ftplib os.listdir function

[heiner55]

Your script runs well with some changes:

#!/usr/bin/python3
import ftplib

def list_item(dirk,listofitems):
    if listofitems == []:
        ftpinstance.retrlines('NLST',listofitems.append) # dirs or files of the current dir

    mwd = ftpinstance.pwd() # absolute path
    for item in listofitems:
        try:
            ftpinstance.cwd(mwd+'/'+item+'/')
            listofitems2 = []
            ftpinstance.retrlines('NLST',listofitems2.append) #if not a dir, error occurs
            print (dirk,'d',item)
            list_item(dirk+'  ',listofitems2)
        except Exception as e:
            print (dirk,'f',item)

#main
ftpinstance = ftplib.FTP('ftp.adobe.com','anonymous','anonymous')
ftpinstance.cwd("pub/adobe/acrobat/win/Acrobat2017")

print("start")
list_item('', [])
print("end")