SE/relacion.py
def delete(self, expr):
        '''
        Delete, expr must be a valid Python expression; can contain field names.

        This operation will change the relation itself instead of generating a new one,
        deleting all the tuples where expr evaluates as True.

        Returns the number of affected rows.'''

        l = len(self.content)
        self._make_writable(copy_content=False)
        self.content = self.difference(self.selection(expr)).content
        return len(self.content) - l

        Delete, expr must be a valid Python expression; can contain field names.

        This operation will change the relation itself instead of generating a new one,
        deleting all the tuples where expr evaluates as True.

        Returns the number of affected rows.
Delete, expr must be a valid Python expression; can contain field names.
This operation will change the relation itself instead of generating a new one,
deleting all the tuples where expr evaluates as True.

Returns the number of affected rows.
Delete expr must be a valid Python expression ; can contain field names . This operation will change the relation itself instead of generating a new one deleting all the tuples where expr evaluates as True . Returns the number of affected rows .
def delete(self, expr):
        l = len(self.content)
        self._make_writable(copy_content=False)
        self.content = self.difference(self.selection(expr)).content
        return len(self.content) - l
def delete ( self , expr ) : l = len ( self . content ) self . _make_writable ( copy_content = False ) self . content = self . difference ( self . selection ( expr ) ) . content return len ( self . content ) - l
Delete, expr must be a valid Python expression; can contain field names.
Delete expr must be a valid Python expression ; can contain field names .
'''
        Delete, expr must be a valid Python expression; can contain field names.

        This operation will change the relation itself instead of generating a new one,
        deleting all the tuples where expr evaluates as True.

        Returns the number of affected rows.'''
self
expr