md5 module not found

savecancel

Hi there. When I try to start up SAGE by typing './sage', I get the following response:

| Sage Version 4.8, Release Date: 2012-01-20 |

| Type notebook() for the GUI, and license() for information. |

Traceback (most recent call last): File "/home/liam/SAGE/local/bin/sage-ipython", line 18, in <module> import IPython File "/home/liam/SAGE/local/lib/python2.6/site-packages/IPython/__init__.py", line 58, in <module> __import__(name,glob,loc,[]) File "/home/liam/SAGE/local/lib/python2.6/site-packages/IPython/ipstruct.py", line 17, in <module> from IPython.genutils import list2dict2 File "/home/liam/SAGE/local/lib/python2.6/site-packages/IPython/genutils.py", line 53, in <module> from IPython.external.path import path File "/home/liam/SAGE/local/lib/python2.6/site-packages/IPython/external/path.py", line 35, in <module> import md5 File "/home/liam/SAGE/local/lib/python/md5.py", line 10, in <module> from hashlib import md5 File "/home/liam/SAGE/local/lib/python/hashlib.py", line 136, in <module> md5 = __get_builtin_constructor('md5') File "/home/liam/SAGE/local/lib/python/hashlib.py", line 63, in __get_builtin_constructor import _md5 ImportError: No module named _md5

So I think I don't have some package installed. However I'm not sure which to install, and it might not even be that that is the problem! Can you help me please?