Extending Python's os.walk function on FTP server

Question

How can I make os.walk traverse the directory tree of an FTP database (located on a remote server)? The way the code is structured now is (comments provided):

Answer 1

I needed a function like os.walk on FTP and there where not any so i thought it would be useful to write it , for future references you can find last version here

by the way here is the code that would do that :

def FTP_Walker(FTPpath,localpath):
    os.chdir(localpath)
    current_loc = os.getcwd()
    for item in ftp.nlst(FTPpath):
        if not is_file(item):
            yield from FTP_Walker(item,current_loc)

        elif is_file(item):
            yield(item)
            current_loc = localpath
        else:
            print('this is a item that i could not process')
    os.chdir(localpath)
    return


def is_file(filename):
    current = ftp.pwd()
    try:
        ftp.cwd(filename)
    except Exception as e :
        ftp.cwd(current)
        return True

    ftp.cwd(current)
    return False

how to use:

first connect to your host :

host_address = "my host address"
user_name = "my username"
password = "my password"


ftp = FTP(host_address)
ftp.login(user=user_name,passwd=password)

now you can call the function like this:

ftpwalk = FTP_Walker("FTP root path","path to local") # I'm not using path to local yet but in future versions I will improve it. so you can just path an '/' to it 

and then to print and download files you can do somthing like this :

for item in ftpwalk:
ftp.retrbinary("RETR "+item, open(os.path.join(current_loc,item.split('/')[-1]),"wb").write) #it is downloading the file 
print(item) # it will print the file address

( i will write more features for it soon so if you need some specific things or have any idea that can be useful for users i'll be happy to hear that )