Get the number of used quadrangles in the model of blocks::
sum_u = doc.countUsedQuad()
+
+Get the quads used by the model of blocks
+
+.. literalinclude:: test_doc/quad/quad.py
+
Get a quadrangle of the document::
quad_f = doc.findQuad(vertex_1, vertex_2)
+More operations: *Quad* inherits :ref:`Element <tuielement>`.
+
GUI command: :ref:`guiquadrangles`