擅长:python、mysql、java
<p>只需使用<a href="https://docs.python.org/3/library/functions.html#complex" rel="nofollow noreferrer">^{<cd1>}</a>返回:</p>
<blockquote>
<p><code>real + imag*1j</code> or convert a string or number to a complex number</p>
</blockquote>
<pre><code>>>> a = complex(0,math.sqrt(4))
>>> a
2j
</code></pre>