title: PIL Opening JPEG Missing Photoshop
body: <p>I'm opening a jpg file with Pillow/PillowPIL. But am getting a missing photoshop error. </p>
  
  <p>The environment is a portable python WinPython-64bit-2.7.13.1Zero base installation, plus the Pillow-PIL and some other packages installed. </p>
  
  <pre><code>&gt;&gt;&gt; from PIL import Image
  &gt;&gt;&gt; Image.open("snap_thm_0.jpg")
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "C:\Users\you\Desktop\penvgui\lib\site-packages\PIL\Image.py", line 2690, in open
      im = _open_core(fp, filename, prefix)
    File "C:\Users\you\Desktop\penvgui\lib\site-packages\PIL\Image.py", line 2676, in _open_core
      im = factory(fp, filename)
    File "C:\Users\you\Desktop\penvgui\lib\site-packages\PIL\JpegImagePlugin.py", line 783, in jpeg_factory
      im = JpegImageFile(fp, filename)
    File "C:\Users\you\Desktop\penvgui\lib\site-packages\PIL\ImageFile.py", line 103, in __init__
      self._open()
    File "C:\Users\you\Desktop\penvgui\lib\site-packages\PIL\JpegImagePlugin.py", line 373, in _open
      handler(self, i)
    File "C:\Users\you\Desktop\penvgui\lib\site-packages\PIL\JpegImagePlugin.py", line 139, in APP
      self.info["photoshop"] = photoshop
  UnboundLocalError: local variable 'photoshop' referenced before assignment
  &gt;&gt;&gt;
  </code></pre>
  
  <p>Any other packages will be needed to resolve this issue? Thanks.</p>