numpy.isfinite() in Python

The numpy.isfinite() function tests element-wise whether it is finite or not(not infinity or not Not a Number) and return the result as a boolean array. Syntax : 

numpy.isfinite(array [, out])

Parameters : 

array : [array_like]Input array or object whose elements, we need to test for infinity out : [ndarray, optional]Output array placed with result. Its type is preserved and it must be of the right shape to hold the output.

Return : 

boolean array containing the result

Code 1 : 

# Python Program illustrating # numpy.isfinite() method import numpy as geek print("Finite : ", geek.isfinite(1), "\n") print("Finite : ", geek.isfinite(0), "\n") # not a number print("Finite : ", geek.isfinite(geek.nan), "\n") # infinity print("Finite : ", geek.isfinite(geek.inf), "\n") print("Finite : ", geek.isfinite(geek.NINF), "\n") 

Output : 

Finite : True Finite : True Finite : False Finite : False Finite : False 

Code 2 : 

# Python Program illustrating # numpy.isfinite() method import numpy as geek # Returns True/False value for each element  b = geek.arange(20).reshape(5, 4) print("\n",b) print("\nIs Finite : \n", geek.isfinite(b)) b = [[1j], [geek.inf]] print("\nIs Finite : \n", geek.isfinite(b)) 

Output : 

 [[ 0 1 2 3] [ 4 5 6 7] [ 8 9 10 11] [12 13 14 15] [16 17 18 19]] Is Finite : [[ True True True True] [ True True True True] [ True True True True] [ True True True True] [ True True True True]] Is Finite : [[ True] [False]]

Note : These codes won't run on online IDE's. So please, run them on your systems to explore the working.