Keep the pylint wolf at bay (#430)

* Fix bug, update ducumantation

* Clean up error messages

* Exit on error, fix bug

* One more bug fix

* Update documentation, fix code

l_sku can never match a_sku.lower() because it has -'s stripped and
a_sku doesn't

* Keep the pylint wolf at bay

* Clean up code, avoid try/except

src/gam.py

@@ -22,9 +22,6 @@ With GAM you can programatically create users, turn on/off services for users li
 For more information, see http://git.io/gam
 """
 
-from var import *
-import utils
-
 import sys
 import os
 import string
@@ -51,6 +48,9 @@ import oauth2client.service_account
 import oauth2client.file
 import oauth2client.tools
 
+import utils
+from var import *
+
 # Override some oauth2client.tools strings saving us a few GAM-specific mods to oauth2client
 oauth2client.tools._FAILED_START_MESSAGE = """
 Failed to start a local webserver listening on either port 8080
@@ -7710,11 +7710,8 @@ def doGetUserInfo(user_email=None):
       print '  %s' % _skuIdToDisplayName(user_license)
 
 def _skuIdToDisplayName(skuId):
-  try:
-    return SKUS[skuId][u'displayName']
-  except KeyError:
-    return skuId
- 
+  return SKUS[skuId][u'displayName'] if skuId in SKUS else skuId
+
 def doGetGroupInfo(group_name=None):
   cd = buildGAPIObject(u'directory')
   gs = buildGAPIObject(u'groupssettings')