[Tutor] Limitation of int() in converting strings

[Alan Gauld]

On 17/12/12 04:19, boB Stepp wrote:

> It is apparent that int() does not like strings with floating-point
> formats. None of my books (as far as my flipping can tell) or the
> below built-in help clarify this:
> ...
> Of course if I type int(float('10.0')) I get the desired 10 .

as indeed will

int(10.0)

So you are right, there is an inconsistency between how int() converts 
floating point numbers and how it converts strings. Even stranger since 
the underlying atoi() C function appears to handle float strings quite 
happily...

> So, I am guessing that to convert strings to integers with int() that
> the string must already be of integer format? What is the rationale
> for setting up int() in this manner?

No idea, you'd need to ask Guido, it's his language :-)

-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/