On http://docs.python.org/3.0/tutorial/datastructures.html#sets there is
the following section in the section on sets

>>> basket = {'apple', 'orange', 'apple', 'pear', 'orange', 'banana'}
>>> print(basket)
{'orange', 'bananna', 'pear', 'apple'}
>>> fruit = ['apple', 'orange', 'apple', 'pear', 'orange', 'banana']
>>> fruit = set(basket)               # create a set without duplicates
>>> fruit
{'orange', 'pear', 'apple', 'banana'}


The third command should be an assignment to basket rather than fruit.

Also, I see banana is misspelled on the first output line (line 3).

Fixed r67624.

I see that the spelling of banana has been fixed but what is the purpose of assigning fruit and then immediately reassigning it another value without even looking at the first assignment?

>>> fruit = ['apple', 'orange', 'apple', 'pear', 'orange', 'banana']
>>> fruit = set(basket)               # create a set without duplicates

Confirmed in trunk and 3.1

Replaced unused variable assignment with a call to set() for illustrative purposes.

You may want to add another space before the comment, otherwise it will be the only one not aligned with the others.

I guess giving fruit, the set of unique fruit a different name makes it more clear. Comments alignment fixed.

>>> basket = {'apple', 'orange', 'apple', 'pear', 'orange', 'banana'}
>>> print(basket)
{'orange', 'bananna', 'pear', 'apple'}
>>> fruit = ['apple', 'orange', 'apple', 'pear', 'orange', 'banana']
>>> uniquefruit = set(fruit)               # create a set without duplicates
>>> uniquefruit
{'orange', 'pear', 'apple', 'banana'}

I think this change fits well with the rest of the example without having to rework things.  Spacing fixed.

I'll get to this soon.

Fixed in r83809 and r83810.