Add mypy and some dependencies

Author: jkimbo

app/github.py

@@ -9,7 +9,22 @@
 API_BASE = "https://api.github.com"
 
 
-def has_signature(comment: dict, slug: str) -> bool:
+class GithubUser(typing.TypedDict):
+    login: str
+
+
+class GithubComment(typing.TypedDict):
+    url: str
+    body: str
+    user: GithubUser
+
+
+class GithubLabel(typing.TypedDict):
+    name: str
+    url: str
+
+
+def has_signature(comment: GithubComment, slug: str) -> bool:
     return (
         comment["user"]["login"] in ["github-actions[bot]", "botberry"]
         and SIGNATURE_TEMPLATE.format(slug=slug) in comment["body"]
@@ -28,15 +43,15 @@ def get_labels_link(pr_number: int) -> str:
     return API_BASE + url
 
 
-def get_comments(pr_number: int) -> typing.List[dict]:
+def get_comments(pr_number: int) -> typing.List[GithubComment]:
     comments_link = get_comments_link(pr_number)
 
     response = httpx.get(comments_link)
 
     return response.json()
 
 
-def get_labels(pr_number) -> typing.List[dict]:
+def get_labels(pr_number) -> typing.List[GithubLabel]:
     labels_link = get_labels_link(pr_number)
 
     response = httpx.get(labels_link)
@@ -78,10 +93,9 @@ def update_labels(pr_number: int, release_info: typing.Optional[ReleaseInfo]):
         labels_to_add.add(new_release_label)
 
     labels_url = get_labels_link(pr_number)
-    current_labels = get_labels(pr_number)
 
     current_labels_url_by_name = {
-        label["name"]: label["url"] for label in current_labels
+        label["name"]: label["url"] for label in get_labels(pr_number)
     }
 
     current_labels = set(current_labels_url_by_name.keys())

poetry.lock

@@ -11,6 +11,7 @@ strawberry-graphql = "^0.44.12"
 uvicorn = "^0.13.3"
 starlette = "^0.14.1"
 httpx = "^0.16.1"
+mypy = "^0.812"
 
 [tool.poetry.dev-dependencies]
 flake8 = "^3.8.4"