[Tutor] How to separate UI code from program logic?
robertvstepp at gmail.com
Tue May 8 14:55:34 EDT 2018
On Mon, May 7, 2018 at 12:26 AM, boB Stepp <robertvstepp at gmail.com> wrote:
> def get_collatz_number(integer):
> """Returns the Collatz sequence number corresponding to integer. integer
> must be > 0, or the sequence will not converge to 1."""
> if integer % 2 == 0:
> return integer // 2
> return 3 * integer + 1
> def generate_collatz_sequence(seed):
> """Creates a generator, which will yield a Collatz sequence starting from
> seed. seed must be a positive integer, or the sequence will not converge to
> collatz_number = seed
> while True:
> collatz_number = get_collatz_number(collatz_number)
> yield collatz_number
> if collatz_number == 1:
> Questions and comments:
After taking a break from this and coming at this afresh, I
immediately saw an answer to this question:
> 2) I spent a lot of effort trying to come up with a way to combine
> the two functions, get_collatz_number() and
> generate_collatz_sequence(), into something both more compact and more
> readable, but I was unsuccessful. I suspect there is a better way.
> Is there? And how would I do it?
"""Creates a generator, which will yield a Collatz sequence starting from
seed. seed must be a positive integer, or the sequence will not converge to
collatz_number = seed
if collatz_number % 2 == 0:
collatz_number //= 2
collatz_number = 3 * collatz_number + 1
if collatz_number == 1:
Judging from the lack of responses, I guess I must have been on track
on the other questions.
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