擅长:python、mysql、java
<p><a href="https://docs.python.org/3.3/library/functions.html#zip" rel="nofollow noreferrer">^{<cd1>}</a>您的朋友在这里:</p>
<pre><code>a = ['a', 'e', 'y']
b = [3, 2, 1]
c = []
for x, y in zip(a, b):
c.extend([x] * y)
print(c)
# ['a', 'a', 'a', 'e', 'e', 'y']
</code></pre>
<p>或使用<a href="https://docs.python.org/3/library/itertools.html#itertools.chain.from_iterable" rel="nofollow noreferrer">^{<cd2>}</a>:</p>
^{pr2}$