On Mon, May 15, 2017 at 9:03 AM, Terry Brown <terrynbr...@gmail.com> wrote:
# this script, when executed in a node
> from subprocess import Popen, PIPE
> cmd = Popen(['diff', 'this', 'that'], stdin=PIPE, stderr=PIPE)
> p.b += "%s\n%s" % cmd.communicate()
> c.redraw()
> # appends this text to that node, 'None' being stdout, and the errors
> being stderr.
> None
> diff: this: No such file or directory
> diff: that: No such file or directory
>
> But to diff the two previous nodes:
>
> p0 = p.copy().moveToThreadBack() # prev node
> p1 = p0.copy().moveToThreadBack() # prev prev node
>
> import difflib
> p.b += '\n'.join(difflib.unified_diff(
> p1.b.split('\n'), p0.b.split('\n'), fromfile='prev.prev',
> tofile='prev'))
> c.redraw()
>
​Thanks, Terry. This shows two reasonable solutions. There will be others,
depending on situation.
Edward
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