from numberc import *           # same test as main.cxx 
                                # use low-level C accessor function interface 
num = new_Number(1) 
Number_add(num, 4)              # pass C++ 'this' pointer explicitly
Number_display(num)             # use accessor functions in the C module
Number_sub(num, 2)
Number_display(num)

Number_data_set(num, 99)
print Number_data_get(num)
Number_display(num)
delete_Number(num)