惰性求值

当 Python 按顺序执行下面的脚本时，打印出消息 'Converting to percentage' 时会执行到哪一行？

from dask import delayed

def fraction_to_percent(x):
     percentage = x * 100
     print('Converting to percentage')
     return x

frac = 0.3
percentage = delayed(fraction_to_percent)(frac)
computed_percentage = percentage.compute()

print(percentage)
print(computed_percentage)

您可以使用控制台来帮助判断答案。会话中已提供 fraction_to_percent() 函数。