Write a python program that defines a matrix and prints

Sure, here is a simple Python program that defines a 2D matrix and prints it:

# Define a 2D matrix
matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

# Print the matrix
for row in matrix:
    for element in row:
        print(element, end=' ')
    print()

This program first defines a 2D matrix (which is a list of lists in Python). Then it uses two nested for loops to iterate over the rows and the elements within each row. The print function is used to print each element, and end=' ' is used to print a space after each element instead of a newline. The print() statement without any arguments is used to print a newline after each row.