title: TypeError: 'str' object is not callable in Ipython console, but not externally
body: <p>Executing: </p>
  
  <pre><code>import numpy as np
  x = np.array([ 0.815,  0.02 , -0.053])
  " ".join(map(str, x))
  </code></pre>
  
  <p>in the IPython console gives me the error:</p>
  
  <pre><code>TypeError: 'str' object is not callable
  </code></pre>
  
  <p>But, when I execute this on a external system terminal, it works fine!</p>