Diamond output in python

num = eval (input ( 'Enter up * line number:')) 
A = NUM 
B = NUM 
# Triangular 
for I in Range (. 1, NUM +. 1): 
    Print ((A-. 1) * '', (2 * I-. 1) * '*') 
    A - =. 1 
# lower triangular 
for J in Range (. 1, NUM): 
    Print (J * '', (2 * B-. 3) * '*') 
    B - = 1