X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/blobdiff_plain/8fe086b5ae03df5fadf1ec7de1aa41c0ace4a3ae..eb2eadbbeeaf00d7e2af18e6c8ee47602f96e528:/pypol/domains.py

diff --git a/pypol/domains.py b/pypol/domains.py
index bbb0946..12cf471 100644
--- a/pypol/domains.py
+++ b/pypol/domains.py
@@ -155,24 +155,25 @@ class Domain:
     def drop_dims(self, dims):
         # use to remove certain variables use isl_set_drop_constraints_involving_dims instead?
         from .polyhedra import Polyhedron 
-        n = 1     
-        dims = list(dims)
-        symbols = list(self.symbols)
+        n = 0 
+        dims = sorted(dims)
+        symbols = sorted(self.symbols)
         islset = self._toislset(self.polyhedra, self.symbols)
         for dim in dims:
             dim_index = dims.index(dim)
             if dim in symbols:
                 first = symbols.index(dim) 
                 try:
-                    if symbols[first+1] is dims[dim_index+1]: #check if next value in symbols is same as next value in dims
-                        n += 1
-                        islbset = libisl.isl_set_project_out(islset, libisl.isl_dim_set, first, n)  
-                        symbols.__delitem__(first)
+                    for dim in dims:
+                        if symbols[first+1] is dims[dim_index+1]: #check if next value in symbols is same as next value in dims
+                            n += 1
+                        islbset = libisl.isl_set_project_out(islset, libisl.isl_dim_set, first, n) 
+                        symbols.remove(dim)
                 except:
-                    islbset = libisl.isl_set_project_out(islset, libisl.isl_dim_set, first, n)  
-                symbols.__delitem__(first)     
+                    islbset = libisl.isl_set_project_out(islset, libisl.isl_dim_set, first, 1) 
+                    symbols.remove(dim) 
             else:
-                islbset = libisl.isl_set_project_out(islset, libisl.isl_dim_set, 0, 0)        
+                islbset = libisl.isl_set_project_out(islset, libisl.isl_dim_set, 0, 0)     
         return Polyhedron._fromislset(islbset, symbols)
     
     def sample(self):