Prepend element to numpy array : <p>I have the following numpy array</p>

<pre><code>import numpy as np

X = np.array([[5.], [4.], [3.], [2.], [1.]])
</code></pre>

<p>I want to insert <code>[6.]</code> at the beginning.
I've tried:</p>

<pre><code>X = X.insert(X, 0)
</code></pre>

<p>how do I insert into X?</p>
