[Pyrex] cimport across directories

[Martin Albrecht]

Hi everyone,

my name is Martin Albrecht and I use Pyrex in the SAGE [1] project by William 
Stein.

I believe to have found and fixed a bug in Pyrex which prevented cimporting 
modules across directory borders. This issue has been discussed on this list 
a while back [2]: The problem seems to boil down to: either Pyrex cannot find 
the pxd file or python cannot find the module at run time. Consider e.g. you 
have some module in the directory bar called foo. You can (a) either cimport 
foo and add bar to the pyrexc include path or (b) you can cimport bar.foo and 
add the top level directory to the include path. In case (a) pyrexc finds the 
file but python gets confused with a module foo. In case (b) pyrexc 
complaints not to find the file foo.bar.pxd. 

I fixed the later one which was due to the fact that the dots where not 
replaced by directory delimiters so search_include_directories() can handle 
the filename.

--- home/martin/pyrex-0.9.4.1/Pyrex/Compiler/Main.py	2006-04-15 
09:24:02.000000000 +0200
+++ opt/sage/local/lib/python2.4/site-packages/Pyrex/Compiler/Main.py	
2006-06-15 21:25:20.000000000 +0200
@@ -91,7 +91,10 @@
     def find_pxd_file(self, module_name, pos):
         # Search include directories for the .pxd file
         # corresponding to the given (full) module name.
-        pxd_filename = "%s.pxd" % module_name
+        if "." in module_name:
+            pxd_filename = "%s.pxd" % module_name.replace(".","/")
+        else:
+            pxd_filename = "%s.pxd" % module_name
         return self.search_include_directories(pxd_filename, pos)
     
     def find_include_file(self, filename, pos):

Regards,
Martin Albrecht

[1] http://modular.math.washington.edu/sage/
[2] http://lists.copyleft.no/pipermail/pyrex/2005-March/001141.html

-- 
name: Martin Albrecht
_pgp: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x8EF0DC99
_www: http://www.informatik.uni-bremen.de/~malb
_icq: 177334829
_jab: martinralbrecht at jabber.ccc.de