Python Tutorials
Python Introduction
Python Get Started
Python Syntax
Python Comments
Python Variables
Python Data Types
Python Casting
Python Strings
Python Booleans
Python Operators
Python Lists
Python Tuples
Python Sets
Python Dictionaries
Python If...Else
Python While Loops
Python For Loops
Python Functions
Python Lambda
Python Arrays
Python Classes/Objects
Python Inheritance
Python Iterators
Python Scope
Python Modules
Python Dates
Python Math
Python JSON
Python RegEx
Python PIP
Python Try..Except
Python User Input
Python String Formatting
Python File Handling
Python File Handling
Python Read Files
Python Create/Write Files
Python Delete Files
Python Modules
Python Numpy
Python Pandas
Python SciPy
Previous
Python Arrays
Note: Python has no built-in support for Arrays, but Python Lists can be used instead.
Arrays
Note: This page shows you how to use the LIST AS A MEMBER, however, in order to work with arrays in Python you will need to enter a library, such as NumPy Library.
Arrays are used to store multiple values for one variation:
Example
Create an array containing car names:
cars = ["Ford", "Volvo", "BMW"]
What is an Array?
The same members are a special kind of specialty, which can hold more than one value at a time.
If you have a list of items (a list of car names, for example), keeping single variable cars may look like this:
car1 = "Ford"
car2 = "Volvo"
car3 = "BMW"
However, what if you want to get in the car and find one? And what if you did not have 3 cars, but 300?
The solution is a program!
A list can hold multiple values under one word, and you can access values by referring to the reference number.
Access the Elements of an Array
Refers to the same members by referring to the reference number.
Example
Get the value of the first array item:
x = cars[0]
Example
Modify the value of the first array item:
cars[0] = "Toyota"
The Length of an Array
Use the len() method to restore the length of the same element (number of items in the system).
Example
Return the number of elements in the cars array:
x = len(cars)
Note: The length of the same members is always higher than the maximum index of the same members.
Looping Array Elements
You can use the for in loop to disconnect from all features of the same member.
Example
Print each item in the cars array:
for x in cars:
print(x)
Adding Array Elements
You can use the append() method to add an item to the same component.
Example
Add one more element to the cars array:
cars.append("Honda")
Removing Array Elements
You can use the pop() method to remove an item from the list.
Example
Delete the second element of the cars array:
cars.pop(1)
You can also use the remove() method to remove an item from the list.
Example
Delete the element that has the value "Volvo":
cars.remove("Volvo")
Note: The remove() list method only removes the first occurrence of a specified value.
Array Methods
Python has a set of built-in methods that you can use in lists / programs.
| Method | Description |
|---|---|
| append() | Adds an element at the end of the list |
| clear() | Removes all the elements from the list |
| copy() | Returns a copy of the list |
| count() | Returns the number of elements with the specified value |
| extend() | Add the elements of a list (or any iterable), to the end of the current list |
| index() | Returns the index of the first element with the specified value |
| insert() | Adds an element at the specified position |
| pop() | Removes the element at the specified position |
| remove() | Removes the first item with the specified value |
| reverse() | Reverses the order of the list |
| sort() | Sorts the list |
Note: Python has no built-in support for Arrays, but Python Lists can be used instead.