a, b = 1, 2

# Using the "-" operator:
b - a                  # = 1

import operator        # contains 2 argument arithmetic functions
operator.sub(b, a)     # = 1

Possible combinations (builtin types):

• int and int (gives an int)
• int and float (gives a float)
• int and complex (gives a complex)
• float and float (gives a float)
• float and complex (gives a complex)
• complex and complex (gives a complex)