Fix gridpoints

Grid points were only visible in exported video files, but not during
live view.

src/robofish/io/file.py

@@ -15,7 +15,6 @@
 # email andi.gerken@gmail.com
 # -----------------------------------------------------------
 
-from pytest import skip
 import robofish.io
 from robofish.io.entity import Entity
 import h5py
@@ -259,7 +258,6 @@ class File(h5py.File):
         return self
 
     def __exit__(self, type, value, traceback):
-
         # Check if the context was left under normal circumstances
         if (hasattr(self, "closed") and not self.closed) and (
             type,
@@ -933,15 +931,6 @@ class File(h5py.File):
             # Plotting outside of the figure to have the label
             ax.plot([550, 600], [550, 600], lw=5, c=this_c, label=fish_id)
 
-        # ax.scatter(
-        #     [poses[:, skip_timesteps, 0]],
-        #     [poses[:, skip_timesteps, 1]],
-        #     marker="h",
-        #     c="black",
-        #     s=ms,
-        #     label="Start",
-        #     zorder=5,
-        # )
         ax.scatter(
             [poses[:, -1, 0]],
             [poses[:, -1, 1]],
@@ -1025,10 +1014,6 @@ class File(h5py.File):
             plt.plot([], [], lw=options["linewidth"], zorder=0)[0]
             for _ in range(n_entities)
         ]
-        points = [
-            plt.scatter([], [], marker="x", color="k"),
-            plt.plot([], [], linestyle="dotted", alpha=0.5, color="k", zorder=0)[0],
-        ]
         categories = [entity.attrs.get("category", None) for entity in self.entities]
         entity_polygons = [
             patches.Polygon(shape_vertices(options["entity_scale"]), facecolor=color)
@@ -1053,9 +1038,12 @@ class File(h5py.File):
         )
         xv, yv = np.meshgrid(x, y)
 
-        grid_points = plt.scatter(xv, yv, c="gray", s=1.5)
+        points = [
+            plt.scatter([], [], marker="x", color="k"),
+            plt.plot([], [], linestyle="dotted", alpha=0.5, color="k", zorder=0)[0],
+            plt.scatter(xv, yv, c="gray", s=1.5),
+        ]
 
-        # border = plt.plot(border_vertices[0], border_vertices[1], "k")
         border = patches.Polygon(border_vertices.T, facecolor="w", zorder=-1)
 
         def title(file_frame: int) -> str:
@@ -1146,7 +1134,7 @@ class File(h5py.File):
                         [options["view_size"], min_view + options["margin"]]
                     )
 
-                    if not np.isnan(min_view).any() and not new_view_size is np.nan:
+                    if not np.isnan(min_view).any() and new_view_size is not np.nan:
                         self.middle_of_swarm = options[
                             "slow_view"
                         ] * self.middle_of_swarm + (1 - options["slow_view"]) * np.mean(