code: def __init__(self):
      timeout = 10.0
      self._dbhost = args.dbhost if args.dbhost else "localhost"
      self._dbport = args.dbport if args.dbport else 8086
      self._username = args.username if args.username else None
      self._password = args.password if args.password else None
      self._database = args.database if args.database else "instruments"
      self._ticker = args.ticker
  
      self._iqhost = args.iqhost if args.iqhost else "localhost"
      self._iqport = args.iqport if args.iqport else 9100
      self._ticker = args.ticker
      self._year = None
      self._recv_buf = ""
      self._ndf = pd.DataFrame()
  
      # Open a streaming socket to the IQFeed daemon
      self._sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      self._sock.connect((self._iqhost, self._iqport))
      self._sock.settimeout(timeout)
  
      self.dfdb = dfclient(
          self._dbhost,
          self._dbport,
          self._username,
          self._password,
          self._database,
      )
  
      if not args.fromdate:
          self._start = str(dt.datetime.today().year)
      elif len(args.fromdate) == 4 or len(args.fromdate == 10):
          self._start = args.fromdate
      else:
          log.error(
              "Starting date required in YYYY-MM-DD or YYYY format."
          )
          sys.exit(-1)
  
      if not args.todate:
          self._stop = str(dt.datetime.today().year)
      elif len(args.fromdate) == 4 or len(args.fromdate == 10):
          self._stop = args.todate
      else:
          log.error(
              "Starting date required in YYYY-MM-DD or YYYY format."
          )
          sys.exit(-1)
  
file_path: backtrader/contrib/utils/iqfeed-to-influxdb.py
imports: import sys
  import os
  import io
  import socket
  import logging
  import numpy
  import pandas
  import datetime
  import argparse
  from influxdb import DataFrameClient
  from influxdb.exceptions import InfluxDBClientError
label_desc: Use image node_id 1 to create a new IQFeedTool object from inherited base classes: object with example: obj = IQFeedTool()