is there any principle when writing python function

[Roy Smith]

Chris Angelico <rosuav at gmail.com> wrote:

> the important
> considerations are not "will it take two extra nanoseconds to execute"
> but "can my successor understand what the code's doing" and "will he,
> if he edits my code, have a reasonable expectation that he's not
> breaking stuff". These are always important.

Forget about your successor.  Will *you* be able to figure out what you 
did 6 months from now?  I can't tell you how many times I've looked at 
some piece of code, muttered, "Who wrote this crap?" and called up the 
checkin history only to discover that *I* wrote it :-)