Question

Does anyone have the answer(code) to Problem 3(multi-level encryption & decryption) from Problem set #4?

I did not see that answer in the solutions file. Thanks.

Answer 1

hey a better way would be you write your own code and then if you face any problem put it here
if you have already written then you may post your code here for discussion

Answer 2

Ok I tried to make an attempt at this problem (attached below). My answer is wrong. Can someone provide the correct code and/or evaluate my code. Thanks.

http://pastebin.com/0Y67n61r

Answer 3

I did this problem for edX, which is based on the OCW version, but I don't seem to have a function "apply_shifts"
I have "apply_shift" and "find_best_shift", but it didn't require tuples so it's hard for me to figure out how to make compare your code and mine.

Answer 4

actually i didn`t get what whole of your code meant but still i recommend that you have different functions
one creating the dictionary with letter as key and shifted one{which you have already done as build_encoder (perhaps)
other function of applying the shifts i.e apply_shifts

i had followed this approach
take some newstring
then suppose you have to apply (3, 6) sought of thing
newstring = pick upto 3rd letter the input text + shifted text for the rest

try it by this approach if still there is any problem i will elaborate using my code

Hope this helps

Answer 5

Thanks guys for the input. I just found my mistake. My new code works. My mistake was that in line 28 of the previous code I inputed "placeholder[key:]" whereas I should have used just "placeholder". I changed that variable name to new_shift in the code below. Placeholder was a terrible name for that variable. Cheers.

http://pastebin.com/cuyib61q

Answer 6

how about this one...much shorter tough
http://pastebin.com/gicZ3qYc