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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def create_from_mesh_and_lines(cls, mesh, lines):
        '''
        Return a copy of mesh with line vertices and edges added.

        mesh: A Mesh
        lines: A list of Polyline or Lines objects.

        '''
        mesh_with_lines = mesh.copy()
        mesh_with_lines.add_lines(lines)
        return mesh_with_lines