diff --git a/examples/open_source_examples/openrouter.py b/examples/open_source_examples/openrouter.py
index 5589b6b..9f38dd2 100644
--- a/examples/open_source_examples/openrouter.py
+++ b/examples/open_source_examples/openrouter.py
@@ -31,6 +31,7 @@ data = [
 
 
 if __name__ == "__main__":
+
     class UserDetail(BaseModel):
         name: str = Field(description="Name extracted from the text")
         age: int = Field(description="Age extracted from the text")
@@ -41,16 +42,18 @@ if __name__ == "__main__":
     for content in data:
         MaybeUser = Maybe(UserDetail)
         user = client.chat.completions.create(
-            response_model=MaybeUser, model="teknium/openhermes-2.5-mistral-7b", messages=[
-            {
-                "role": "system",
-                "content": f"You are an expert at outputting json. You always output valid json based on this schema: {MaybeUser.model_json_schema()}",
-            },
-            {
-                "role": "user",
-                "content": f"Extract the user details from the following text: {content}. Match your response the correct schema",
-            },
-        ]
+            response_model=MaybeUser,
+            model="teknium/openhermes-2.5-mistral-7b",
+            messages=[
+                {
+                    "role": "system",
+                    "content": f"You are an expert at outputting json. You always output valid json based on this schema: {MaybeUser.model_json_schema()}",
+                },
+                {
+                    "role": "user",
+                    "content": f"Extract the user details from the following text: {content}. Match your response the correct schema",
+                },
+            ],
         )
         # Output the error or the result.
         if user.error:
diff --git a/examples/open_source_examples/perplexity.py b/examples/open_source_examples/perplexity.py
index e28ada2..aecd9c8 100644
--- a/examples/open_source_examples/perplexity.py
+++ b/examples/open_source_examples/perplexity.py
@@ -59,7 +59,7 @@ if __name__ == "__main__":
             messages=[
                 {
                     "role": "system",
-                    "content": f"You are an expert at outputting json. You always output valid JSON based on the pydantic schema given to you.",
+                    "content": "You are an expert at outputting json. You always output valid JSON based on the pydantic schema given to you.",
                 },
                 {
                     "role": "user",
diff --git a/examples/vision/run.py b/examples/vision/run.py
index ce74985..49c76ec 100644
--- a/examples/vision/run.py
+++ b/examples/vision/run.py
@@ -1,22 +1,23 @@
 import instructor
 from openai import OpenAI
-from typing import Iterable
 from pydantic import BaseModel
 import base64
 
 client = instructor.patch(OpenAI(), mode=instructor.function_calls.Mode.MD_JSON)
 
+
 class Circle(BaseModel):
     x: int
     y: int
     color: str
 
+
 def encode_image(image_path):
     with open(image_path, "rb") as image_file:
-        return base64.b64encode(image_file.read()).decode('utf-8')
+        return base64.b64encode(image_file.read()).decode("utf-8")
+
 
 def draw_circle(image_size, num_circles, path):
-
     from PIL import Image, ImageDraw
     import random
 
@@ -25,10 +26,10 @@ def draw_circle(image_size, num_circles, path):
     draw = ImageDraw.Draw(image)
     for _ in range(num_circles):
         # Randomize the circle properties
-        radius = 100#random.randint(10, min(image_size)//5)  # Radius between 10 and 1/5th of the smallest dimension
+        radius = 100  # random.randint(10, min(image_size)//5)  # Radius between 10 and 1/5th of the smallest dimension
         x = random.randint(radius, image_size[0] - radius)
         y = random.randint(radius, image_size[1] - radius)
-        color = ['red', 'black', 'blue', 'green'][random.randint(0, 3)]
+        color = ["red", "black", "blue", "green"][random.randint(0, 3)]
 
         circle_position = (x - radius, y - radius, x + radius, y + radius)
         print(f"Generating circle at {x, y} with color {color}")
@@ -36,8 +37,9 @@ def draw_circle(image_size, num_circles, path):
 
     image.save(path)
 
-img_path = 'circle.jpg'
-draw_circle((1024,1024), 1, img_path)
+
+img_path = "circle.jpg"
+draw_circle((1024, 1024), 1, img_path)
 base64_image = encode_image(img_path)
 
 response = client.chat.completions.create(
@@ -48,16 +50,16 @@ response = client.chat.completions.create(
         {
             "role": "user",
             "content": [
-                {"type": "text", "text": 'find the circle'},
+                {"type": "text", "text": "find the circle"},
                 {
                     "type": "image_url",
-                    "image_url": {
-                        "url": f"data:image/jpeg;base64,{base64_image}"
-                    },
+                    "image_url": {"url": f"data:image/jpeg;base64,{base64_image}"},
                 },
             ],
         }
     ],
 )
 
-print(f"Found circle with center at x: {response.x}, y: {response.y} and color: {response.color}")
\ No newline at end of file
+print(
+    f"Found circle with center at x: {response.x}, y: {response.y} and color: {response.color}"
+)
diff --git a/instructor/function_calls.py b/instructor/function_calls.py
index a16e116..25324b5 100644
--- a/instructor/function_calls.py
+++ b/instructor/function_calls.py
@@ -1,5 +1,4 @@
 import json
-import re 
 from docstring_parser import parse
 from functools import wraps
 from typing import Any, Callable
diff --git a/tests/openai/test_modes.py b/tests/openai/test_modes.py
index 92a1040..618762d 100644
--- a/tests/openai/test_modes.py
+++ b/tests/openai/test_modes.py
@@ -62,7 +62,6 @@ def test_json_mode():
     assert user.age == 25
 
 
-
 def test_markdown_json_mode():
     response = client.chat.completions.create(
         model="gpt-3.5-turbo-1106",
diff --git a/tests/openai/test_multitask.py b/tests/openai/test_multitask.py
index ad42b85..86ff091 100644
--- a/tests/openai/test_multitask.py
+++ b/tests/openai/test_multitask.py
@@ -3,7 +3,7 @@ from openai import OpenAI
 from pydantic import BaseModel
 
 import instructor
-from instructor.function_calls import OpenAISchema, Mode
+from instructor.function_calls import Mode
 
 
 class User(BaseModel):