title: TypeError: 'builtin_function_or_method' object is not subscriptable
body: <pre><code>elif( listb[0] == "-test"):
      run_all.set("testview")
      listb.pop[0]
  </code></pre>
  
  <blockquote>
    <p><strong>ERROR</strong>: Exception in Tkinter callback Traceback (most recent call
    last):   File
    "/tools/python/2.7.2/lib/python2.7/lib-tk/Tkinter.py", line 1410,
    in <strong>call</strong>
        return self.func(*args)   File "./edit.py", line 581, in populate
        listb.pop[0] TypeError: 'builtin_function_or_method' object is not subscriptable</p>
  </blockquote>
  
  <p>The line # 581 is represented by last pop statement in the code above.
  run_all is a StringVar.</p>
  
  <p>Why am I getting this error and how can it be solved?</p>