Why do I get “abort: could not import module mpatch!” when invoking hg?
If your current directory is that of the Mercurial source distribution, it is possible that hg is looking in the local mercurial package directory and fails to find the mpatch.so extension module. The solution (for most situations) is to move out of the source distribution directory and to try again. This is a common Python pitfall: Python will often be confused by packages or modules in the current directory and will import packages/modules from these local locations instead of looking in the appropriate places. If you are trying to use hg on a checkout of the Mercurial software itself, you might want to check any PYTHONPATH environment variable that you may have set and remove “empty” paths.
