String encode

In one of the exercises, we make a hash function by using the string method encode. We then use sum to add up the values I am guessing. But I am confused about how we can use sum, since the encoding does not return only numbers, and neither an array.

For example

The string is: pythön!
The encoded version (with ignore) is: b’pythn!’
The encoded version (with replace) is: b’pyth?n!’



Could you provide a link to the exercise?

why is b’hey’ iterable… we can use sum on it?

also why when you say b’hey’[0] you get 104 and not h?

How can I convert b’hey’ into the numbers that print out when you call them by index?

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