title: TypeError: unsupported operand type(s) for /: 'list' and 'int'
body: <p>I got the below error: </p>
  
  <blockquote>
    <p>unsupported operand type(s) for /: 'list' and 'int' </p>
  </blockquote>
  
  <p>How do I solve this problem? Any idea? </p>
  
  <p>Here is my code:</p>
  
  <pre><code>def func(xdata_1,cc,dd,gg):
      return cc*(xdata_1**(dd))*
             (10**(-1.572*gg*( (185/((xdata_1/420)**2 + (420/xdata_1)**2 + 90 )) )
  
  params,pcov = curve_fit(func,xdata_1,ydata_1,
                          sigma=err_1, absolute_sigma=True)
  
  fc_1 = func(xdata_1, *params)
  </code></pre>