On Wed, Mar 3, 2010 at 3:45 PM, Wells <thewellsoli...@gmail.com> wrote: > This seems sort of odd to me: > >>>> a = 1 >>>> a += 1.202 >>>> a > 2.202 > > Indicates that 'a' was an int that was implicitly casted to a float.
Remember Python is dynamically typed. Values have types, but variables don't (I could do a = "foo" at the end of your code and Python won't complain). But yes, internally, Python converted the int to a float before doing the addition. > But: > >>>> a = 1 >>>> b = 3 >>>> a / b > 0 > > This does not implicitly do the casting, it treats 'a' and 'b' as > integers, and the result as well. Changing 'b' to 3.0 will yield a > float as a result (0.33333333333333331) This has been fixed in Python v3.x You can request the new behavior in earlier versions using a magic import: >>> from __future__ import division >>> a = 1 >>> b = 3 >>> a / b 0.33333333333333331 Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
