On 19/07/2014 18:38, C.D. Reimer wrote:
Greetings,
I typically write a Python 2.7 string function in my library like this:
def getCompletedTime(start, end): return "Time completed:", str(end
- start)
And called it like this:
print getCompletedTime(start, end)
Since every Python script I write is executed from the command line, I
rewrote the string function like this:
def getCompletedTime(start, end): print "Time completed:", str(end
- start)
And call it like this:
getCompletedTime(start, end)
The first version is what I'm familiar with having reluctantly learned
Java at community college, which couldn't afford a Microsoft site
license for Visual C++ and taught every class in Java. (The Linux
instructor rebelled against this policy by teaching basic C/C++ and
shell scripting in his classes.) I recently read an article that Python
is replacing Java as a teaching language.
The second version is more straight forward but seems less readable
(i.e., "print getCompletedTime(start, end)" vs. "getCompletedTime(start,
end)") from the calling script.
Alternatively, I thought about rewriting the string function to accept
an extra parameter to do either and default to the print statement.
def getCompletedTime(start, end, type = 'p'):
string = "Time completed: " + str(end - start)
if type == 'p':
print string
else:
return string
I'm curious as to what the proper Python style would be for this.
Thank you,
Chris Reimer
Besides that I wouldn't write the function on one line, the first. Once
you return your data you can do what you want with it. The second you
can only write by default to stdout. The third is really horrible in my
book, YMMV.
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
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