python实现从FTP下载数据

#！/usr/bin/python3
#-*-coding:utf-8-*-
"""
FTP常用操作
"""
from ftplib import FTP
import os

class FTP_OP(object):
    def __init__(self, host, username, password, port):
        """
        初始化ftp
        :param host: ftp主机ip
        :param username: ftp用户名
        :param password: ftp密码
        :param port:  ftp端口 （默认21）
        """
        self.host = host
        self.username = username
        self.password = password
        self.port = port
    def ftp_connect(self):
        """
        连接ftp
        :return:
        """
        ftp = FTP()
        ftp.set_debuglevel(0)  # 不开启调试模式
        ftp.connect(host=self.host, port=self.port)  # 连接ftp
        ftp.login(self.username, self.password)  # 登录ftp
        return ftp
    def download_file(self, ftp_file_path, dst_file_path):
        """
        从ftp下载文件到本地
        :param ftp_file_path: ftp下载文件路径
        :param dst_file_path: 本地存放路径
        :return:
        """
        buffer_size = 10240  #默认是8192
        ftp = self.ftp_connect()
        # print(ftp.getwelcome()) #显示登录ftp信息
        file_list = ftp.nlst(ftp_file_path)
        for file_name in file_list:
            ftp_file = os.path.join(ftp_file_path, file_name)
            write_file = os.path.join(dst_file_path, file_name)
            with open(write_file, "wb") as f:
                ftp.retrbinary('RETR {0}'.format(ftp_file), f.write, buffer_size)
            f.close()
        ftp.quit()

if __name__ == '__main__':
    host = "10.0.0.1"
    username = "test"
    password = "test"
    port = "21"
    ftp_file_path = "/data/ana"
    dst_file_path = "/data/tmp"
    ftp = FTP_OP(host=host, username=username, password=password, port=port)
    ftp.download_file(ftp_file_path=ftp_file_path, dst_file_path=dst_file_path