python remote connection

#! /usr/bin/env python3
# coding:utf-8

import paramiko
import re
from os import path
import time
import logging
import logging.handlers

# hostname = '132.33.35.23'
# username = 'ftstp'
# password = 'testZz$nN01h'
# port = 22
# local_dir = '/tmp/local_dir'
# remote_dir = '/tmp/remote_dir'
# log_file_path = '.'
# log_file_name = 'file_get_put.log'


hostname = '192.168.40.11'
username = 'root'
password = '1qaz! QAZ'
port = 22
local_dir = '/root/cly_test/test_file_get_put'
remote_dir = '/root/clytest/test_file_get_put'
log_file_path = '.'
log_file_name = 'file_get_put.log'


def init_logger(log_file_path,log_file_name):
    FORMAT_STR = '[%(asctime)s][%(thread)d][%(filename)s][line: %(lineno)d][%(levelname)s] ## %(message)s'
    log_format = logging.Formatter(FORMAT_STR)
    file_handle = logging.handlers.RotatingFileHandler(
        filename=path.join(log_file_path, log_file_name),
        maxBytes=1024 * 1024,
        backupCount=10)
    file_handle.setFormatter(log_format)
    logger = logging.getLogger('log')
    logger.addHandler(file_handle)
    logger.setLevel(logging.DEBUG)
    logger.info('init logger success')

try:
    init_logger(log_file_path,log_file_name)
    logger = logging.getLogger('log')
    t = paramiko.Transport((hostname, port))
    logger.info('connect obj {}'.format(t))
    t.connect(username=username, password=password)
    sftp = paramiko.SFTPClient.from_transport(t)
    files = sftp.listdir(remote_dir)
    now = time.strftime('%Y%m%d', time.localtime())
    'Match rule, match by current date'
    pattern = re.compile(r'^{}.*?REQ$'.format(now))
    logger.info('pattern{}'.format(pattern))

    # If there are multiple nested directories, it can be processed
    for f in files:

        if re.match(pattern, f):
            logger.info('match file {}'.format(f))
            sftp.get(path.join(remote_dir, f), path.join(local_dir, f))
    t.close()
except Exception as err:
    logging.error(err)