Build a Simple FTP Server in 9 Python Lines with pyftpdlib

Today's experiment demonstrates how to set up a basic FTP server in just nine lines of Python.

Required third‑party library: pyftpdlib . Install it with pip3 install pyftpdlib.

Below is the complete script (the image shows the code):

Only two lines need customization:

authorizer.add_user("ljds", "ljds", ".", perm="elradfmw")

This line creates the FTP login username, password, root directory (here the current directory .), and permission set. The permission codes are listed in the following table:

server = FTPServer(("192.168.1.102", 21), handler)

This line starts the server on the host IP 192.168.1.102 and the default FTP port 21.

Run the script, then open a browser or any FTP client and navigate to ftp://192.168.1.102. After entering the correct username and password, you will see the FTP directory listing.

Experiment completed!

My confusion: Using 127.0.0.1 as the server address works on the same machine but not from other computers, while 192.168.1.102 works on both local and remote machines. This discrepancy may be due to network interface binding or firewall settings.