Which ones? Org mode's babel works fine with it. If you do something like this (loose, not precise babel syntax): <<body>>= if 1 == 1: print('1 =

Which ones? Org mode's babel works fine with it. If you do something like this (loose, not precise babel syntax): <<body>>= if 1 == 1: print('1 == 1, shocking!') <<function>>= def foo(): <<body>> It will generate properly indented code when tangled as in: def foo(): if 1 == 1 print('1 == 1, shocking!') Note that it puts in precisely two extra spaces for each line in the tangled `body`, which is the amount used in the block named `function` where it references `body`. If you used 4 spaces of indentation, it would use 4 in the tangled output. I've also used noweb and don't recall this being an issue, however that was not with Python so it's possible I just didn't notice a problem with it.