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Introduction

In another article on using ftplib in Python, we talked about using Python’s ftplib library to connect to an FTP server and download both binary and text files to our local machine. In this segment, I’ll introduce several new concepts, including uploading text and binary files, error handling, and common directory commands using the same imported library.
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Prerequisites

It is difficult to experiment with many of these calls with a server that you don’t own–most FTP servers will not allow anonymous logins. Assuming you do not have access to a web-based FTP server, your best bet is to install a server on your local machine (see “Installing an FTP server“) and test your code using localhost as the target server.
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FTP Uploads

As with downloads, you’ll need to specify whether a file you wish to upload to a server is a text file or a binary file since each uses a different method. You can upload text files using the storlines() method and binary files with the storbinary() method. A nice feature of these functions is that neither one requires you to write a separate function to handle reading the source file: storlines() calls the readline() method on each line in the file until it reads the last line, while storbinary() uses the read() method until there is no more data to read and upload.

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