py26-xml: ImportError: No module named _md5

[akimd (Akim Demaille)]

Hi,

This error was already reported in other contexts for Python 2.5, and people were told to install py25-hashlib. But there is no such thing for py26.

akim@montero ~/src/kernel $ python2.6                                                                                      2 14:10:08
Python 2.6.1 (r261:67515, Apr  2 2009, 14:20:17) 
[GCC 4.0.1 (Apple Inc. build 5490)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from xml.sax import saxexts, saxlib, saxutils
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/_xmlplus/sax/saxutils.py", line 8, in <module>
    import os, urlparse, urllib2, types
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 91, in <module>
    import hashlib
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/hashlib.py", line 136, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/hashlib.py", line 63, in __get_builtin_constructor
    import _md5
ImportError: No module named _md5
>>> 

[blb@…]

Your example import works fine for me:

Python 2.6.2 (r262:71600, Apr 24 2009, 17:25:56) 
[GCC 4.0.1 (Apple Inc. build 5490)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from xml.sax import saxexts, saxlib, saxutils
>>>

This is with the following python26 and py26-xml installed:

  py26-xml @0.8.4_0 (active)
  python26 @2.6.2_1 (active)

Note that there is no py26-hashlib as its functionality should be built into python26. Does the following file exist on your install?

/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload/_hashlib.so

[akimd (Akim Demaille)]

Replying to blb@…:

Note that there is no py26-hashlib as its functionality should be built into python26. Does the following file exist on your install?

/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload/_hashlib.so

Yes, it does:

$ ls -l /opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload/_hashlib.so
-rwxr-xr-x  2 root  admin  21748 Apr  2 14:20 /opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload/_hashlib.so

But there is no _md5.so, shouldn't there be one?

I have the same ports as you:

$ port echo active | grep py
py26-docutils                  @0.5_1 
py26-libxml2                   @2.6.21_0 
py26-xml                       @0.8.4_0 
python26                       @2.6.1_2 
python_select                  @0.2.1_0+darwin_9 
swig                           @1.3.38_0+perl+php5+python+ruby 
xorg-libxcb                    @1.2_0+python26 
xorg-xcb-proto                 @1.4_0+python26 

and still the error.

$ python2.6
Python 2.6.1 (r261:67515, Apr  2 2009, 14:20:17) 
[GCC 4.0.1 (Apple Inc. build 5490)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from xml.sax import saxexts, saxlib, saxutils
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/_xmlplus/sax/saxutils.py", line 8, in <module>
    import os, urlparse, urllib2, types
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 91, in <module>
    import hashlib
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/hashlib.py", line 136, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/hashlib.py", line 63, in __get_builtin_constructor
    import _md5
ImportError: No module named _md5

I don't know what to look for. I am no Python programmer, I don't know how to ask it its path.

[akimd (Akim Demaille)]

All this boils down to this, I guess:

$ python2.6
[GCC 4.0.1 (Apple Inc. build 5490)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import md5
__main__:1: DeprecationWarning: the md5 module is deprecated; use hashlib instead
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/md5.py", line 10, in <module>
    from hashlib import md5
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/hashlib.py", line 136, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/hashlib.py", line 63, in __get_builtin_constructor
    import _md5
ImportError: No module named _md5

[blb@…]

Hmm, perhaps the build didn't properly link to OpenSSL; what is the result of running the following two commands?

$ python2.6 -c 'import _hashlib;print dir(_hashlib)'
$ port installed openssl

[akimd (Akim Demaille)]

Replying to blb@…:

Hmm, perhaps the build didn't properly link to OpenSSL; what is the result of running the following two commands?

$ python2.6 -c 'import _hashlib;print dir(_hashlib)'
$ port installed openssl

$ python2.6 -c 'import _hashlib;print dir(_hashlib)'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload/_hashlib.so, 2): Library not loaded: /opt/local/lib/libssl.1.0.0.dylib
  Referenced from: /opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload/_hashlib.so
  Reason: image not found
$ port installed openssl
The following ports are currently installed:
  openssl @0.9.8k_0 (active)
$ ls /opt/local/lib/libssl.*
/opt/local/lib/libssl.0.9.8.dylib	/opt/local/lib/libssl.a			/opt/local/lib/libssl.dylib

So I reinstalled python26 and now this works properly. My problems with ssl.1.0.0 were reported in another ticket (​http://trac.macports.org/ticket/19124).

Now:

>>> import md5;
__main__:1: DeprecationWarning: the md5 module is deprecated; use hashlib instead

It does work now. So I basically had you debug my machine :( Sorry about that.