# How do you sort a list containing tuples?

## How do you sort a list containing tuples?

Use a lambda function as an argument to **sort**() to **sort a list of tuples** by the second value. Call **list**. **sort**(key=None) with **list** as a **list of tuples** and key set to lambda x: x[1] to **sort list** by the second element **of** each **tuple**.

## Can we sort tuples in Python?

In **Python**, there are two ways, **sort**() and **sorted**() , to **sort** lists ( list ) in ascending or descending order. If **you** want to **sort** strings ( str ) or **tuples** ( **tuple** ), use **sorted**() .

## How do you sort a list in descending order python?

If you want to **sort** in a **descending order**, all you have to do is add the parameter reverse = True to either the **sort** or **sorted** functions. They both accept it!

## What is the difference between sorting and filtering?

Essentially, **sorting and filtering** are tools that let you organize your data. When you sort data, you are putting it in order. **Filtering** data lets you hide unimportant data and focus only on the data you're interested in.

## Is sorted function in Python?

**Python sorted**() **Function** The **sorted**() **function** returns a **sorted** list of the specified iterable object. ... Strings are **sorted** alphabetically, and numbers are **sorted** numerically. Note: You cannot **sort** a list that contains BOTH string values AND numeric values.

## Can you sort a set?

A **set** is an unordered **collection** with no duplicate elements. **Set** objects also support mathematical operations like union, intersection, difference, and symmetric difference. That means **you** will never be able to **sort** items inside a **set***.

## How do I sort a LinkedHashSet?

**Different ways to sort LinkedHashSet :**

- Convert
**LinkedHashSet**to TreeSet for natural-ordering. - Convert
**LinkedHashSet**to TreeSet for reverse-ordering by providing Comparator based customized-**sorting**logic. - Using ArrayList and Collections class' utility method
**sort**();

## How do you sort TreeSet?

The **TreeSet** implementation is **sorting** by the lexicographic order of the string values you insert. If you want to **sort** by the integer value, then you'll need to do as these others suggested and create a new object and override the compareTo method, or use your own comparator.

## How do you sort an ArrayList?

Approach: An **ArrayList** can be **Sorted** by using the **sort**() method of the Collections Class in Java. This **sort**() method takes the collection to be **sorted** as the parameter and returns a Collection **sorted** in the Ascending **Order** by default.

## Which is the fastest sorting method?

The time complexity of Quicksort is O(n log n) in the best case, O(n log n) in the average case, and O(n^2) in the worst case. But because it has the best performance in the average case for most inputs, Quicksort is generally considered the “**fastest**” **sorting algorithm**.

## How do you sort an ArrayList in alphabetical order?

To **sort** the **ArrayList**, you need to simply call the Collections. **sort**() method passing the **ArrayList** object populated with country names. This method will **sort** the elements (country names) of the **ArrayList** using natural **ordering** (**alphabetically** in ascending **order**).

## Can you sort a HashMap?

**HashMap** is not meant to keep entries in **sorted** order, but **if you** have to **sort HashMap** based upon keys or values, **you can do** that in Java. **Sorting HashMap** on keys is quite easy, all **you** need to **do** is to create a TreeMap by copying entries from **HashMap**. ... This is similar of how **you sort** an ArrayList in Java.

## How do I sort HashSet?

**Steps:**

- Create new
**HashSet**object. - Store
**HashSet**contents into ArrayList using inter-conversion constructor. - Finally, invoke Collections.
**sort**(al); method to**sort**elements in ascending**order**. - Note: similarly elements can be
**sorted**in descending**order**as well using Comparator.

## How do you sort a HashMap in reverse order?

**Below are the steps:**

- Obtain stream from Set view of the mappings contained in the map.
**Sort**the stream in**reverse order**of keys using Stream.**sorted**() method.- Construct a LinkedHashMap from the stream using Stream. collect() with Collectors. toMap() .

## How do I sort a TreeMap in reverse order?

By default **TreeMap** elements in Java are **sorted** in ascending **order** of keys. However, we can create the **TreeMap in reverse order** using Collections. **reverseOrder**() method in Java and display the elements in **descending order** of keys. The Collections.

## Why NULL is not allowed in TreeMap?

**Null** Keys and **Null** Values What if we try to add one more element with a **null** key? **TreeMap** sorts elements in natural order and doesn't **allow null** keys because compareTo() method throws NullPointerException if compared with **null**.

#### Read also

- What does sort it out mean?
- Can you sort dictionaries in Python?
- How do I sort list view?
- Can we sort a list in Java?
- Will sort it out meaning?
- Can I sort a map in C++?
- How do you sort a dictionary key in Python?
- What is sort method in JavaScript?
- How do you sort in numbers?
- What is sort () in Python?

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