1 files changed, 37 insertions, 0 deletions
diff --git a/weave/examples/increment_example.py b/weave/examples/increment_example.py
new file mode 100644
index 000000000..ded586283
--- /dev/null
+++ b/weave/examples/increment_example.py
@@ -0,0 +1,37 @@
+# examples/increment_example.py
+
+#from compiler import ext_tools
+
+# use the following so that development version is used.
+import sys
+sys.path.insert(0,'..')
+import ext_tools
+
+def build_increment_ext():
+    """ Build a simple extension with functions that increment numbers.
+        The extension will be built in the local directory.
+    """        
+    mod = ext_tools.ext_module('increment_ext')
+
+    a = 1 # effectively a type declaration for 'a' in the 
+          # following functions.
+
+    ext_code = "return_val = Py::new_reference_to(Py::Int(a+1));"    
+    func = ext_tools.ext_function('increment',ext_code,['a'])
+    mod.add_function(func)
+    
+    ext_code = "return_val = Py::new_reference_to(Py::Int(a+2));"    
+    func = ext_tools.ext_function('increment_by_2',ext_code,['a'])
+    mod.add_function(func)
+            
+    mod.compile()
+
+if __name__ == "__main__":
+    try:
+        import increment_ext
+    except ImportError:
+        build_increment_ext()
+        import increment_ext
+    a = 1
+    print 'a, a+1:', a, increment_ext.increment(a)
+    print 'a, a+2:', a, increment_ext.increment_by_2(a)