FTP upload with Python

ftpupload.py

"""Upload file to folder.

Note:
    Written for Python 3.7.
"""


import os
import ftplib


FTP_ADDR = "ftp.address.com"
USERNAME = "username"
PASSWORD = "password"
DST_FOLDER = "someFolder"
SRC_FILEPATH = "kitten.jpg"
DST_FILENAME = "kiten2.jpg"


def chdir(session, dirpath):
    """Change to directory."""
    if directory_exists(session, dirpath) is False: # (or negate, whatever you prefer for readability)
        print("Creating folder %s..." % dirpath)
        session.mkd(dirpath)
    print("Changing to directory %s..." % dirpath)
    session.cwd(dirpath)


def directory_exists(session, dirpath):
    """Check if remote directory exists."""
    filelist = []
    session.retrlines('LIST',filelist.append)
    for f in filelist:
        if f.split()[-1] == dirpath and f.upper().startswith('D'):
            return True
    return False

def main():
    """Transfer file to FTP."""

    # Connect
    print("Connecting to FTP...")
    session = ftplib.FTP(FTP_ADDR, USERNAME, PASSWORD)


    # Change to target dir
    chdir(session, dirpath=DST_FOLDER)

    # Transfer file
    print("Transferring %s and storing as %s..." % (os.path.basename(SRC_FILEPATH), DST_FILENAME))
    with open(SRC_FILEPATH, "rb") as file:
        session.storbinary('STOR %s' % os.path.basename(DST_FILENAME), file)

    print("Closing session.")
    # Close session
    session.quit()

main()