擅长:python、mysql、java
<p>如果将数据放在<code>collections.defaultdict</code>中,则不需要执行任何显式初始化。所有内容将在第一次使用时初始化。</p>
<pre class="lang-py prettyprint-override"><code>import numpy as np
import collections
n = 100
data = collections.defaultdict(lambda: np.zeros(n))
for i in range(1, n):
data['g'][i] = data['d'][i - 1]
# ...
</code></pre>