Fixed up the introspection code and tests added for #9779 to run under Python 2.3, which has neither set nor rsplit.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10392 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/sqlite3/introspection.py

@@ -67,8 +67,7 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
         # Schema for this table
         cursor.execute("SELECT sql FROM sqlite_master WHERE tbl_name = %s", [table_name])
         results = cursor.fetchone()[0].strip()
-        results = results.split('(', 1)[1] 
-        results = results.rsplit(')', 1)[0] 
+        results = results[results.index('(')+1:results.rindex(')')]
 
         # Walk through and look for references to other tables. SQLite doesn't
         # really have enforced references, but since it echoes out the SQL used
@@ -89,8 +88,9 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
             if not result:
                 continue
             other_table_results = result[0].strip()
-            other_table_results = other_table_results.split('(', 1)[1] 
-            other_table_results = other_table_results.rsplit(')', 1)[0] 
+            li, ri = other_table_results.index('('), other_table_results.rindex(')')
+            other_table_results = other_table_results[li+1:ri]
+
 
             for other_index, other_desc in enumerate(other_table_results.split(',')):
                 other_desc = other_desc.strip()

tests/regressiontests/introspection/tests.py

@@ -5,6 +5,11 @@ from django.utils import functional
 
 from models import Reporter, Article
 
+try:
+    set
+except NameError:
+    from sets import Set as set     # Python 2.3 fallback
+
 #
 # The introspection module is optional, so methods tested here might raise
 # NotImplementedError. This is perfectly acceptable behavior for the backend