Opportunistically depend on typing extensions

README.md

@@ -6,7 +6,9 @@ Result is a simple, type annotated Result type for Python 3.6+ inspired by [Rust
 
 The idea is that a result value can be either `Ok(value)` or `Err(error)`, with a way to differentiate between the two. `Ok` and `Err` are both classes wrapping an arbitrary value. `Result[T, E]` is a generic type alias for `typing.Union[Ok[T], Err[E]]`.
 
-Requires Python 3.6 or higher!
+Requires Python 3.8 or higher!
+
+NB: If you are using a Python version lower than 3.10, you will have to install `typing_extensions`!
 
 
 ### Caveats

resultify/__init__.py

@@ -1,6 +1,18 @@
 from time import sleep
 from functools import wraps
-from typing import Any, Generic, ParamSpec, TypeVar, Union, Type, Callable
+
+try:
+    from typing import Any, Generic, ParamSpec, TypeVar, Union, Type, Callable
+except ImportError:
+    from typing_extensions import (
+        Any,
+        Generic,
+        ParamSpec,
+        TypeVar,
+        Union,
+        Type,
+        Callable,
+    )
 
 T = TypeVar("T", bound=Any)  # Success type
 E = TypeVar("E", bound=Exception)  # Error type