simplify some import statements and clean up a docstring and BerkeleyDB library

version check to mention that we support versions 3.2 - 4.2.

Lib/bsddb/__init__.py

@@ -33,7 +33,7 @@
 #----------------------------------------------------------------------
 
 
-"""Support for BerkeleyDB 3.1 through 4.1.
+"""Support for BerkeleyDB 3.2 through 4.2.
 """
 
 try:

Lib/bsddb/db.py

@@ -40,5 +40,5 @@
 from _bsddb import *
 from _bsddb import __version__
 
-if version() < (3, 1, 0):
-    raise ImportError, "BerkeleyDB 3.x symbols not found.  Perhaps python was statically linked with an older version?"
+if version() < (3, 2, 0):
+    raise ImportError, "correct BerkeleyDB symbols not found.  Perhaps python was statically linked with an older version?"

Lib/bsddb/dbshelve.py

@@ -35,12 +35,7 @@ try:
 except ImportError:
     # DictMixin is new in Python 2.3
     class DictMixin: pass
-try:
-    # For Python 2.3
-    from bsddb import db
-except ImportError:
-    # For earlier Pythons w/distutils pybsddb
-    from bsddb3 import db
+import db
 
 #------------------------------------------------------------------------
 

Lib/bsddb/dbutils.py

@@ -26,12 +26,7 @@
 #
 from time import sleep as _sleep
 
-try:
-    # For Python 2.3
-    from bsddb import db
-except ImportError:
-    # For earlier Pythons w/distutils pybsddb
-    from bsddb3 import db
+import db
 
 # always sleep at least N seconds between retrys
 _deadlock_MinSleepTime = 1.0/64