examples/numbers/operators.py
from __future__ import print_function, division

a = 2
b = 3
c = 2.3

print(a+b)   # 5
print(a+c)   # 4.3
print(b/a)   # 1.5    # see the __future__
print(a*c)   # 4.6

a += 7       # is the same as a = a + 7
print(a)     # 9

# a++        # SyntaxError: invalid syntax

There is no autoincrement (++) and autodecrement (--) in Python, because they can be expressed by += 1 and -= 1 respectively.