Fixing some errors.

swig/spt.i

@@ -49,3 +49,21 @@ namespace std {
 // Parse the header file to generate wrappers
 %include "../spt/camera.hpp"
 %include "../spt/interface.hpp"
+
+// Add additional Python code to the module
+%pythoncode %{
+def convert_cameras(cameras):
+    """Convert cameras from Python to C++."""
+    c_cameras = []
+    for cam in cameras:
+        camera = Camera()
+        camera.name = cam["name"]
+        camera.K = cam["K"]
+        camera.DC = cam["DC"]
+        camera.R = cam["R"]
+        camera.T = cam["T"]
+        camera.width = cam["width"]
+        camera.height = cam["height"]
+        c_cameras.append(camera)
+    return c_cameras
+%}