Question

I’ve been working on getting a 2.5 module ported to 3.0, mostly for my own education, when I’ve gotten stuck. The class ‘Builder’ has as its init:

def __init__(self, **options):     self._verifyOptions(options)     self._options = options     self._initDigest()     self._initBuildNames()     self._methods = [] 

But the error occurs at:

def _initDigest(self):     import os, sys, hashlib     digester = hashlib.md5()     digester.update(self._options.get('code'))     self._digest = digester.hexdigest() 

which has as its traceback:

Traceback (most recent call last):   File '<pyshell#5>', line 5, in <module>     ''', language='Cee')   File 'C:\Python30\lib\site-packages\PyInline\__init__.py', line 31, in build     b = m.Builder(**args)   File 'C:\Python30\lib\site-packages\PyInline\Cee.py', line 17, in __init__     self._initDigest()   File 'C:\Python30\lib\site-packages\PyInline\Cee.py', line 27, in _initDigest     digester.update(self._options.get('code')) TypeError: object supporting the buffer API required 

I’ve run it through 2to3, but it isn’t picking up on it. As far as I can tell, the update function is expecting the argument to be in the form of bytes/buffer, but I’ve tried several different methods to convert it and haven’t succeeded.

As always, any assistance would be greatly appreciated. 🙂

Answer 1

I’m guessing that this line:

digester.update(self._options.get('code')) 

should become:

digester.update(self._options.get('code').encode('utf-8')) 

The actual desired encoding could be different in your case, but UTF-8 will work in all cases.