擅长:python、mysql、java
<p>如果检查内存中每种数据类型的大小,则得到:</p>
<pre><code>import numpy as np
dt = np.dtype('object')
print('object = %i bytes' % dt.itemsize)
dt = np.dtype('U6')
print('U6 = %i bytes' % dt.itemsize)
</code></pre>
<p>输出:</p>
<pre><code>object = 8 bytes
U6 = 24 bytes
</code></pre>