+
−"""
+
−The md5 and sha modules are deprecated since Python 2.5, replaced by the
+
−hashlib module containing both hash algorithms. Here, we provide a common
+
−interface to the md5 and sha constructors, preferring the hashlib module when
+
−available.
+
−"""
+
−
+
−try:
+
−    import hashlib
+
−    md5_constructor = hashlib.md5
+
−    sha_constructor = hashlib.sha1
+
−except ImportError:
+
−    import md5
+
−    md5_constructor = md5.new
+
−    import sha
+
−    sha_constructor = sha.new