docs: def drop_column(self, table, name):
          """Remove a column to an existing table."""
          try:
              self.execute('ALTER TABLE {0} DROP COLUMN {1}'.format(wrap(table), name))
              self._printer('\tDropped column {0} from {1}'.format(name, table))
          except ProgrammingError:
              self._printer("\tCan't DROP '{0}'; check that column/key exists in '{1}'".format(name, table))
          return name