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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def delete(self, name):
    '''
    Delete all the data in a named timeseries.
    '''
    keys = self._client.keys('%s%s:*'%(self._prefix,name))

    pipe = self._client.pipeline(transaction=False)
    for key in keys:
      pipe.delete( key )
    pipe.execute()

    # Could be not technically the exact number of keys deleted, but is a close
    # enough approximation
    return len(keys)