defince methods using cpdef

other minor changes style

src/cdt.pxi

@@ -3,33 +3,36 @@ cdef class CDT:
     cdef c_CDT *me
     cdef point_vec polyline
 
-    def __init__(self, list polyline):
+    def __cinit__(self, list polyline=None):
         self.polyline = pointvec_factory(0)
-        for point in polyline:
-            self.polyline.push_back(new_Point(point.x, point.y))
+        if polyline:       
+            for point in polyline:
+                self.polyline.push_back(new_Point(point.x, point.y))
         self.me = new_CDT(self.polyline)
 
-    def triangulate(self):
+
+    cpdef triangulate(self):
         cdef Point a,b,c
+        cdef list triangles = []
         self.me.Triangulate()
         cdef triangle_vec tri_list = self.me.GetTriangles()
-        cdef list tris = []
-        for i in range(tri_list.size()):
+        cdef int num_triangles = tri_list.size()
+        for i in range(num_triangles):
             a = Point(tri_list.get(i).GetPoint(0).x, tri_list.get(i).GetPoint(0).y)
             b = Point(tri_list.get(i).GetPoint(1).x, tri_list.get(i).GetPoint(1).y)
             c = Point(tri_list.get(i).GetPoint(2).x, tri_list.get(i).GetPoint(2).y)
-            tris.append(Triangle(a, b, c))
-        return tris
+            triangles.append(Triangle(a, b, c))
+        return triangles
 
-    def add_hole(self, polyline):
+    cpdef add_hole(self, polyline):
         cdef point_vec hole = pointvec_factory(0)
         for point in polyline:
             hole.push_back(new_Point(point.x, point.y))
         self.me.AddHole(hole)
 
-    def add_point(self, point):
+    cpdef add_point(self, point):
         cdef c_Point* p = new_Point(point.x, point.y)
         self.me.AddPoint(p)
 
     def __dealloc__(self):
-        del_CDT(self.me)
+        del_CDT(self.me)

src/shapes.pxi

@@ -14,8 +14,8 @@ cdef class Point:
         def __get__(self): return self.y
         def __set__(self, y): self.y = y
 
-    def debug_print(self):
-        print "(" + str(self.x) + ", " + str(self.y) + ")",
+    def __str__(self):
+        return "Point({self.x}, {self.y})".format(self=self)
 
 cdef class Triangle:
 
@@ -35,9 +35,6 @@ cdef class Triangle:
     property c:
         def __get__(self): return self.c
 
-    def debug_print(self):
-        self.a.debug_print()
-        self.b.debug_print()
-        self.c.debug_print()
-        print
-
+    def __str__(self):
+        return "Triangle({self.a}, {self.b}, {self.c})".format(self=self)
+