Fix formatting with black

backend/app/routers/contact.py

@@ -7,38 +7,48 @@ from app.dependencies import get_db
 
 router = APIRouter()
 
+
 # Existing routes
 @router.get("/", response_model=List[ContactPerson])
 async def get_contacts(db: Session = Depends(get_db)):
     return db.query(ContactPersonModel).all()
 
+
 @router.post("/", response_model=ContactPerson, status_code=status.HTTP_201_CREATED)
 async def create_contact(contact: ContactPersonCreate, db: Session = Depends(get_db)):
-    if db.query(ContactPersonModel).filter(ContactPersonModel.email == contact.email).first():
+    if (
+        db.query(ContactPersonModel)
+        .filter(ContactPersonModel.email == contact.email)
+        .first()
+    ):
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
-            detail="This contact already exists."
+            detail="This contact already exists.",
         )
 
     db_contact = ContactPersonModel(
         firstname=contact.firstname,
         lastname=contact.lastname,
         phone_number=contact.phone_number,
-        email=contact.email
+        email=contact.email,
     )
     db.add(db_contact)
     db.commit()
     db.refresh(db_contact)
     return db_contact
 
+
 # New routes
 @router.put("/{contact_id}", response_model=ContactPerson)
-async def update_contact(contact_id: int, contact: ContactPersonUpdate, db: Session = Depends(get_db)):
-    db_contact = db.query(ContactPersonModel).filter(ContactPersonModel.id == contact_id).first()
+async def update_contact(
+    contact_id: int, contact: ContactPersonUpdate, db: Session = Depends(get_db)
+):
+    db_contact = (
+        db.query(ContactPersonModel).filter(ContactPersonModel.id == contact_id).first()
+    )
     if not db_contact:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND,
-            detail="Contact not found."
+            status_code=status.HTTP_404_NOT_FOUND, detail="Contact not found."
         )
     for key, value in contact.dict(exclude_unset=True).items():
         setattr(db_contact, key, value)
@@ -46,14 +56,16 @@ async def update_contact(contact_id: int, contact: ContactPersonUpdate, db: Sess
     db.refresh(db_contact)
     return db_contact
 
+
 @router.delete("/{contact_id}", status_code=status.HTTP_204_NO_CONTENT)
 async def delete_contact(contact_id: int, db: Session = Depends(get_db)):
-    db_contact = db.query(ContactPersonModel).filter(ContactPersonModel.id == contact_id).first()
+    db_contact = (
+        db.query(ContactPersonModel).filter(ContactPersonModel.id == contact_id).first()
+    )
     if not db_contact:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND,
-            detail="Contact not found."
+            status_code=status.HTTP_404_NOT_FOUND, detail="Contact not found."
         )
     db.delete(db_contact)
     db.commit()
-    return
+    return