擅长:python、mysql、java
<pre><code>class Foo():
def __init__(self, val):
self.val = val
lFoo = [Foo(i) for i in range(1000)]
%timeit [f.val for f in lFoo]
10000 loops, best of 3: 52.5 µs per loop
%timeit list(map(lambda f: f.val, lFoo))
10000 loops, best of 3: 114 μs per loop
</code></pre>