#A4#
#Python
Interpreter#
##
##
##
##
#Heap#
##
##
##
#Stack#
#10#
#20#
#Before BINARY_ADD#
#Python
Interpreter#
##
##
##
##
#Heap#
##
##
##
#Stack#
#10#
#20#
#After BINARY_ADD#
##
#30#
#Stack contains to elements.
Each pointing to an integer
object in heap#
#Two elements were popped off.
The integer objects were added,
a new integer object was created.
Pointer to new object is pushed.#