title: PIL Issue, OSError: cannot open resource
body: <p>I'm attempting to write a program that places text onto an image, I'm trying to get my head round PIL and have run into the error: OSError: cannot open resource. This is my first python program so apologies if the error is obvious.</p>
  
  <pre><code>from PIL import Image
  from PIL import ImageDraw
  from PIL import ImageFont
  
  
  im = Image.open("example.jpg")
  font_type = ImageFont.truetype("Arial.ttf", 18)
  draw = ImageDraw.Draw(im)
  draw.text(xy=(50, 50), text= "Text One", fill =(255,69,0), font = font_type)
  im.show()
  </code></pre>
  
  <p>I get the error:</p>
  
  <pre><code>Traceback (most recent call last):
  File "C:\Users\laurence.maskell\Desktop\attempt.py", line 7, in &lt;module&gt;
  font_type = ImageFont.truetype("Arial.ttf", 18)
  File "C:\Python34\lib\site-packages\PIL\ImageFont.py", line 259, in truetype
  return FreeTypeFont(font, size, index, encoding, layout_engine)
  File "C:\Python34\lib\site-packages\PIL\ImageFont.py", line 143, in __init__
  self.font = core.getfont(font, size, index, encoding, 
  layout_engine=layout_engine)
  OSError: cannot open resource
  </code></pre>