Python appending array to an array
<p>I am currently working on DES implementation.In one part of the code I have to append array to an array.Below is my code:  </p>

<pre><code>C0=[1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1]

def Fiestel():
    C=[]
    C.append(C0)
    temp=[0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1]
    C.append(temp)
    print(C)
Fiestel()
</code></pre>

<p>How do I append an array to an existing array.I even tried declaring C as 2d array.Thankx in advance for helping.</p>

<p>Each element is an array itself.</p>

<p><a href="https://i.stack.imgur.com/fYBDF.png" rel="noreferrer"><img src="https://i.stack.imgur.com/fYBDF.png" alt="enter image description here"></a></p>