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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 setup_toolbar(self):
 """Setup the toolbar"""

        savefig_btn = create_toolbutton(
                self, icon=ima.icon('filesave'),
                tip=_("Save Image As..."),
                triggered=self.save_figure)

        saveall_btn = create_toolbutton(
                self, icon=ima.icon('save_all'),
                tip=_("Save All Images..."),
                triggered=self.save_all_figures)

        copyfig_btn = create_toolbutton(
            self, icon=ima.icon('editcopy'),
            tip=_("Copy plot to clipboard as image (%s)" %
                  get_shortcut('plots', 'copy')),
            triggered=self.copy_figure)

        closefig_btn = create_toolbutton(
                self, icon=ima.icon('editclear'),
                tip=_("Remove image"),
                triggered=self.close_figure)

        closeall_btn = create_toolbutton(
                self, icon=ima.icon('filecloseall'),
                tip=_("Remove all images from the explorer"),
                triggered=self.close_all_figures)

        vsep1 = QFrame()
        vsep1.setFrameStyle(53)

        goback_btn = create_toolbutton(
                self, icon=ima.icon('ArrowBack'),
                tip=_("Previous Figure ({})".format(
                      get_shortcut('plots', 'previous figure'))),
                triggered=self.go_previous_thumbnail)

        gonext_btn = create_toolbutton(
                self, icon=ima.icon('ArrowForward'),
                tip=_("Next Figure ({})".format(
                      get_shortcut('plots', 'next figure'))),
                triggered=self.go_next_thumbnail)

        vsep2 = QFrame()
        vsep2.setFrameStyle(53)

        zoom_out_btn = create_toolbutton(
                self, icon=ima.icon('zoom_out'),
                tip=_("Zoom out (Ctrl + mouse-wheel-down)"),
                triggered=self.zoom_out)

        zoom_in_btn = create_toolbutton(
                self, icon=ima.icon('zoom_in'),
                tip=_("Zoom in (Ctrl + mouse-wheel-up)"),
                triggered=self.zoom_in)

        self.zoom_disp = QSpinBox()
        self.zoom_disp.setAlignment(Qt.AlignCenter)
        self.zoom_disp.setButtonSymbols(QSpinBox.NoButtons)
        self.zoom_disp.setReadOnly(True)
        self.zoom_disp.setSuffix(' %')
        self.zoom_disp.setRange(0, 9999)
        self.zoom_disp.setValue(100)
        self.figviewer.sig_zoom_changed.connect(self.zoom_disp.setValue)

        zoom_pan = QWidget()
        layout = QHBoxLayout(zoom_pan)
        layout.setSpacing(0)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.addWidget(zoom_out_btn)
        layout.addWidget(zoom_in_btn)
        layout.addWidget(self.zoom_disp)

        return [savefig_btn, saveall_btn, copyfig_btn, closefig_btn,
                closeall_btn, vsep1, goback_btn, gonext_btn, vsep2, zoom_pan]