diff --git a/examples/charts/charts/agents.py b/examples/charts/charts/agents.py
index 3bc481d8..1255bb08 100644
--- a/examples/charts/charts/agents.py
+++ b/examples/charts/charts/agents.py
@@ -9,8 +9,10 @@
     Center for Connected Learning and Computer-Based Modeling,
     Northwestern University, Evanston, IL.
 """
+
 from mesa.spaces import CellAgent
 
+
 class Bank:
     """Note that the Bank class is not a Mesa Agent, but just a regular Python
     class. This is because there is only one bank in this model, and it does not
diff --git a/examples/color_patches/color_patches/model.py b/examples/color_patches/color_patches/model.py
index a180e10c..c84c3a95 100644
--- a/examples/color_patches/color_patches/model.py
+++ b/examples/color_patches/color_patches/model.py
@@ -74,8 +74,7 @@ def __init__(self, width=20, height=20):
         # for (contents, col, row) in self._grid.coord_iter():
         # replaced content with _ to appease linter
         for cell in self._grid.all_cells:
-            agent = ColorCell(self, ColorCell.OPINIONS[self.random.randrange(0, 16)]
-            )
+            agent = ColorCell(self, ColorCell.OPINIONS[self.random.randrange(0, 16)])
             agent.move_to(cell)
 
         self.running = True
diff --git a/examples/epstein_civil_violence/epstein_civil_violence/agent.py b/examples/epstein_civil_violence/epstein_civil_violence/agent.py
index 3d626990..f98a4db2 100644
--- a/examples/epstein_civil_violence/epstein_civil_violence/agent.py
+++ b/examples/epstein_civil_violence/epstein_civil_violence/agent.py
@@ -2,8 +2,8 @@
 
 import mesa
 
-class EpsteinAgent(mesa.spaces.CellAgent):
 
+class EpsteinAgent(mesa.spaces.CellAgent):
     def update_neighbors(self):
         """
         Look around and see who my neighbors are
@@ -91,7 +91,6 @@ def step(self):
             new_cell = self.random.choice(self.empty_neighbors)
             self.move_to(new_cell)
 
-
     def update_estimated_arrest_probability(self):
         """
         Based on the ratio of cops to actives in my neighborhood, estimate the
@@ -157,4 +156,3 @@ def step(self):
         if self.model.movement and self.empty_neighbors:
             new_pos = self.random.choice(self.empty_neighbors)
             self.move_to(new_pos)
-
diff --git a/examples/epstein_civil_violence/epstein_civil_violence/model.py b/examples/epstein_civil_violence/epstein_civil_violence/model.py
index 017185c9..3b7d69b1 100644
--- a/examples/epstein_civil_violence/epstein_civil_violence/model.py
+++ b/examples/epstein_civil_violence/epstein_civil_violence/model.py
@@ -59,7 +59,9 @@ def __init__(
         self.max_iters = max_iters
         self.iteration = 0
 
-        self.grid = mesa.spaces.OrthogonalMooreGrid((width, height), capacity=1,torus=True)
+        self.grid = mesa.spaces.OrthogonalMooreGrid(
+            (width, height), capacity=1, torus=True
+        )
 
         model_reporters = {
             "Quiescent": lambda m: self.count_type_citizens(m, "Quiescent"),
@@ -119,15 +121,22 @@ def count_type_citizens(model, condition, exclude_jailed=True):
         citizens = model.agents_by_type[Citizen]
 
         if exclude_jailed:
-            return len([c for c in citizens if (c.condition == condition) and (c.jail_sentence==0)])
+            return len(
+                [
+                    c
+                    for c in citizens
+                    if (c.condition == condition) and (c.jail_sentence == 0)
+                ]
+            )
         else:
-            return len([c for c in citizens if c.condition==condition])
+            return len([c for c in citizens if c.condition == condition])
+
     @staticmethod
     def count_jailed(model):
         """
         Helper method to count jailed agents.
         """
-        return len([a for a in model.agents_by_type[Citizen] if a.jail_sentence > 0 ])
+        return len([a for a in model.agents_by_type[Citizen] if a.jail_sentence > 0])
 
     @staticmethod
     def count_cops(model):