In the above image, we can see that an index uniquely identifies each array element. In this Python List tutorial, you will learn:
How to Create Array in Python? Accessing the values Inserting the values into the two-dimensional array Updating the values into the two-dimensional array Deleting the values from two-dimensional array Get the size of two-dimensional array
How to Create Array in Python?
We can create a two-dimensional array(list) with rows and columns. Syntax: Where, r stands for rows and c stands for columns Example: Following is the example for creating 2D array with 4 rows and 5 columns Output:
Accessing the values
We can access the values using index position Syntax: We can get row value using [] operator We can get column value using [][] where,
array is an input array row index is the row index position starts from 0 column index is the column index position starts from 0 in a row.
Example: In this example we are going to access the values using index positions Output: We can also access elements using for loop Syntax: where,
rows are used to iterate the row by row columns is used to iterate the values present in each row.
Example: Output:
Inserting the values into the two-dimensional array
Here we are going to insert values into two dimensional array using insert() function Syntax: where,
the array is the input array the index is the row position to insert a particular row value are the values to be inserted into the array
Example: Insert to values in the array Output:
Updating the values into the two-dimensional array
Here are two methods for updating values in the 2-D array(list). You can update rows by using the following syntax You can update column values inside rows by using the following syntax Example: Output:
Deleting the values from two-dimensional array
You can delete rows using the del function Syntax: where,
the array is the input array index refers to the row index
Example: Output:
Get the size of two-dimensional array
You can get the size of the two-dimensional array using the line() function. It will return the number of rows in the array Syntax: Example: Get the length of the two-dimensional array Output:
Summary:
Here are some important Array(list) Methods
