[Tutor] Rounding to n significant digits?

[Alan Gauld]

Hi Gregor,

> def eng_round_to_n(x,n):
>     man,exp = round_to_n(x, n).split("e") # contains error-handling
>     sh=int(exp)%3
>     return "%.*fe%+04i" % (n-1-sh,float(man)*10**sh,int(exp)-sh)

Eek! Are you sure that last line is Python and not Perl?   
Winner of this months obfuscated tutor code I think...
I'll take your word for it that it works.

;-)

Alan G