[BioPython] info_dictionary

[irene farabella]

hi
i am a beginner in python.
from  DSSP file i made a dictionary like that:
dict2[AA_num_dssp,chain] = (structure,AA_name_dssp)
i need of it in my small programm.
i never work with a dictionary that have the keys like that.
i have to sort the key of the dictionay... how can i do?
usualy when i have only the AA_num i can mutate it in a list an then sort
it...
but in this case...mmm
thanks for help me!!
and sorry for the english..