• help with diagonals

Question related to mission Find Sequence

 

I have been working on this task but cannot find an algorithm to find diagonal sequences, any help will be appreciated. My actual code is:

def obtener_d_princ(m):
    [SPOILER]
Created at: 2014/04/07 20:27; Updated at: 2016/09/23 13:32
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SantiagoSaid