diff --git a/examples/distributed/offpolicy_distributed_primary.py b/examples/distributed/offpolicy_distributed_primary.py
index 79cccacd..c6b726a6 100644
--- a/examples/distributed/offpolicy_distributed_primary.py
+++ b/examples/distributed/offpolicy_distributed_primary.py
@@ -42,7 +42,9 @@ def collect_experience(agent, parameter_server, experience_server, learner):
 
 
 class MyTrainer(DistributedTrainer):
-    def __init__(self, agent, train_steps, batch_size, init_buffer_size, log_interval=200):
+    def __init__(
+        self, agent, train_steps, batch_size, init_buffer_size, log_interval=200
+    ):
         super(MyTrainer, self).__init__(agent)
         self.train_steps = train_steps
         self.batch_size = batch_size
diff --git a/examples/distributed/onpolicy_distributed_primary.py b/examples/distributed/onpolicy_distributed_primary.py
index 85580fa5..9709f4f1 100644
--- a/examples/distributed/onpolicy_distributed_primary.py
+++ b/examples/distributed/onpolicy_distributed_primary.py
@@ -33,15 +33,8 @@ def get_advantages_returns(rewards, dones, values, gamma=0.99, gae_lambda=1):
         else:
             next_non_terminal = 1.0 - dones[step + 1]
             next_value = values[step + 1]
-        delta = (
-            rewards[step]
-            + gamma * next_value * next_non_terminal
-            - values[step]
-        )
-        last_gae_lam = (
-            delta
-            + gamma * gae_lambda * next_non_terminal * last_gae_lam
-        )
+        delta = rewards[step] + gamma * next_value * next_non_terminal - values[step]
+        last_gae_lam = delta + gamma * gae_lambda * next_non_terminal * last_gae_lam
         advantages[step] = last_gae_lam
     returns = advantages + values
     return advantages.detach(), returns.detach()
@@ -66,7 +59,9 @@ def unroll_trajs(trajectories):
 
 
 class A2C:
-    def __init__(self, env, policy, value, policy_optim, value_optim, grad_norm_limit=0.5):
+    def __init__(
+        self, env, policy, value, policy_optim, value_optim, grad_norm_limit=0.5
+    ):
         self.env = env
         self.policy = policy
         self.value = value
@@ -102,16 +97,14 @@ def update_params(self, trajectories):
         self.value_optim.step()
 
     def get_weights(self):
-        return {
-            "policy": self.policy.state_dict(),
-            "value": self.value.state_dict()
-        }
+        return {"policy": self.policy.state_dict(), "value": self.value.state_dict()}
 
     def load_weights(self, weights):
         self.policy.load_state_dict(weights["policy"])
         self.value.load_state_dict(weights["value"])
 
-class Trajectory():
+
+class Trajectory:
     def __init__(self):
         self.states = []
         self.actions = []
@@ -129,7 +122,8 @@ def add(self, state, action, reward, done):
     def __len__(self):
         return self.__len
 
-class TrajBuffer():
+
+class TrajBuffer:
     def __init__(self, size):
         if size <= 0:
             raise ValueError("Size of buffer must be larger than 0")
@@ -139,20 +133,21 @@ def __init__(self, size):
 
     def is_full(self):
         return self._full
-    
+
     def push(self, traj):
         if not self.is_full():
             self._memory.append(traj)
             if len(self._memory) >= self._size:
                 self._full = True
-        
+
     def get(self, clear=True):
-        out =  copy.deepcopy(self._memory)
+        out = copy.deepcopy(self._memory)
         if clear:
             self._memory = []
             self._full = False
         return out
 
+
 def collect_experience(agent, parameter_server, experience_server, learner):
     current_step = -1
     while not learner.is_completed():
@@ -171,7 +166,7 @@ def collect_experience(agent, parameter_server, experience_server, learner):
                 traj.add(obs, action, reward, done)
                 obs = next_obs
                 if done:
-                    break 
+                    break
             experience_server.push(traj)
             print("pushed a traj")
 
@@ -206,7 +201,7 @@ def train(self, parameter_server, experience_server):
 
 
 master = Master(
-    world_size=N_ACTORS+4,
+    world_size=N_ACTORS + 4,
     address="localhost",
     port=29500,
     proc_start_method="fork",