zen-of-python

raise statement on a conditional expression

raise statement on a conditional expression Question: How do I elegantly implement the "Samurai principle" (return victorious, or not at all) on my functions? return <value> if <bool> else raise <exception> Asked By: F.D.F. || Source Answers: Well, you could test for the bool separately: if expr: raise exception(‘foo’) return val That way, you could …

Total answers: 5

How to print to stderr in Python?

How do I print to stderr in Python? Question: There are several ways to write to stderr: print >> sys.stderr, "spam" # Python 2 only. sys.stderr.write("spamn") os.write(2, b"spamn") from __future__ import print_function print("spam", file=sys.stderr) What are the differences between these methods? Which method should be preferred? Asked By: wim || Source Answers: import sys sys.stderr.write() …

Total answers: 17