# 导入整个模块
import pizza
# 导入特定函数
from pizza import make_pizza
# 使用as给函数指定别名
from pizza import make_pizza as mp
# 使用as给模块指定别名
import pizza as p
# 导入模块中所有函数
from pizza import *

pizza.make_pizza(16, 'green peppers', 'mushrooms')
make_pizza(16, 'green peppers', 'mushrooms')
mp(16, 'green peppers', 'mushrooms')
p.make_pizza(16, 'green peppers', 'mushrooms')