$ perl -e '
print "9 + 16 = ", add(9, 16), "\n";
print "9 - 16 = ", subtract(9, 16), "\n";
use Inline Python => <<"END_OF_PYTHON_CODE";
def add(x,y):
    return x + y

def subtract(x,y):
    return x - y

END_OF_PYTHON_CODE
'

__output__
9 + 16 = 25
9 - 16 = -7