[Tutor] improve the code

[Peter Otten]

lina wrote:

>> sorted(new_dictionary.items())
> 
> Thanks, it works, but there is still a minor question,
> 
> can I sort based on the general numerical value?
> 
> namely not:
> :
> :
> 83ILE 1
> 84ALA 2
> 8SER 0
> 9GLY 0
> :
> :
> 
> rather 8 9 ...83 84,
> 
> Thanks,

You need a custom key function for that one: 

>>> import re
>>> def gnv(s):
...     parts = re.split(r"(\d+)", s)
...     parts[1::2] = map(int, parts[1::2])
...     return parts
...
>>> items = [("83ILE", 1), ("84ALA", 2), ("8SER", 0), ("9GLY", 0)]
>>> sorted(items, key=lambda pair: (gnv(pair[0]), pair[1]))
[('8SER', 0), ('9GLY', 0), ('83ILE', 1), ('84ALA', 2)]