python - Timeit 模块 - 将参数传递给 python timeit 模块

Question

我想从 python timeit 模块检查打印以下内容需要多少时间，如何打印，

import timeit
x = [x for x in range(10000)]
timeit.timeit("print x[9999]")
d=[{i:i} for i in x]
timeit.timeit("print d[9999]")

NameError: global name 'x' is not defined
NameError: global name 'd' is not defined

Answer 1

根据 the docs :

To give the timeit module access to functions you define, you can pass a setup parameter which contains an import statement

在您的情况下，例如:

timeit.timeit('print d[9999]', 
              setup='from __main__ import d')