To use arrays in Python, you need to import either an array module or a NumPy package. import array as arr import numpy as np The Python array module requires all array elements to be of the same type. Moreover, to create an array, you'll need to specify a value type. In the code below, the "i" signifies that all elements in array_1 are integers:. Here is the code: import numpy as np def compare_neighbors (arr): ''' Checks if element (i,j) is different than (i-1,j), (i+1,j), (i,j-1), or (i,j+1). --Input-- arr: (2D np.array) array to compare all elements of --Returns-- comp_arr: (2D bool np.array) bool array with the resulting comparisons. True means the original element is the same as.

How to store user input data into 2D array. We can calculate how many elements a two dimensional array can have by using this formula: The array arr [n1] [n2] can have n1*n2 elements. The array that we have in the example below is having the dimensions 5 and 4. These dimensions are known as subscripts.