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dd� ZdS )r r c C s t �d S r! r� �r1 r� r@ r r r" r� � s zMutableSequence.__setitem__c C s t �d S r! r� r� r r r" r� � s zMutableSequence.__delitem__c C s t �dS )z3S.insert(index, value) -- insert value before indexNr� r� r r r" �insert� s zMutableSequence.insertc C s | � t| �|� dS )z:S.append(value) -- append value to the end of the sequenceN)r� rb r? r r r" �append� s zMutableSequence.appendc C s( z| � � qW n tk
r" Y nX dS )z,S.clear() -> None -- remove all items from SN)r� r� r0 r r r" r� � s zMutableSequence.clearc C sH t | �}t|d �D ].}| || d | | | |< | || d < qdS )z!S.reverse() -- reverse *IN PLACE*r~ r N)rb r� )r1 r� r� r r r" �reverse� s zMutableSequence.reversec C s( || krt |�}|D ]}| �|� qdS )zMS.extend(iterable) -- extend sequence by appending elements from the iterableN)�listr� )r1 r� r� r r r" �extend� s zMutableSequence.extendr� c C s | | }| |= |S )z�S.pop([index]) -> item -- remove and return item at index (default last).
Raise IndexError if list is empty or index is out of range.
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