Type check with mypy.

Lint with ruff.

README.md

@@ -1,5 +1,7 @@
 # Reloading
 [![CI](https://github.com/nneskildsf/reloading/actions/workflows/CI.yml/badge.svg)](https://github.com/nneskildsf/reloading/actions/workflows/CI.yml)
+[![Checked with mypy](https://www.mypy-lang.org/static/mypy_badge.svg)](https://mypy-lang.org/)
+[![Linting: Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
 
 A Python utility to reload a function or loop body from source on each iteration without losing state.
 

pyproject.toml

@@ -38,6 +38,8 @@ development = [
   "nbformat",
   "flake8",
   "pyright",
+  "mypy",
+  "ruff",
   "build",
 ]
 

reloading/reloading.py

@@ -66,7 +66,7 @@ def reloading(fn_or_seq_or_bool: Optional[
             source before each invocation or iteration, respectively.
     """
     if fn_or_seq_or_bool is not None:
-        if isinstance(fn_or_seq_or_bool, Callable):
+        if callable(fn_or_seq_or_bool):
             return _reloading_function(fn_or_seq_or_bool)
         elif (isinstance(fn_or_seq_or_bool, Iterable) or
               isinstance(fn_or_seq_or_bool, bool)):

reloading/test_reloading.py

@@ -28,8 +28,8 @@ def run_and_update_source(init_src, updated_src=None, update_after=0.5):
                 f.flush()
 
         try:
-            stdout, _ = proc.communicate(timeout=2)
-            stdout = stdout.decode("utf-8")
+            stdout_bytes, _ = proc.communicate(timeout=2)
+            stdout = stdout_bytes.decode("utf-8")
             has_error = False
         except Exception:
             stdout = ""