Aug 21, 2011 · 2 A lambda function is useful if your sorting function takes a support argument, otherwise function name is enough. For example, if you want to sort list of string representation of datetime by …

The .sort () function stores the value of new list directly in the list variable; so answer for your third question would be NO. Also if you do this using sorted (list), then you can get it use because it is not …

Aug 30, 2008 · As sort() sorts the list in place (ie, changes the list directly), it doesn't return the sorted list, and actually doesn't return anything, so your print statement prints None. If you saved your list to …

Dec 29, 2009 · Sequences can contain any objects, not even comparable, but if we can define a function which produces something we can compare for each of the items, we can pass this function in key …

The function you pass in to key is given each of the items that are being sorted, and returns a "key" that Python can sort by. So, if you want to sort a list of strings by the reverse of the string, you could do this:

Apr 20, 2010 · This is a strange answer because you do the sorting in-place but then the reversing out-of-place. If there is another variable aliasing the original list, its value afterwards will not have the …

I have a list of lists, 50 times 5 elements. I want to sort this list by applying a custom compare function to each element. This function calculates the fitness of the list by which the elements shall be sorted. I …

6 This strictly follows your requirements not to use sort(), min(), max() but also uses Python best practice by not re-inventing the wheel.

@Cemre as for the second example, sort here is a method of List object of Python, which receives a lambda function as its key parameter. You may name it as tup, or t, or whatever you like and it'll still …

Mar 20, 2012 · You don't need a custom function for what you want to achieve, you first need to understand the methods you are using! sort() ing a list in python does it in place, that is, the return …