):
+    def __setitem__(self, key: str, value: typing.Any) -> None:
         self._attributes[key] = value
 
-    def __delitem__(self, key):
+    def __delitem__(self, key: str) -> None:
         del self._attributes[key]
 
-    def __iter__(self):
+    def __iter__(self) -> typing.Iterator[typing.Any]:
         return iter(self._attributes)
 
-    def __len__(self):
+    def __len__(self) -> int:
         return len(self._attributes)
 
-    def __contains__(self, key):
+    def __contains__(self, key: str) -> bool:
         return key in self._attributes
 
-    def __repr__(self):
+    def __repr__(self) -> str:
         return str({"attributes": self._attributes, "data": self.data})