Fix import issuse by importing directly from relevant modules

src/lending/book.py

@@ -3,7 +3,7 @@
 from protean import handle
 from protean.fields import String
 
-from lending import HoldPlaced
+from lending.patron import HoldPlaced
 from lending.domain import lending
 
 

src/lending/checkout_service.py

@@ -2,7 +2,8 @@
 from protean.exceptions import ValidationError
 from protean.fields import Identifier
 
-from lending import Book, BookType, Checkout, HoldStatus, Patron, PatronType
+from lending.patron import Checkout, HoldStatus, Patron, PatronType
+from lending.book import Book, BookType
 from lending.domain import lending
 
 

src/lending/daily_sheet_service.py

@@ -1,7 +1,8 @@
 from datetime import date
 
-from lending import Book, HoldStatus, Patron
+from lending.book import Book
 from lending.domain import lending
+from lending.patron import HoldStatus, Patron
 
 
 @lending.domain_service(part_of=[Patron, Book])

src/lending/holding_service.py

@@ -4,17 +4,8 @@
 from protean.exceptions import ValidationError
 from protean.fields import Identifier
 
-from lending import (
-    Book,
-    BookStatus,
-    BookType,
-    Hold,
-    HoldPlaced,
-    HoldStatus,
-    HoldType,
-    Patron,
-    PatronType,
-)
+from lending.book import Book, BookStatus, BookType
+from lending.patron import Hold, HoldPlaced, HoldStatus, HoldType, Patron, PatronType
 from lending.domain import lending