Posted By: Anonymous
There are several ways to write to stderr:
# Note: this first one does not work in Python 3 print >> sys.stderr, "spam" sys.stderr.write("spamn") os.write(2, b"spamn") from __future__ import print_function print("spam", file=sys.stderr)
That seems to contradict zen of Python #13 †, so what’s the difference here and are there any advantages or disadvantages to one way or the other? Which way should be used?
† There should be one — and preferably only one — obvious way to do it.
I found this to be the only one short + flexible + portable + readable:
from __future__ import print_function import sys def eprint(*args, **kwargs): print(*args, file=sys.stderr, **kwargs)
eprint can be used in the same way as the standard
>>> print("Test") Test >>> eprint("Test") Test >>> eprint("foo", "bar", "baz", sep="---") foo---bar---baz