def post_multipart(host, selector, fields, files):
    """
    Post fields and files to an http host as multipart/form-data.
    fields is a sequence of (name, value) elements for regular form fields.
    files is a sequence of (name, filename, value) elements for data to be uploaded as files
    Return the server's response page.
    """

import ftplib
s = ftplib.FTP('myserver.com','login','password') # Connect

f = open('todo.txt','rb')                # file to send
s.storbinary('STOR todo.txt', f)         # Send the file

f.close()                                # Close file and FTP
s.quit()