code: def main(host='localhost', port=8086):
      
      user = 'root'
      password = 'root'
      dbname = 'example'
      dbuser = 'smly'
      dbuser_password = 'my_secret_password'
      query = 'select Float_value from cpu_load_short;'
      query_where = 'select Int_value from cpu_load_short where host=$host;'
      bind_params = {'host': 'server01'}
      json_body = [
          {
              "measurement": "cpu_load_short",
              "tags": {
                  "host": "server01",
                  "region": "us-west"
              },
              "time": "2009-11-10T23:00:00Z",
              "fields": {
                  "Float_value": 0.64,
                  "Int_value": 3,
                  "String_value": "Text",
                  "Bool_value": True
              }
          }
      ]
  
      client = InfluxDBClient(host, port, user, password, dbname)
  
      print("Create database: " + dbname)
      client.create_database(dbname)
  
      print("Create a retention policy")
      client.create_retention_policy('awesome_policy', '3d', 3, default=True)
  
      print("Switch user: " + dbuser)
      client.switch_user(dbuser, dbuser_password)
  
      print("Write points: {0}".format(json_body))
      client.write_points(json_body)
  
      print("Querying data: " + query)
      result = client.query(query)
  
      print("Result: {0}".format(result))
  
      print("Querying data: " + query_where)
      result = client.query(query_where, bind_params=bind_params)
  
      print("Result: {0}".format(result))
  
      print("Switch user: " + user)
      client.switch_user(user, password)
  
      print("Drop database: " + dbname)
      client.drop_database(dbname)
docs: Instantiate a connection to the InfluxDB.