Use from clause when re-raising exceptions

Author: Cito

dbutils/persistent_db.py

@@ -210,10 +210,11 @@ def connection(self, shareable=False):  # noqa: ARG002
         """
         try:
             con = self.thread.connection
-        except AttributeError:
+        except AttributeError as error:
             con = self.steady_connection()
             if not con.threadsafety():
-                raise NotSupportedError("Database module is not thread-safe.")
+                raise NotSupportedError(
+                    "Database module is not thread-safe.") from error
             self.thread.connection = con
         con._ping_check()
         return con

dbutils/steady_db.py

@@ -277,10 +277,11 @@ def _create(self):
                                 con.OperationalError,
                                 con.InterfaceError,
                                 con.InternalError)
-                        except AttributeError:
+                        except AttributeError as error:
                             raise AttributeError(
                                 "Could not determine failure exceptions"
-                                " (please set failures or creator.dbapi).")
+                                " (please set failures or creator.dbapi)."
+                            ) from error
             if isinstance(self._failures, tuple):
                 self._failure = self._failures[0]
             else:
@@ -535,8 +536,8 @@ def __init__(self, con, *args, **kwargs):
         self._clearsizes()
         try:
             self._cursor = con._cursor(*args, **kwargs)
-        except AttributeError:
-            raise TypeError(f"{con!r} is not a SteadyDBConnection.")
+        except AttributeError as error:
+            raise TypeError(f"{con!r} is not a SteadyDBConnection.") from error
         self._closed = False
 
     def __enter__(self):

pyproject.toml

@@ -106,7 +106,6 @@ select = [
 ]
 # You can use `ruff rule ...` to see what these ignored rules check
 ignore = [
-  "B904",
   "E722",
   "N811",
   "N818",