CODEWITHSUNDEEP
pythonstringsortingfloating-pointdouble
RonanFelipe
RonanFelipe

Reputation: 657

How to sort a list of string that have float numbers in the middle?

I need to sort a list of strings based on a float value in the middle of the string.

I've seen some answers getting a key keys.sort(key=float), but on those answers they have only the float numbers inside the list. In this case I need to convert that piece of the string to float and sort it based on that value. At the end I will need the whole string.

list_of_msg = []
msg1 = "buy.apple<100; 21.15; Jonh>"
msg2 = "buy.apple<100; 20.00; Jane>"
msg3 = "buy.apple<50; 20.10; Anne>"
list_of_msg.append(msg1)
list_of_msg.append(msg2)
list_of_msg.append(msg3)
# sort method goes here
print(list_of_msg)

Expected this to be sorted based on the values 21.15, 20.00, 20.10 

 ['buy.apple<100; 20.00; Jane>', 'buy.apple<50; 20.10; Anne>', 
 'buy.apple<100; 21.15; Jonh']

Upvotes: 0

Views: 191

Answers (1)

Austin
Austin

Reputation: 26039

Use sorted / sort with key argument:

sorted(list_of_msg, key=lambda x: float(x.split(';')[1].strip()))

We split elements in original list based on ';' and take second split which is passed as key argument.

Upvotes: 3

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