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Differences and Applications of List, Tuple, Set and Dictionary in Python
The high-level, interpreted programming language Python comes with a number of built-in data structures, including lists, tuples, sets, and dictionaries. These data structures are essential to the Python programming environment because they provide efficient ways to store and manage data. This article compares and contrasts several data structures, highlighting their advantages, disadvantages, and best-use scenarios in order to aid developers.
List
A list is an arranged data structure indicated by the square sections []. Since it is a variable information structure, you might change any of its parts whenever they have been added.
You can add, remove, or modify entries in a list using built-in methods like append(), remove(), and insert().
A list's singular things can likewise be gotten to and changed through slicing and ordering strategies, hence proving useful in scenarios where data is constantly changing and operation heavy functions.
A shopping list is a great use for a list because you can add, remove, or modify items as needed and can be utilized to store lists of values, such as lists of names or numbers.
Example
# Define a list of fruits
fruits = ['apple', 'banana', 'orange']
# Add a new fruit to the end of the list
fruits.append('kiwi')
# Print the contents of the list
print(fruits) # Output: ['apple', 'banana', 'orange', 'kiwi']
Tuple
A tuple is an ordered collection of items enclosed in brackets (). Since it is a permanent information structure, you can't change any of its parts after they have been added.
Once they are made, the parts of a tuple remain the same. However, you can create a new tuple by combining two or more tuples. In Python, data that doesn't need to be changed often is typically stored in tuples.
A tuple can be utilized, for example, to record a point's directions on a diagram. As you might return a tuple from a capability instead of creating unmistakable factors for everything, tuples are particularly useful for returning a few qualities from a capability.
Example
# Define a tuple of names
names = ('Alice', 'Bob', 'Charlie')
# Print the third name in the tuple
print(names[2]) # Output: Charlie
Set
A set is a group of distinct components that are not ordered and are contained in curly braces. It is a changeable data structure, thus when a set is created, you may add or delete elements from it. You can also perform set operations like union, intersection, and difference on sets.
Sets are commonly used in Python for performing mathematical operations like finding the intersection or union of sets and to eliminate repeating items.
Example
# Define a set of unique numbers
numbers = {1, 2, 3, 4, 4, 4}
# Print the contents of the set
print(numbers) # Output: {1, 2, 3, 4}
Dictionary
Curly braced collections of key-value pairs are the basis of a dictionary. It is a variable information structure, and that implies that you can add, eliminate, or change components in a word reference after creation. Indexing operations can be used to get to a key's value.
Dictionaries are commonly used in Python for storing data in a structured format. For example, you can use a dictionary to store the details of a student like name, age, and grade. Dictionaries are also useful for storing configuration settings in a program.
Example
# Define a dictionary of ages
ages = {'Hancock': 25, 'Julie': 30, 'Jamie': 35}
# Print the age of Hancock
print(ages['Hancock']) # Output: 25
Comparison Table
List |
Tuple |
Set |
Dictionary |
|
|---|---|---|---|---|
Syntax |
[ ] |
( ) |
{ } |
{ } |
Mutable/Immutable |
Mutable |
Immutable |
Mutable |
Mutable |
Order |
Ordered |
Ordered |
Unordered |
Unordered |
Duplicates |
Allowed |
Allowed |
Not Allowed |
Not Allowed |
Indexing |
Allowed |
Allowed |
Not Allowed |
Allowed |
Slicing |
Allowed |
Allowed |
Not Allowed |
Not Allowed |
Common Operations |
append(), insert(), remove(), pop(), extend() |
Concatenation, unpacking, indexing, slicing |
add(), remove(), union(), intersection(), difference() |
keys(), values(), items(), get() |
Applications |
Storing mutable sequences of items |
Storing immutable sequences of items, returning multiple values from a function |
Performing set operations, removing duplicates from a list |
Storing key-value pairs, providing structured access to data |
Limitations |
Slow when dealing with large lists, takes up more memory compared to tuples |
Cannot add, remove or modify elements after creation |
Does not preserve order, cannot store duplicates |
Keys must be unique and immutable, values can be mutable or immutable |
Conclusion
To effectively store and manipulate data, Python comes with a number of built-in data structures. The unmistakable qualities of records, tuples, sets, and word references make them proper for different use circumstances. By studying the various variants and applications of various data structures, developers can select the ideal data structure for their particular requirement.
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