How to Shift a Region Left in Emacs for Python Coding?

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In Emacs, you can shift a region to the left using the built-in indent-rigidly command.

Here’s how to do it:

  1. First, select the region that you want to shift left. You can do this by pressing and holding the Shift key and then moving the cursor to highlight the desired region.
  2. Once you have selected the region, press C-x TAB or C-x C-i to invoke the indent-rigidly command. This command will indent the region one tab stop (or the number of spaces defined in tab-width) to the right.
  3. To shift the region to the left instead, you can use a negative prefix argument. For example, to shift the region left by one tab stop, you can press C-u -1 C-x TAB or C-u -1 C-x C-i. You can adjust the negative prefix argument to shift the region by more tab stops or spaces as needed.

Note that the indent-rigidly command works for any programming language mode in Emacs, including Python mode. However, it’s worth noting that Python code relies on indentation to determine block structure, so you should be careful when modifying indentation. Shifting code too far left or right could result in syntax errors or incorrect behavior.

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