python infinity

1positive_infinity = float('inf') 
2negative_infinity = float('-inf') 

1# Defining a positive infinite integer 
2positive_infnity = float('inf') 
3print('Positive Infinity: ', positive_infnity) 
4  
5# Defining a negative infinite integer 
6negative_infnity = float('-inf') 
7print('Negative Infinity: ', negative_infnity)

1test = float("inf")
2
3In Python 3.5, you can do:
4
5import math
6test = math.inf

1# Define Negative infinity number
2ntive_inf = float('-inf')
3print('Negative Infinity: ',ntive_inf)

1math.inf