Deleting files, keeping a few -- in Python

And the same again, only as a script, just because:

	import glob
	import os
	def fcompare(f1, f2):
	t1 = os.path.getmtime(f1)
	t2 = os.path.getmtime(f2)
	if t1 < t2:
	return -1
	if t1 > t2:
	return 1
	return 0
	# TODO: parametrise the pattern and the number to retain
	for f in sorted(glob.iglob('*.log'), cmp = fcompare, reverse = True)[3:]:
	os.remove(f)

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If there wasn't that comparison function to write, it'd be terser...