SoftTimur :
I have a list of strings.
I would like to sort them based on 2 criteria:
- from small length to large length
- if the length of 2 strings are same, then sort by
<of string values
Does anyone know how to achieve that in Python?
I tried
def cmp(a,b):
if len(a) < len(b):
return -1
elif len(a) > len(b):
return 1
elif a < b:
return -1
elif a > b:
return 1
else:
return 0
myList.sort(lambda x,y: cmp(x, y))
But it gave me an error TypeError: sort() takes no positional arguments.
Mark Meyer :
You don't really need all the branching. The pythonic way is to just return a tuple which will sort in the order of the tuple:
s = ['twenty', 'three', 'two','one', 'four']
sorted(s, key=lambda w: (len(w), w))
# ['one', 'two', 'four', 'three', 'twenty']
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