title: 'numpy.ndarray' object is not callable error in python
body: <p>I was converting LU decomposition matlab code into python.</p>
  
  <p>But while I was doing it I encountered with this error </p>
  
  <blockquote>
    <p><code>'numpy.ndarray' object is not callable</code></p>
  </blockquote>
  
  <p>this error occurs when I tried to test my code. Here is my code and can anyone help with this problem?? I'm waiting for your help.</p>
  
  <pre><code>import numpy as np
  
  def LU(a):
      [m,m]=a.shape
  
      for k in range(0,m-1,1):
          a[k+1:m-1,k]=a[k+1:m-1,k]/a(k,k)
          a[k+1:m-1,k+1:m-1]=a[k+1:m-1,k+1:m-1]-a[k+1:m-1,k]*a[k,k+1:m-1]
      L=np.eye(m,m)+np.tril(a,-1)
      U=np.triu(a)
      return [L,U]
  
  b=np.array([[1,0,0],[0,1,0],[0,0,1]])
  
  LU(b)
  </code></pre>