# Re-assigning mutable objects
int_a = 10
print type(int_a), id(int_a)
# <type 'int'> 16577968
int_aa = int_a
print type(int_aa), id(int_aa)
# <type 'int'> 16577968
print int_aa is int_a
# True
int_aa = 20
print int_a, int_aa
# 10 20