Configure Python in Sublime Text: Fix Encoding Errors & Run Scripts with Ctrl+B

Problem: Ctrl+B Does Nothing Without a Configured Interpreter

A beginner asked why pressing Ctrl+B in Sublime Text produced no output when trying to run a Python script. The cause was a missing Python interpreter configuration — Sublime Text does not know which python.exe to invoke or how to handle non-ASCII output.

Step-by-Step Configuration

Open Preferences → Browse Packages… — This opens the Sublime Text packages directory.

Locate the Python folder and open Python.sublime-build in Sublime Text.

Edit the build file — The original content is minimal. Two key changes are required:

Add the path pointing to your Python installation (e.g., "path": "C:\\Python34").

Add an encoding field ( utf-8, gbk, or cp936) to prevent [Decode error - output not utf-8] when the script prints non-English characters.

Save with Ctrl+S .

Select the build system — Go to Tools → Build System → Python.

Run a Python file — Press Ctrl+B or choose Tools → Build. Output appears in the bottom panel.

Modified Python.sublime-build Example

{
  "cmd": ["python.exe", "-u", "$file"],
  "path": "C:\\Python34",
  "file_regex": "^[ ]*File\"(...*?)\", line ([0-9]*)",
  "encoding": "gbk",
  "selector": "source.python"
}

The encoding field is critical: without it, any non-English output triggers a decode error. The author notes that utf-8, gbk, or cp936 all work; try each if one fails.

Verification

After configuration, opening any .py file and pressing Ctrl+B runs the script and shows output in Sublime Text's bottom output panel. The same steps apply to both Sublime Text 2 and Sublime Text 3.

Reference

Original CSDN article: https://blog.csdn.net/zz153417230/article/details/78935265