On 3/3/2014 4:42 AM, ast wrote:
Consider following code:
A=7
B=7
A is B
The 'is' operator has three uses, two intended and one not. In
production code, 'is' tests that an object *is* a particular singular
object, such as None or a sentinel instance of class object. In test
code, 'is' can also be used to test details of a particular
implementation, such as pre-allocation of small ints. New python
programmers also use it to confuse themselves.
--
Terry Jan Reedy
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