import os
from ftplib import FTP  # 引入ftp模块


class MyFtp:
    ftp = FTP()

    def __init__(self, host, port=21):
        self.ftp.connect(host, port)

    def login(self, username, pwd):
        self.ftp.set_debuglevel(2)  # 打开调试级别2，显示详细信息
        self.ftp.login(username, pwd)
        print(self.ftp.welcome)

    def downloadFile(self, localpath, remotepath, filename):
        os.chdir(localpath)  # 切换工作路径到下载目录
        self.ftp.cwd(remotepath)  # 要登录的ftp目录
        self.ftp.nlst()  # 获取目录下的文件
        file_handle = open(filename, "wb").write  # 以写模式在本地打开文件
        self.ftp.retrbinary("RETR %s" % os.path.basename(filename), file_handle, blocksize=1024)  # 下载ftp文件

    def close(self):
        self.ftp.set_debuglevel(0)  # 关闭调试
        self.ftp.quit()


if __name__ == "__main__":
    ftp = MyFtp("210.68.128.195")
    ftp.login("topcogGF", "gF2#3621614!%#")
    ftp.downloadFile("./", "/reference_GF/", "PDK 40LP V1.5_5.0c - 40LP Baseline-RF-mmWave PDK.zip")
    ftp.close()