How to write verbose scripts
steve at REMOVE-THIS-cybersource.com.au
Tue Sep 2 18:55:53 CEST 2008
I find myself writing command line tools in Python where I wish to
include "verbose" output to stdout.
I start with a helper function:
def print_(obj, level=0):
if _verbosity >= level:
And then I end up with functions or methods looking like this:
print_("status is good...", level=1)
print_("parrot is squawking strongly now", level=2)
print_("squawk squawk squawk", level=3)
That often means that my functions end up with more message printing code
than actual code. The whole thing seems messy and hard to manage for all
but the smallest scripts.
Worst of all, sometimes the messages I wish to print may be expensive to
compute, and I don't want to waste time computing them if they aren't
going to be printed because the verbosity is too low. But nor do I wish
to fill my code with this:
if _verbosity >= 3:
x = calculate_complicated_thing()
Is there a better way of doing this than the way I am going about it?
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