原版书书名：Programming Python, Fourth Edition
The animal on the cover of Programming Python is an African rock python, one of
approximately 18 species of python. Pythons are nonvenomous constrictor snakes that
live in tropical regions of Africa, Asia, Australia, and some Pacific Islands. Pythons live
mainly on the ground, but they are also excellent swimmers and climbers. Both male
and female pythons retain vestiges of their ancestral hind legs. The male python uses
these vestiges, or spurs, when courting a female.
The python kills its prey by suffocation. While the snake’s sharp teeth grip and hold
the prey in place, the python’s long body coils around its victim’s chest, constricting
tighter each time it breathes out. Pythons feed primarily on mammals and birds. Python
attacks on humans are extremely rare.