how to get the thighest bit position in big integers?

[greg]

Terry Reedy wrote:

> str.find is an historical anomaly that should not be copied.  It 
> was(is?) a wrapper for C's string find function.  C routinely uses -1 to 
> mean None for functions statically typed to return ints.  The Python 
> version logically should return None and usually does for other functions.

Although Guido has defended it on the grounds that it can
be inconvenient having a function that returns different
types under different circumstances. Also it discourages
making the mistake of treating the return value as a
boolean.

-- 
Greg