python - Converting a string of numbers to correpsonding letters -

for project working on, need able convert string of numbers letters form correct words. example, need convert 2626 bfbf, how make sure not turn zz instead or vice versa.

i extremely confused because cannot think of way make possible, , need program convert numbers original letters.

any appreciated, since not sure anymore…

thanks you!

edit: seems though impossible without using list of numbers, need find way replace strings lists. problem making public key cryptography encryptor/decryptor , not know how math on numbers without them being string. (it wouldn't work list, example if had square number, 1212, can 1212^2. if list [12,1,2], not know how square same answer 1212^2.)

any great, again!

using chr() can convert int letter, ex. print chr(97) prints a. if can use symbol identify groups, maybe '-', between numbers, simple problem. if not run ambiguous mappings mentioned.

for example create number letter dictionary:

alphabet_dict = {} abet in range(1, 27):     alphabet_dict[abet] = chr(96+abet)  print alphabet_dict 

prints:

{1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e', 6: 'f', 7: 'g', 8: 'h', 9: 'i', 10: 'j', 11: 'k', 12: 'l', 13: 'm', 14: 'n', 15: 'o', 16: 'p', 17: 'q', 18: 'r', 19: 's', 20: 't', 21: 'u', 22: 'v', 23: 'w', 24: 'x', 25: 'y', 26: 'z'} 

now if decide can use symbol delimiter, can use built in split() break our string list , map values (numbers) alphabet using dictionary above:

s = '2-6-2-6' def convert_num_to_alpha(num_string):     num_list = num_string.split('-')     abet_string = ''     num in num_list:         abet_string = abet_string+alphabet_dict[int(num)]     return abet_string   print convert_num_to_alpha(s) # prints: bfbf print convert_num_to_alpha('26-26') # prints: zz 

edit: how convert string of number-number (e.g. '2-6-2-6') int:

this hackish if need arithmetic on number, have stored string can like:

print int('2-6-2-6'.replace('-', ''))  # prints: 2626