If you want to indent several lines in Python IDLE you just mark the lines and hit Tab. But what if you want to remove the indent from several lines? Shift+Tab does not work for
Shift-Tab
Ctrl-Tab
< key
depends on your editor.
in pythonwin,
SHIFT + TAB works
By default, IDLE has it on Shift-Left Bracket. However, if you want, you can customise it to be Shift-Tab by clicking Options --> Configure IDLE --> Keys --> Use a Custom Key Set --> dedent-region --> Get New Keys for Selection
Then you can choose whatever combination you want. (Don't forget to click apply otherwise all the settings would not get affected.)
If you're using IDLE, you can use Ctrl+]
to indent and Ctrl+[
to unindent.
Depends on your editor.
Have you tried Shift+Tab?
For IDLE, select the lines, then open the "Format" menu. (Between "Edit" and "Run" if you're having trouble finding it.) This will also give you the keyboard shortcut, for me it turned out that dedent shortcut was "Ctrl+["