def adata():
    adata = ad.AnnData(np.zeros((100, 100)))
    adata.obsm["o"] = np.zeros((100, 50))
    adata.varm["o"] = np.zeros((100, 50))
    return adata
def open_link(self):
        "Open the selected item with the webbrowser"

        data = self.get_selected_item()
        url = data.get('permalink')
        if url:
            self.term.open_browser(url)
        else:
            self.term.flash()