fix: Queue.get_nowait with i == 1 (#85)

a_sync/primitives/queue.py

@@ -1,6 +1,6 @@
 import asyncio
 import sys
-from typing import Generic, TypeVar
+from typing import Generic, List, TypeVar, Union, overload
 
 T = TypeVar('T')
 
@@ -11,11 +11,19 @@
 
 class Queue(*bases):
     """The only difference between an a_sync.Queue and an asyncio.Queue is that `get_nowait` can retrn multiple responses."""
-    def get_nowait(self, i: int = 1, can_return_less: bool = False) -> T:
+    @overload
+    def get_nowait(self, i = 1, can_return_less: bool = False) -> T:
+        ...
+    @overload
+    def get_nowait(self, i: int, can_return_less: bool = False) -> List[T]:
+        ...
+    def get_nowait(self, i: int = 1, can_return_less: bool = False) -> Union[T, List[T]]:
         """
         Just like `asyncio.Queue.get_nowait`, but will return `i` items instead of 1.
         Set `can_return_less` to True if you want to receive up to `i` items.
         """
+        if can_return_less and i == 1:
+            raise ValueError("you cant set i == 1 with can_return_less == True")
         values = []
         if i == -1:
             while True:
@@ -30,4 +38,4 @@ def get_nowait(self, i: int = 1, can_return_less: bool = False) -> T:
                 if can_return_less:
                     break
                 raise
-        return values
+        return values[0] if i == 1 else values