Method push

lib/matplotlib/backends/backend_pdf.py:2495–2500

(self)

            return [*rgb[:3], Op.setrgb_nonstroke]

    def push(self):
        parent = GraphicsContextPdf(self.file)
        parent.copy_properties(self)
        parent.parent = self.parent
        self.parent = parent
        return [Op.gsave]

    def pop(self):
        assert self.parent is not None