Use our reraising when probing for pyglet

gym/envs/classic_control/rendering.py

@@ -8,21 +8,18 @@
         os.environ['DYLD_FALLBACK_LIBRARY_PATH'] += ':/usr/lib'
         # (JDS 2016/04/15): avoid bug on Anaconda 2.3.0 / Yosemite
 
+from gym.utils import reraise
 from gym import error
 
 try:
     import pyglet
 except ImportError as e:
-    raise error.DependencyNotInstalled("""{}
-
-(HINT: you can install pyglet directly via 'pip install pyglet'. But if you really just want to install all Gym dependencies and not have to think about it, 'pip install -e .[all]' or 'pip install gym[all]' will do it.)""".format(e))
+    reraise(suffix="HINT: you can install pyglet directly via 'pip install pyglet'. But if you really just want to install all Gym dependencies and not have to think about it, 'pip install -e .[all]' or 'pip install gym[all]' will do it.")
 
 try:
     from pyglet.gl import *
 except ImportError as e:
-    raise error.DependencyNotInstalled("""{} (while running: from pyglet.gl import *).
-
-(HINT: make sure you have OpenGL install. On Ubuntu, you can run 'apt-get install python-opengl'. If you're running on a server, you may need a virtual frame buffer; something like this should work: 'xvfb-run -s "-screen 0 1400x900x24" <your script here>')""".format(e))
+    reraise(prefix="Error occured while running `from pyglet.gl import *`",suffix="HINT: make sure you have OpenGL install. On Ubuntu, you can run 'apt-get install python-opengl'. If you're running on a server, you may need a virtual frame buffer; something like this should work: 'xvfb-run -s \"-screen 0 1400x900x24\" python <your_script.py>'")
 
 import math
 import numpy as np