code: def connect(
      host='localhost',
      port=9000,
      database='default',
      user='default',
      password='',
      client_name='ibis',
      compression=_default_compression,
  ):
      
      client = ClickhouseClient(
          host,
          port=port,
          database=database,
          user=user,
          password=password,
          client_name=client_name,
          compression=compression,
      )
      if options.default_backend is None:
          options.default_backend = client
  
      return client
docs: Create an ClickhouseClient for use with Ibis.
  
      Parameters
      ----------
      host : str, optional
          Host name of the clickhouse server
      port : int, optional
          Clickhouse server's  port
      database : str, optional
          Default database when executing queries
      user : str, optional
          User to authenticate with
      password : str, optional
          Password to authenticate with
      client_name: str, optional
          This will appear in clickhouse server logs
      compression: str, optional
          Weather or not to use compression.
          Default is lz4 if installed else False.
          Possible choices: lz4, lz4hc, quicklz, zstd, True, False
          True is equivalent to 'lz4'.
  
      Examples
      --------
      >>> import ibis
      >>> import os
      >>> clickhouse_host = os.environ.get('IBIS_TEST_CLICKHOUSE_HOST',
      ...                                  'localhost')
      >>> clickhouse_port = int(os.environ.get('IBIS_TEST_CLICKHOUSE_PORT',
      ...                                      9000))
      >>> client = ibis.clickhouse.connect(
      ...     host=clickhouse_host,
      ...     port=clickhouse_port
      ... )
      >>> client  # doctest: +ELLIPSIS
      <ibis.clickhouse.client.ClickhouseClient object at 0x...>
  
      Returns
      -------
      ClickhouseClient