Hello,
yesterday I upgraded from Python 2.3 to Python 2.6 and re-installed
Ply 2.5 for Python 2.6. I now get DeprecationWarning messages when
using ply (yacc), due to the use of the md5 module. Since Python 2.5,
the hashlib module is preferred (and the md5 module deprecated). I
created a patch that gets rid of the DeprecationWarning message, while
still allowing Ply 2.5 to run on older as well as newer Python
versions.
****** start of patch *********
--- yacc.py
+++ yacc.py
@@ -71,7 +71,18 @@
yaccdevel = 0 # Set to True if developing yacc.
This turns off optimized
# implementations of certain
functions.
-import re, types, sys, cStringIO, md5, os.path
+import re, types, sys, cStringIO, os.path
+
+# The hashlib module (new in Python 2.5) is preferred over the md5
module. The
+# (old) md5 module is deprecated since Python 2.5.
+try:
+ import hashlib
+ def new_md5():
+ return hashlib.md5()
+except:
+ import md5
+ def new_md5():
+ return md5.new()
# Exception raised for yacc-related errors
class YaccError(Exception): pass
@@ -1156,7 +1167,7 @@
Errorfunc = None # User defined error handler
- Signature = md5.new() # Digital signature of the grammar
rules, precedence
+ Signature = new_md5() # Digital signature of the grammar
rules, precedence
# and other information. Used to
determined when a
# parsing table needs to be
regenerated.
****** end of patch *********
Dennis
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