ftptest.py

from ftplib import FTP
import os.path

class FtpWalk:
    def __init__(self, ftp, *path):
        self._ftp = ftp
        for c in path:
            self._ftp.cwd(c)
        self._path = self._ftp.pwd()

    def listdir(self, _path):
        file_list, dirs, nondirs = [], [], []
        old_directory = self._ftp.pwd()
        self._ftp.cwd(_path)
        self._ftp.retrlines('LIST', lambda x: file_list.append(x.split()))
        for info in file_list:
            ls_type, name = info[0], info[-1]
            if ls_type.startswith('d'):
                if name != '..' and name != '.':
                    dirs.append(name)
            else:
                nondirs.append(name)
        self._ftp.cwd(old_directory)
        return dirs, nondirs

    def cwd(self):
        return self._path

    def walk(self, path=None):
        if not path:
            path = self._path
        dirs, nondirs = self.listdir(path)
        yield path, dirs, nondirs
        for name in dirs:
            # using cwd is the only cross platform solution I have found so far
            self._ftp.cwd(path)
            self._ftp.cwd(name)
            path = self._ftp.pwd()
            yield from self.walk(path)
            path = os.path.dirname(path)

def ftp_walk(ftp, *path):
    walk = FtpWalk(ftp, *path)
    tree = list(walk.walk())
    def relpath(w): return (os.path.relpath(w[0], walk.cwd()), w[1], w[2])
    res = map(relpath, tree)
    return res

ftp = FTP()

freebox = True

if (freebox):
    ftp.connect("mafreebox.freebox.fr")
    ftp.login()

else:
    ftp.connect('localhost', 12344)
    ftp.login('user')

for x in ftp_walk(ftp, 'Disque dur','autres', 'OpenHardwareMonitor'):
    print(x)

print(ftp.pwd())