def del_tag(<EOL>self,<EOL>tag):
if tag.replace("<STR_LIT:@>", "<STR_LIT>") not in self.tags:<EOL><INDENT>return<EOL><DEDENT>self.refresh<EOL>oldContent = self.to_string(indentLevel=<NUM_LIT:1>)<EOL>newTags = []<EOL>newTags[:] = [n for n in newTags if tag not in n]<EOL>self.tags = newTags<EOL>newContent = self.to_string(indentLevel=<NUM_LIT:1>)<EOL>self.parent._update_document_tree(<EOL>oldContent=oldContent,<EOL>newContent=newContent<EOL>)<EOL>self.refresh<EOL>return None<EOL>
*delete a tag this taskpaper object*

        **Key Arguments:**
            - ``tag`` -- the tag to delete to the object

        **Usage:**

            .. code-block:: python 

                aTask.del_tag("@due")