Using while loop and if statement to tell if a binary has an odd or even number of 1's.

[todpose at hotmail.com]

Using while loop and if statement, I'm trying to get Python to tell me whether there are even or odd number of 1's in a binary representation.
For example, if I give Python a 00000111, then I want it to say that the binary representation given has an odd number of 1's.
If I give it 00010111, then it will tell me that there is an even number of 1's.
I'd appreciate any suggestion.
Thanks!
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