How to print a dictionary sorted by key integer Manawatu-Wanganui

how to print a dictionary sorted by key integer

Sorting Dictionary Descending By Value (Not String Compare) C# Sort Dictionary: Keys and Values Sort the keys and values in a Dictionary with orderby and query expressions. Sort Dictionary. Dictionary has no Sort method. If we need to loop through the Dictionary contents in sorted order, we must separately acquire the elements and sort them. Sort. Sorting approaches. We can sort a Dictionary with the Keys and Values properties and a List …

Ways to sort list of dictionaries by values in Python

Sorting a HashMap according to keys in Java GeeksforGeeks. 03/01/2018В В· Like C++ sort(), Java sort() and other languages, python also provides built in function to sort. The sort function can be used to sort the list in both ascending and descending order. To sort the list in ascending order. Syntax. List_name.sort() This will sort the given list in ascending order., 03/12/2009В В· I need to sort the integer key in Descending order.I also need to how to iterate thru this dictionary after sorting. Might be a Silly question..

18/02/2012В В· There's no default method like in a List(of Integer) to do this though, and I was wondering before I try any kind of weird methods to sync both the List(of Integer) with this dictionary, and keep their indexes so that I can somehow use the Key values in the dictionary to the sorted List(of Integer), I was wondering if anyone knew how to sort this. the key=asint is what tells sorted to treat those string keys as integers for sorting purposes, so that e.g. '2' sorts between '1' and '12', rather than after them both -- that's what you appear to require, as well as having all non-all-digits keys sort after all all-digits ones. If you need to also deal with all-digits key strings that express

Instead of Dictionary, I decided to use SortedDictionary. So: When I needed to print the SortedDictionary to a file, I wouldn't need to sort it again. Tip: By using SortedDictionary instead of custom Dictionary sorting code, you can reduce the footprint of your .NET program. If you've understood everything up until now, e.g. what a list and dictionary are, what the sorted function does, and what a key function is – then you're good to go. This section reviews other ways of writing out the same concepts, with cleaner-looking code at the cost of having to learn more about Python's standard library.

24/09/2016В В· Pandas: Sort rows or columns in Dataframe based on values using Dataframe.sort_values() Pandas : Sort a DataFrame based on column names or row index labels using Dataframe.sort_index() C++ : How to Sort a List of objects with custom Comparator or lambda function; Python: 4 ways to print items of a dictionary line by line 24/02/2018В В· list.sort( key=function ) list.sort() accepts an another argument key i.e. key Function. While sorting a list, all the elements of list will be compared with each other. Before comparison it will call the key function on each entry, to determine what should be compared. For example, To Sort a list of strings by length, provide len() as key

Read a XML file that contains a player's name and player's score and store it in a variable. I have been using a Dictionary. Place all these dictionaries into a List. Sort the list of dictionaries by the high score. (can't work this out) Have the ability to add another new score and sort again. Write the results back to the file I loaded it from. 09/06/2018В В· So, to sort the dictionary keys by length of string, we will pass a lambda function as key function that will return the size of string i.e.

How to sort integer list in python descending order. Try this, it’ll sort the list in-place in descending order (there’s no need to specify a key in this case):. 24/02/2018 · list.sort( key=function ) list.sort() accepts an another argument key i.e. key Function. While sorting a list, all the elements of list will be compared with each other. Before comparison it will call the key function on each entry, to determine what should be compared. For example, To Sort a list of strings by length, provide len() as key

Each value is associated with a string, called a key. We want to sort the values such that their corresponding keys are in order. The basic idea is that we want to sort our keys, and then look up the dictionary according to the sorted keys. But we have to be careful – we need to sort the keys without damaging the original dictionary. A good solution is to create a copy of the keys before … 03/12/2009 · I need to sort the integer key in Descending order.I also need to how to iterate thru this dictionary after sorting. Might be a Silly question.

Previous article of this segment dealt with sorting list of dictionaries by values using lambda function. Ways to sort list of dictionaries by values in Python – Using lambda function This article aims at performing this functionality using itemgetter and showing visible differences. 04/09/2018 · The sort function can be used to sort a list in ascending, descending or user defined order. To sort the list in ascending order. List_name.sort() This will sort the given list in ascending order. This function can be used to sort list of integers, floating point number, string and others

Java HashMap Search and Sort A HashMap has plenty of uses, so let's see how you can find keys and values, load data from a CSV file into one, and use it for sorting. by 03/09/2012В В· In C#, how do you output the contents of a Dictionary class? Once you have loaded a Dictionary class with keys and values, how do I cycle through them and output the individual values in a foreach loop? Web Master and Programmer В· var myDictionary = new Dictionary() { {"string 1", "string 2"}, {"string 3", "string 4

Sort Dictionary. A Dictionary cannot be sorted. But its keys can be arranged. We can loop over the string keys in alphabetical order. We obtain the Keys and sort them—and then loop over that. Values from the Dictionary can still be accessed. Example. First, let us look at a VB.NET program that adds five key and value pairs to a Dictionary(Of String, Integer). Then, we acquire the list … the key=asint is what tells sorted to treat those string keys as integers for sorting purposes, so that e.g. '2' sorts between '1' and '12', rather than after them both -- that's what you appear to require, as well as having all non-all-digits keys sort after all all-digits ones. If you need to also deal with all-digits key strings that express

03/01/2018 · Like C++ sort(), Java sort() and other languages, python also provides built in function to sort. The sort function can be used to sort the list in both ascending and descending order. To sort the list in ascending order. Syntax. List_name.sort() This will sort the given list in ascending order. How to sort Hashtable in java By Chaitanya Singh Filed Under: Java Collections Hashtable doesn’t preserve the insertion order, neither it sorts the inserted data based on keys or values.

15/05/2010 · The Dictionary class does not have inbuilt sort functionality and I was looking for a simple way to sort on the Values within the collection.After searching google, it became clear that there are several ways to achieve this, from implementing Lists, using LookUps and … Instead of Dictionary, I decided to use SortedDictionary. So: When I needed to print the SortedDictionary to a file, I wouldn't need to sort it again. Tip: By using SortedDictionary instead of custom Dictionary sorting code, you can reduce the footprint of your .NET program.

Sorting a List of Dictionaries in C#? Unity Answers

how to print a dictionary sorted by key integer

sort() in Python GeeksforGeeks. If you've understood everything up until now, e.g. what a list and dictionary are, what the sorted function does, and what a key function is – then you're good to go. This section reviews other ways of writing out the same concepts, with cleaner-looking code at the cost of having to learn more about Python's standard library., The other day I was asked if there was a way to sort a dictionary by value. If you use Python regularly, then you know that the dictionary data structure is by definition an unsorted mapping type. Some would define a dict as a hash table. Regardless, I needed a way to sort a nested … Continue reading Python 201: How to sort a dictionary by.

how to print a dictionary sorted by key integer

Sorting Python collections with the sorted method. Previous article of this segment dealt with sorting list of dictionaries by values using lambda function. Ways to sort list of dictionaries by values in Python – Using lambda function This article aims at performing this functionality using itemgetter and showing visible differences., Read a XML file that contains a player's name and player's score and store it in a variable. I have been using a Dictionary. Place all these dictionaries into a List. Sort the list of dictionaries by the high score. (can't work this out) Have the ability to add another new score and sort again. Write the results back to the file I loaded it from..

Sorting Dictionary Descending By Value (Not String Compare)

how to print a dictionary sorted by key integer

Keeping the key-values sorted by using a SortedDictionary. Key functions need not depend directly on the objects being sorted. A key function can also access external resources. For instance, if the student grades are stored in a dictionary, they can be used to sort a separate list of student names: 18/02/2012В В· There's no default method like in a List(of Integer) to do this though, and I was wondering before I try any kind of weird methods to sync both the List(of Integer) with this dictionary, and keep their indexes so that I can somehow use the Key values in the dictionary to the sorted List(of Integer), I was wondering if anyone knew how to sort this..

how to print a dictionary sorted by key integer

  • How to sort Hashtable in java BeginnersBook
  • Sorting a HashMap according to keys in Java GeeksforGeeks

  • Key functions need not depend directly on the objects being sorted. A key function can also access external resources. For instance, if the student grades are stored in a dictionary, they can be used to sort a separate list of student names: Key functions need not depend directly on the objects being sorted. A key function can also access external resources. For instance, if the student grades are stored in a dictionary, they can be used to sort a separate list of student names:

    Sort keys. How can you sort the keys in a dictionary? First you must acquire a list of the keys using the keys() method. Then, you can use the sorted built-in to order those keys.Dictionary. Note: This approach requires a lookup to get the values from the sorted key view. Another approach may be faster. 24/02/2018В В· list.sort( key=function ) list.sort() accepts an another argument key i.e. key Function. While sorting a list, all the elements of list will be compared with each other. Before comparison it will call the key function on each entry, to determine what should be compared. For example, To Sort a list of strings by length, provide len() as key

    How to sort Hashtable in java By Chaitanya Singh Filed Under: Java Collections Hashtable doesn’t preserve the insertion order, neither it sorts the inserted data based on keys or values. C# Sort Dictionary: Keys and Values Sort the keys and values in a Dictionary with orderby and query expressions. Sort Dictionary. Dictionary has no Sort method. If we need to loop through the Dictionary contents in sorted order, we must separately acquire the elements and sort them. Sort. Sorting approaches. We can sort a Dictionary with the Keys and Values properties and a List …

    Sort keys. How can you sort the keys in a dictionary? First you must acquire a list of the keys using the keys() method. Then, you can use the sorted built-in to order those keys.Dictionary. Note: This approach requires a lookup to get the values from the sorted key view. Another approach may be faster. Dim k As Variant For Each k In dict.Keys ' Print key and value Debug.Print k, dict(k) Next We can also loop through the keys although this only works with Early Binding. Dim i As Long For i = 0 To dict.Count - 1 Debug.Print dict.Keys(i), dict.Items(i) Next i Sorting the Dictionary. Sometimes you may wish to sort the Dictionary either by key or

    03/09/2012В В· In C#, how do you output the contents of a Dictionary class? Once you have loaded a Dictionary class with keys and values, how do I cycle through them and output the individual values in a foreach loop? Web Master and Programmer В· var myDictionary = new Dictionary() { {"string 1", "string 2"}, {"string 3", "string 4 18/02/2012В В· There's no default method like in a List(of Integer) to do this though, and I was wondering before I try any kind of weird methods to sync both the List(of Integer) with this dictionary, and keep their indexes so that I can somehow use the Key values in the dictionary to the sorted List(of Integer), I was wondering if anyone knew how to sort this.

    How to sort Hashtable in java By Chaitanya Singh Filed Under: Java Collections Hashtable doesn’t preserve the insertion order, neither it sorts the inserted data based on keys or values. 24/09/2016 · Pandas: Sort rows or columns in Dataframe based on values using Dataframe.sort_values() Pandas : Sort a DataFrame based on column names or row index labels using Dataframe.sort_index() C++ : How to Sort a List of objects with custom Comparator or lambda function; Python: 4 ways to print items of a dictionary line by line

    18/02/2012В В· There's no default method like in a List(of Integer) to do this though, and I was wondering before I try any kind of weird methods to sync both the List(of Integer) with this dictionary, and keep their indexes so that I can somehow use the Key values in the dictionary to the sorted List(of Integer), I was wondering if anyone knew how to sort this. Java HashMap Search and Sort A HashMap has plenty of uses, so let's see how you can find keys and values, load data from a CSV file into one, and use it for sorting. by

    C# Sort Dictionary: Keys and Values Sort the keys and values in a Dictionary with orderby and query expressions. Sort Dictionary. Dictionary has no Sort method. If we need to loop through the Dictionary contents in sorted order, we must separately acquire the elements and sort them. Sort. Sorting approaches. We can sort a Dictionary with the Keys and Values properties and a List … How to sort Hashtable in java By Chaitanya Singh Filed Under: Java Collections Hashtable doesn’t preserve the insertion order, neither it sorts the inserted data based on keys or values.

    24/02/2018 · list.sort( key=function ) list.sort() accepts an another argument key i.e. key Function. While sorting a list, all the elements of list will be compared with each other. Before comparison it will call the key function on each entry, to determine what should be compared. For example, To Sort a list of strings by length, provide len() as key How to sort Hashtable in java By Chaitanya Singh Filed Under: Java Collections Hashtable doesn’t preserve the insertion order, neither it sorts the inserted data based on keys or values.

    The other day I was asked if there was a way to sort a dictionary by value. If you use Python regularly, then you know that the dictionary data structure is by definition an unsorted mapping type. Some would define a dict as a hash table. Regardless, I needed a way to sort a nested … Continue reading Python 201: How to sort a dictionary by 03/10/2017 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

    how to print a dictionary sorted by key integer

    Instead of Dictionary, I decided to use SortedDictionary. So: When I needed to print the SortedDictionary to a file, I wouldn't need to sort it again. Tip: By using SortedDictionary instead of custom Dictionary sorting code, you can reduce the footprint of your .NET program. Sort Dictionary. A Dictionary cannot be sorted. But its keys can be arranged. We can loop over the string keys in alphabetical order. We obtain the Keys and sort them—and then loop over that. Values from the Dictionary can still be accessed. Example. First, let us look at a VB.NET program that adds five key and value pairs to a Dictionary(Of String, Integer). Then, we acquire the list …

    Ways to sort list of dictionaries by values in Python

    how to print a dictionary sorted by key integer

    How to sort Hashtable in java BeginnersBook. The other day I was asked if there was a way to sort a dictionary by value. If you use Python regularly, then you know that the dictionary data structure is by definition an unsorted mapping type. Some would define a dict as a hash table. Regardless, I needed a way to sort a nested … Continue reading Python 201: How to sort a dictionary by, 30/06/2018 · Python : How to Sort a Dictionary by key or Value ? Python : How to Remove multiple keys from Dictionary while Iterating ? python : How to create a list of all the keys in the Dictionary ? Python : How to add / append key value pairs in dictionary using dict.update() Python : How to get all keys with maximum value in a Dictionary.

    In C# how do you output the contents of a Dictionary class?

    Java HashMap Search and Sort DZone Java. Previous article of this segment dealt with sorting list of dictionaries by values using lambda function. Ways to sort list of dictionaries by values in Python – Using lambda function This article aims at performing this functionality using itemgetter and showing visible differences., 03/10/2017 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions..

    04/09/2018 · The sort function can be used to sort a list in ascending, descending or user defined order. To sort the list in ascending order. List_name.sort() This will sort the given list in ascending order. This function can be used to sort list of integers, floating point number, string and others As we know that HashMap doesn’t preserve any order by default. If there is a need we need to sort it explicitly based on the requirement. In this tutorial we will learn how to sort HashMap by keys using TreeMap and by values using Comparator.

    Key functions need not depend directly on the objects being sorted. A key function can also access external resources. For instance, if the student grades are stored in a dictionary, they can be used to sort a separate list of student names: 03/10/2017В В· A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

    C# Sort Dictionary: Keys and Values Sort the keys and values in a Dictionary with orderby and query expressions. Sort Dictionary. Dictionary has no Sort method. If we need to loop through the Dictionary contents in sorted order, we must separately acquire the elements and sort them. Sort. Sorting approaches. We can sort a Dictionary with the Keys and Values properties and a List … How to sort integer list in python descending order. Try this, it’ll sort the list in-place in descending order (there’s no need to specify a key in this case):.

    03/12/2009 · I need to sort the integer key in Descending order.I also need to how to iterate thru this dictionary after sorting. Might be a Silly question. 15/05/2010 · The Dictionary class does not have inbuilt sort functionality and I was looking for a simple way to sort on the Values within the collection.After searching google, it became clear that there are several ways to achieve this, from implementing Lists, using LookUps and …

    09/06/2018 · So, to sort the dictionary keys by length of string, we will pass a lambda function as key function that will return the size of string i.e. C# Sort Dictionary: Keys and Values Sort the keys and values in a Dictionary with orderby and query expressions. Sort Dictionary. Dictionary has no Sort method. If we need to loop through the Dictionary contents in sorted order, we must separately acquire the elements and sort them. Sort. Sorting approaches. We can sort a Dictionary with the Keys and Values properties and a List …

    You can use the generic SortedDictionary of Key and Value to automatically keep the key value items sorted by their keys. Any time you add a new key value pair the dictionary will reorder the items. The SortedDictionary was optimised for frequent changes to its list of items. Keep in mind that the items will… 30/06/2018 · Python : How to Sort a Dictionary by key or Value ? Python : How to Remove multiple keys from Dictionary while Iterating ? python : How to create a list of all the keys in the Dictionary ? Python : How to add / append key value pairs in dictionary using dict.update() Python : How to get all keys with maximum value in a Dictionary

    How to sort using your own function with key parameter? If you want your own implementation for sorting, sorted() also accepts a key function as an optional parameter. How to sort using your own function with key parameter? If you want your own implementation for sorting, sorted() also accepts a key function as an optional parameter.

    Sort keys. How can you sort the keys in a dictionary? First you must acquire a list of the keys using the keys() method. Then, you can use the sorted built-in to order those keys.Dictionary. Note: This approach requires a lookup to get the values from the sorted key view. Another approach may be faster. As we know that HashMap doesn’t preserve any order by default. If there is a need we need to sort it explicitly based on the requirement. In this tutorial we will learn how to sort HashMap by keys using TreeMap and by values using Comparator.

    03/12/2009В В· I need to sort the integer key in Descending order.I also need to how to iterate thru this dictionary after sorting. Might be a Silly question. 03/10/2017В В· A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

    15/05/2010 · The Dictionary class does not have inbuilt sort functionality and I was looking for a simple way to sort on the Values within the collection.After searching google, it became clear that there are several ways to achieve this, from implementing Lists, using LookUps and … How to sort using your own function with key parameter? If you want your own implementation for sorting, sorted() also accepts a key function as an optional parameter.

    Sorting Python collections with the sorted method

    how to print a dictionary sorted by key integer

    Java HashMap Search and Sort DZone Java. As we know that HashMap doesn’t preserve any order by default. If there is a need we need to sort it explicitly based on the requirement. In this tutorial we will learn how to sort HashMap by keys using TreeMap and by values using Comparator., Sort keys. How can you sort the keys in a dictionary? First you must acquire a list of the keys using the keys() method. Then, you can use the sorted built-in to order those keys.Dictionary. Note: This approach requires a lookup to get the values from the sorted key view. Another approach may be faster..

    Ways to sort list of dictionaries by values in Python. Dim k As Variant For Each k In dict.Keys ' Print key and value Debug.Print k, dict(k) Next We can also loop through the keys although this only works with Early Binding. Dim i As Long For i = 0 To dict.Count - 1 Debug.Print dict.Keys(i), dict.Items(i) Next i Sorting the Dictionary. Sometimes you may wish to sort the Dictionary either by key or, 03/01/2018В В· Like C++ sort(), Java sort() and other languages, python also provides built in function to sort. The sort function can be used to sort the list in both ascending and descending order. To sort the list in ascending order. Syntax. List_name.sort() This will sort the given list in ascending order..

    How to sort a dictionary having keys as a string of

    how to print a dictionary sorted by key integer

    How to sort a dictionary having keys as a string of. How to sort integer list in python descending order. Try this, it’ll sort the list in-place in descending order (there’s no need to specify a key in this case):. Dim k As Variant For Each k In dict.Keys ' Print key and value Debug.Print k, dict(k) Next We can also loop through the keys although this only works with Early Binding. Dim i As Long For i = 0 To dict.Count - 1 Debug.Print dict.Keys(i), dict.Items(i) Next i Sorting the Dictionary. Sometimes you may wish to sort the Dictionary either by key or.

    how to print a dictionary sorted by key integer


    Instead of Dictionary, I decided to use SortedDictionary. So: When I needed to print the SortedDictionary to a file, I wouldn't need to sort it again. Tip: By using SortedDictionary instead of custom Dictionary sorting code, you can reduce the footprint of your .NET program. 03/12/2009В В· I need to sort the integer key in Descending order.I also need to how to iterate thru this dictionary after sorting. Might be a Silly question.

    How to sort using your own function with key parameter? If you want your own implementation for sorting, sorted() also accepts a key function as an optional parameter. Dim k As Variant For Each k In dict.Keys ' Print key and value Debug.Print k, dict(k) Next We can also loop through the keys although this only works with Early Binding. Dim i As Long For i = 0 To dict.Count - 1 Debug.Print dict.Keys(i), dict.Items(i) Next i Sorting the Dictionary. Sometimes you may wish to sort the Dictionary either by key or

    03/12/2009 · I need to sort the integer key in Descending order.I also need to how to iterate thru this dictionary after sorting. Might be a Silly question. C# Sort Dictionary: Keys and Values Sort the keys and values in a Dictionary with orderby and query expressions. Sort Dictionary. Dictionary has no Sort method. If we need to loop through the Dictionary contents in sorted order, we must separately acquire the elements and sort them. Sort. Sorting approaches. We can sort a Dictionary with the Keys and Values properties and a List …

    How to sort Hashtable in java By Chaitanya Singh Filed Under: Java Collections Hashtable doesn’t preserve the insertion order, neither it sorts the inserted data based on keys or values. Previous article of this segment dealt with sorting list of dictionaries by values using lambda function. Ways to sort list of dictionaries by values in Python – Using lambda function This article aims at performing this functionality using itemgetter and showing visible differences.

    15/05/2010 · The Dictionary class does not have inbuilt sort functionality and I was looking for a simple way to sort on the Values within the collection.After searching google, it became clear that there are several ways to achieve this, from implementing Lists, using LookUps and … 03/10/2017 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

    How to sort using your own function with key parameter? If you want your own implementation for sorting, sorted() also accepts a key function as an optional parameter. 04/09/2018В В· The sort function can be used to sort a list in ascending, descending or user defined order. To sort the list in ascending order. List_name.sort() This will sort the given list in ascending order. This function can be used to sort list of integers, floating point number, string and others

    03/01/2018В В· Like C++ sort(), Java sort() and other languages, python also provides built in function to sort. The sort function can be used to sort the list in both ascending and descending order. To sort the list in ascending order. Syntax. List_name.sort() This will sort the given list in ascending order. 03/09/2012В В· In C#, how do you output the contents of a Dictionary class? Once you have loaded a Dictionary class with keys and values, how do I cycle through them and output the individual values in a foreach loop? Web Master and Programmer В· var myDictionary = new Dictionary() { {"string 1", "string 2"}, {"string 3", "string 4

    How to sort using your own function with key parameter? If you want your own implementation for sorting, sorted() also accepts a key function as an optional parameter. 18/02/2012В В· There's no default method like in a List(of Integer) to do this though, and I was wondering before I try any kind of weird methods to sync both the List(of Integer) with this dictionary, and keep their indexes so that I can somehow use the Key values in the dictionary to the sorted List(of Integer), I was wondering if anyone knew how to sort this.

    15/05/2010 · The Dictionary class does not have inbuilt sort functionality and I was looking for a simple way to sort on the Values within the collection.After searching google, it became clear that there are several ways to achieve this, from implementing Lists, using LookUps and … 24/09/2016 · Pandas: Sort rows or columns in Dataframe based on values using Dataframe.sort_values() Pandas : Sort a DataFrame based on column names or row index labels using Dataframe.sort_index() C++ : How to Sort a List of objects with custom Comparator or lambda function; Python: 4 ways to print items of a dictionary line by line

    Previous article of this segment dealt with sorting list of dictionaries by values using lambda function. Ways to sort list of dictionaries by values in Python – Using lambda function This article aims at performing this functionality using itemgetter and showing visible differences. Instead of Dictionary, I decided to use SortedDictionary. So: When I needed to print the SortedDictionary to a file, I wouldn't need to sort it again. Tip: By using SortedDictionary instead of custom Dictionary sorting code, you can reduce the footprint of your .NET program.

    how to print a dictionary sorted by key integer

    Dim k As Variant For Each k In dict.Keys ' Print key and value Debug.Print k, dict(k) Next We can also loop through the keys although this only works with Early Binding. Dim i As Long For i = 0 To dict.Count - 1 Debug.Print dict.Keys(i), dict.Items(i) Next i Sorting the Dictionary. Sometimes you may wish to sort the Dictionary either by key or 24/02/2018В В· list.sort( key=function ) list.sort() accepts an another argument key i.e. key Function. While sorting a list, all the elements of list will be compared with each other. Before comparison it will call the key function on each entry, to determine what should be compared. For example, To Sort a list of strings by length, provide len() as key