PythonPythonError code

BlockingIOError

What does this code mean?

Code BlockingIOError · An issue reported by Python.

Official explanation · Original text

Raised when an operation would block on an object (e.g. socket) set for non-blocking operation. Corresponds to errno EAGAIN, EALREADY, EWOULDBLOCK and EINPROGRESS. In addition to those of OSError, BlockingIOError can have one more attribute:

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Code reference
Official exception and warning descriptions ↗
Definition and explanation · Not troubleshooting steps
General diagnostic guide
Read exception tracebacks and handle exceptions ↗
Product-wide · Not specific to this code

Source and terms of use

Built-in Exceptions — Python 3.15.2 documentation ↗

Creator: Python Software Foundation
License: Python Software Foundation License Version 2
Checked on: 2026-11-12

Modifications: English prose extracted; whitespace normalized; Korean context and classified official links added. Python code examples not redistributed.

Source details · Original licenses and notices

BlockingIOError