title: simulation problem due to the library import
body: <p>I found a problem in the python program.I don't know what I have to do.
  Cordially.</p>
  
  <pre><code>import pyautogui
  im1 = pyautogui.screenshot()
  im2 = pyautogui.screenshot('my_screenshot.png')
  
  
  Traceback (most recent call last):
    File "C:/Users/LENOVO/Desktop/yyyu.py", line 1, in &lt;module&gt;
      import pyautogui
    File "C:\Python27\lib\site-packages\pyautogui\__init__.py", line 84, in &lt;module&gt;
      import pyscreeze
  SyntaxError: 'return' with argument inside generator (__init__.py, line 168)
  </code></pre>