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 delete_comment(self):
        "Delete the selected comment"

        if self.get_selected_item()['type'] == 'Comment':
            self.delete_item()
        else:
            self.term.flash()