Fix on mypy

botmaker/base.py

@@ -0,0 +1,16 @@
+from abc import abstractmethod
+from typing import Optional
+
+from typing_extensions import Protocol
+
+
+class BaseClient(Protocol):
+    @abstractmethod
+    def check_whatsapp_contact(
+        self, channel: str, phone_number: str
+    ) -> Optional[str]:
+        ...
+
+    @abstractmethod
+    def post(self, endpoint: str, data: dict, **kwargs) -> dict:
+        ...

botmaker/client.py

@@ -3,12 +3,13 @@
 
 import requests
 
+from .base import BaseClient
 from .exc import BotmakerException, InvalidAuth
 from .helpers import sanitize_phone_number
 from .resources import Message, Resource, TemplateMessage
 
 
-class Client:
+class Client(BaseClient):
     BASE_URL = 'https://go.botmaker.com/api/v1.0'
 
     messages = Message

botmaker/resources/base.py

@@ -1,10 +1,14 @@
+from botmaker.base import BaseClient
 from botmaker.exc import InvalidPhoneNumber
 from botmaker.helpers import sanitize_phone_number
 
 
 class Resource:
-    _client = None
-    _endpoint = None
+    _client: BaseClient
+    _endpoint: str
+
+    def __init__(self, *_, **__):
+        ...
 
     @classmethod
     def commonCreate(

setup.py

@@ -5,6 +5,7 @@
 install_requirements = [
     'requests>=2.21.0,<2.22.0',
     'dataclasses>=0.6;python_version<"3.7"',
+    'typing-extensions>=3.7,<3.8',
 ]
 
 version = SourceFileLoader('version', 'botmaker/version.py').load_module()