Скачать или смотреть Fixing the expected str, bytes or os.PathLike object, not _io.TextIOWrapper Error in Python FTP

Learn how to solve the common Python FTP error `expected str, bytes or os.PathLike object, not _io.TextIOWrapper` when uploading files.
---
This video is based on the question https://stackoverflow.com/q/66317672/ asked by the user 'jamjam46' ( https://stackoverflow.com/u/14914535/ ) and on the answer https://stackoverflow.com/a/66317892/ provided by the user 'Nerveless_child' ( https://stackoverflow.com/u/8047535/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How can I fix error: 'expected str, bytes or os.PathLike object, not _io.TextIOWrapper' in Python FTP

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Fix the expected str, bytes or os.PathLike object, not _io.TextIOWrapper Error in Python FTP

When working with FTP in Python, encountering errors can be frustrating, especially when you're trying to upload files from a user's PC to a web server. One common error you might face is: expected str, bytes or os.PathLike object, not _io.TextIOWrapper. This error occurs when the program expects a string or a byte-like object, but instead receives a different type — specifically a _io.TextIOWrapper. Let's dive deep into understanding why this happens and how to fix it.

Understanding the Error

The error typically stems from incorrect usage of the open() function in Python when defining the file object that you want to upload. In the code snippet you provided, the root of the problem lies in this line:

[[See Video to Reveal this Text or Code Snippet]]

What's Wrong Here?

Definition of htmlfile: The variable htmlfile is not storing the actual file name or path. Instead, it seems that you are trying to use the file object that was created previously when you opened your HTML file for writing. Using htmlfile directly in the open method causes a mismatch of expected data types, leading to the error you see:
expected str, bytes or os.PathLike object, not _io.TextIOWrapper

How to Fix It

To resolve this issue, you need to ensure that you are opening the file using the correct file name as a string rather than trying to re-open the file object itself. Here’s how you can make the necessary changes:

Correctly Define realname: When you define realname, make sure you also append the .html extension to it.

Use the Correct Filename in open(): You should reference the filename correctly when attempting to reopen the HTML file for reading.

Here's the corrected code:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes Made

Replaced htmlfile with a string representation of the filename (f"{realname}.html") when calling the open() function.

Used a context manager (with) to handle file opening and closing, which is a best practice for file operations in Python, ensuring that files are properly closed after usage.

Conclusion

The error expected str, bytes or os.PathLike object, not _io.TextIOWrapper is a common pitfall when working with file uploads in Python FTP. By ensuring that you are passing a string representation of the file name when opening the file for reading, you can prevent this error and successfully upload your files. Ensure that you understand the data types you are working with and always validate your variable types when filing I/O operations.

By making the adjustments as outlined above, you'll be on your way to a smoother development experience. Happy coding!