title: TypeError: input() takes 2 positional arguments but 3 were given
body: <p>I'm trying to learn basics of python and there is this <code>input()</code> command in eric6 and the command and the error is this:</p>
  
  <pre><code>size  = int(input('size: '))
  Traceback (innermost last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "C:\Users\Asus\AppData\Local\Programs\Python\Python35\Lib\site-packages\eric6\DebugClients\Python\DebugClientBase.py", line 74, in DebugClientInput
      return DebugClientInstance.input(prompt, echo)
  TypeError: input() takes 2 positional arguments but 3 were given
  </code></pre>