Upgrade to Mypy 1.3.0 (old: 0.991). Fix compatibility problems with Mypy. Add type hints to bfxapi.websocket.handlers.

bfxapi/websocket/subscriptions.py

@@ -1,20 +1,5 @@
-from typing import TypedDict, Union, Literal, Optional
-
-_Channel = Literal[
-    "ticker",
-    "trades",
-    "book",
-    "candles",
-    "status"
-]
-
-_Header = TypedDict("_Header", {
-    "event": Literal["subscribed"],
-    "channel": _Channel,
-    "chanId": int
-})
-
-Subscription = Union[_Header, "Ticker", "Trades", "Book", "Candles", "Status"]
+from typing import TypedDict, \
+    Union, Literal, Optional
 
 class Ticker(TypedDict):
     subId: str
@@ -43,3 +28,33 @@ class Candles(TypedDict):
 class Status(TypedDict):
     subId: str
     key: str
+
+Subscription = Union["_Ticker", "_Trades", "_Book", "_Candles", "_Status"]
+
+_Channel = Literal["ticker", "trades", "book", "candles", "status"]
+
+_Header = TypedDict("_Header", {
+    "event": Literal["subscribed"],
+    "channel": _Channel,
+    "chanId": int
+})
+
+#pylint: disable-next=inherit-non-class
+class _Ticker(Ticker, _Header):
+    pass
+
+#pylint: disable-next=inherit-non-class
+class _Trades(Trades, _Header):
+    pass
+
+#pylint: disable-next=inherit-non-class
+class _Book(Book, _Header):
+    pass
+
+#pylint: disable-next=inherit-non-class
+class _Candles(Candles, _Header):
+    pass
+
+#pylint: disable-next=inherit-non-class
+class _Status(Status, _Header):
+    pass