Specify the ‘Exception’ catch-all exception class, not a bare ‘except’.

PEP 8 specifies:

* When catching exceptions, mention specific exceptions whenever possible
  instead of using a bare `except:` clause […]

  A bare `except:` clause will catch `SystemExit` and `KeyboardInterrupt`
  exceptions, making it harder to interrupt a program with Control-C, and
  can disguise other problems. If you want to catch all exceptions that
  signal program errors, use `except Exception:` (bare except is equivalent
  to `except BaseException:`).

auth-mastodon.py

@@ -61,7 +61,7 @@ try:
     )
     database.set_session(readonly=True, autocommit=True)
     logging.debug(database.get_dsn_parameters())
-except:
+except Exception:
     logging.error("Unable to initialize database, check settings!")
     time.sleep(10)
     sys.exit(1)