diff --git a/scripts/plot_bd_models.py b/scripts/plot_bd_models.py
index 6e67a1a3..6d4fb1f8 100644
--- a/scripts/plot_bd_models.py
+++ b/scripts/plot_bd_models.py
@@ -1,3 +1,4 @@
+import importlib
 from pathlib import Path
 
 import matplotlib as mpl
@@ -33,11 +34,9 @@ def plot_bd_models(
     simpletitle: bool = typer.Option(False, help="Make title simple"),
     birth2d: bool = typer.Option(False, help="Make 2D plot for birth rate"),
 ) -> None:
-    try:
-        import PySide6
-
+    if importlib.util.find_spec("PySide6") is not None:
         mpl.use("QtAgg")
-    except ImportError:
+    else:
         mpl.use("TkAgg")
 
     with config.open("r") as f:
@@ -85,7 +84,7 @@ def plot_bd_models(
         else:
             ax = fig.add_subplot(111, projection="3d")
         if simpletitle:
-            ax.set_title(f"Birth function")  # type: ignore
+            ax.set_title("Birth function")  # type: ignore
         else:
             ax.set_title(f"{type(birth_model).__name__} Birth function")  # type: ignore
         if birth2d:
@@ -110,9 +109,8 @@ def plot_bd_models(
     if yes or typer.confirm("Plot survivor ship curve?"):
         fig = plt.figure(figsize=(5, 10))
         ax = fig.add_subplot(111)
-        ax.set_title(
-            f"{type(birth_model).__name__} Survivor ship when energy={survivorship_energy}"
-        )
+        tname = type(birth_model).__name__
+        ax.set_title(f"{tname} Survivor ship when energy={survivorship_energy}")
         vis_survivorship(ax=ax, hazard_fn=hazard_model, age_max=age_max, initial=True)
         plt.show()
 
diff --git a/src/emevo/analysis/qt_widget.py b/src/emevo/analysis/qt_widget.py
index 55603fe0..64358a61 100644
--- a/src/emevo/analysis/qt_widget.py
+++ b/src/emevo/analysis/qt_widget.py
@@ -2,7 +2,6 @@
 """
 from __future__ import annotations
 
-import dataclasses
 import sys
 from collections import deque
 from collections.abc import Iterable
diff --git a/src/emevo/environments/moderngl_vis.py b/src/emevo/environments/moderngl_vis.py
index 8d78f864..d2787c45 100644
--- a/src/emevo/environments/moderngl_vis.py
+++ b/src/emevo/environments/moderngl_vis.py
@@ -4,7 +4,7 @@
 """
 from __future__ import annotations
 
-from typing import Any, Callable, ClassVar
+from typing import Callable, ClassVar
 
 import jax.numpy as jnp
 import moderngl as mgl
diff --git a/src/emevo/exp_utils.py b/src/emevo/exp_utils.py
index e2f4a3f9..43e99367 100644
--- a/src/emevo/exp_utils.py
+++ b/src/emevo/exp_utils.py
@@ -333,7 +333,7 @@ def finalize(self) -> None:
             ]
             pq.write_table(
                 pa.Table.from_pylist(profile_and_rewards),
-                self.logdir.joinpath(f"profile_and_rewards.parquet"),
+                self.logdir.joinpath("profile_and_rewards.parquet"),
             )
 
         if self.mode in [LogMode.FULL, LogMode.REWARD_AND_LOG]:
diff --git a/src/emevo/visualizer.py b/src/emevo/visualizer.py
index 4508d906..2ec6945c 100644
--- a/src/emevo/visualizer.py
+++ b/src/emevo/visualizer.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from os import PathLike
-from typing import Any, Protocol, TypeVar
+from typing import Protocol, TypeVar
 
 from numpy.typing import NDArray