Python code to create a 2d list

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PythonBaba
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In this article, we will discuss the simplest method to create a 2D or two-dimensional list in Python. You can also implement this code using the function as well as classes.

Python Code to create 2d or two-dimensional list

 

Python code implementation without user-defined functions & classes

Code: 

 

column_size = int(input("Enter size of column: "))
row_size = int(input("Enter size of row: "))

#Declaring an empty 1D list.
a = []
#Declaring an empty 1D list.
b = []

#Initialize the column.
for j in range(0, column_size):
        b.append(0)
#Append the column to each row.
for i in range(0, row_size):
    a.append(b)

# 2D array is created.
#Print the two dimensional list.
print(a)

 

Output: 

 

Enter size of column: 5
Enter size of row: 5
[[0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0]]

 

Python code implementation using the function

In this code, we will create a two-dimensional list using the function. We will take input from the user for row size and column size. We will pass the row size and column size to a function that will return the final two-dimensional list.

Code: 
def create_2d_list(row_size, column_size):
    #Declaring an empty 1D list.
    a = []
    #Declaring an empty 1D list.
    b = []
    #Initialize the column.
    for j in range(0, column_size):
        b.append(0)
    #Append the column to each row.
    for i in range(0, row_size):
        a.append(b)
    return a
column_size = int(input("Enter size of column: "))
row_size = int(input("Enter size of row: "))
a = create_2d_list(row_size, column_size)
print(a)
Output: 
Enter size of column: 4
Enter size of row: 5
[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]]
[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]]

 

Python code implementation using Classes

 

In this code, we will create a two-dimensional list using classes. We will take input from the user for row size and column size and pass it while creating the object list_object. We will then call the function using list_object.create_2d_list(), the function will return the two-dimensional list created.

 

Code: 
class two_d_list(object):
    def __init__(self, row_size, column_size):
        self.row_size = row_size
        self.column_size = column_size

    def create_2d_list(self):
        #Declaring an empty 1D list.
        a = []
        #Declaring an empty 1D list.
        b = []
        #Initialize the column.
        for j in range(0, self.column_size):
            b.append(0)
        #Append the column to each row.
        for i in range(0, self.row_size):
            a.append(b)
        return a


column_size = int(input("Enter size of column: "))
row_size = int(input("Enter size of row: "))


#Create an Object:
list_object = two_d_list(row_size, column_size )
print(list_object.create_2d_list())
Output: 
Enter size of column: 5
Enter size of row: 4
[[0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0]]