[Python-Dev] whitespace normalization (original) (raw)

skip at pobox.com skip at pobox.com
Thu Apr 26 04:53:01 CEST 2007 

>> Just a little FYI, python-mode (the one Barry and I manage - dunno
>> about the one distributed w/ GNU Emacs these days) is one of those
>> tools that leaves trailing whitespace behind when advancing to the
>> next line..

(See my earlier retraction...)

Greg> I get extremely annoyed with editors that *don't* leave whitespace
Greg> at the end of lines alone, at least while you're working on the
Greg> file. You type part of a line, leave a space, go to copy something
Greg> from somewhere else to put on the end, and when you get back, the
Greg> space you deliberately left there is gone.

That's not the way python-mode works. If I enter this:

def f(a):
    b = a * a
    @
    %

then hit LF or RET after the statement, it inserts a newline and inserts enough spaces to leave the cursor where I placed the @ sign. If I hit another LF or RET it removes the "trailing" whitespace on the current line, enters a newline and inserts enough spaces to leave the cursor where I placed the % sign.

Greg> Stripping trailing whitespace on saving wouldn't be
Greg> so bad, though. Is there an option for that in python-mode?

Not by default. You could add a hook to write-file-hooks though.

Skip

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