text: # -*- coding: utf-8 -*-
  import logging
  
  #
  # Copyright (c) 2019 Ryan Murray.
  #
  # This file is part of Dremio Client
  # (see https://github.com/rymurr/dremio_client).
  #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  #
  # http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing,
  # software distributed under the License is distributed on an
  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  #
  import sys
  
  
  _WINDOWS_DRIVER = "Dremio Connector"
  _OSX_DRIVER = "Dremio Connector"
  _LINUX32_DRIVER = "Dremio ODBC Driver 32-bit"
  _LINUX64_DRIVER = "Dremio ODBC Driver 64-bit"
  _DRIVER = None
  
  
  def _get_driver_name():
      global _DRIVER
      if "linux" in sys.platform:
          if sys.maxsize > 2 ** 32:
              _DRIVER = _LINUX64_DRIVER
          else:
              _DRIVER = _LINUX32_DRIVER
      if "darwin" in sys.platform:
          _DRIVER = _OSX_DRIVER
      if "win" in sys.platform:
          _DRIVER = _WINDOWS_DRIVER
      logging.debug("Using %s as the odbc driver", _DRIVER)
  
  
  try:
      import pyodbc
      import pandas
  
      def connect(hostname="localhost", port=31010, username="dremio", password="dremio123"):
          """
          Connect to and authenticate against Dremio's odbc server. Auth is skipped if username is None
  
          :param hostname: Dremio coordinator hostname
          :param port: Dremio coordinator port
          :param username: Username on Dremio
          :param password: Password on Dremio
          :return: arrow flight client
          """
          _get_driver_name()
          c = pyodbc.connect(
              "Driver={};ConnectionType=Direct;HOST={};PORT={};AuthenticationType=Plain;UID={};PWD={}".format(
                  _DRIVER, hostname, port, username, "{" + password + "}"
              ),
              autocommit=True,
          )
  
          return c
  
      def query(sql, client=None, hostname="localhost", port=31010, username="dremio", password="dremio123"):
          """
          Run an sql query against Dremio and return a pandas dataframe
  
          Either host,port,user,pass tuple or a pre-connected client should be supplied. Not both
  
          :param sql: sql query to execute on dremio
          :param client: pre-connected client (optional)
          :param hostname: Dremio coordinator hostname (optional)
          :param port: Dremio coordinator port (optional)
          :param username: Username on Dremio (optional)
          :param password: Password on Dremio (optional)
          :return:
          """
          if not client:
              client = connect(hostname, port, username, password)
          return pandas.read_sql(sql, client)
  
  
  except ImportError:
  
      def connect(*args, **kwargs):
          raise NotImplementedError("Python Flight bindings require Python 3 and pyarrow > 0.14.0")
  
      def query(*args, **kwargs):
          raise NotImplementedError("Python Flight bindings require Python 3 and pyarrow > 0.14.0")
  