Fixed a bug in choice_box.py which crashed Python 3

Eliminated test_case "weather_man.py", because it had to connection to easygui
Fixed a Python3- incompatability in test_cases/file_open_box.py

easygui/boxes/choice_box.py

@@ -73,7 +73,7 @@ def make_list_or_none(obj, cast_type=None):
         if cast_type is not None:
             try:
                 ret_val = cast_type(obj)
-            except Exception, e:
+            except Exception as e:
                 raise Exception("Value {} cannot be converted to type: {}".format(obj, cast_type))
         ret_val = [ret_val,]
     # Convert all elements to cast_type

test_cases/SimpleCv.py

@@ -4,6 +4,7 @@
 from:
 http://stackoverflow.com/questions/27873818/easygui-and-simplecv-typeerror-module-object-is-not-callable
 
+Note: this module has a lot of dependencies: SimpleCV, OpenCV, PIL
 """
 import sys
 

test_cases/file_open_box.py

@@ -8,4 +8,4 @@
 sys.path.append('..')
 import easygui
 f = easygui.fileopenbox()
-print f
+print(f)

test_cases/gps_auto_update.py

@@ -7,9 +7,13 @@
 
 """
 
+import sys
+if sys.version_info.major > 2:
+    print("Sorry, the module gps is not included in Python 3") 
+    sys.exit()
+
 import gps
 from easygui import *
-import sys
 # Listen on port 2947 (gpsd) of localhost
 session = gps.gps("localhost", "2947")
 session.stream(gps.WATCH_ENABLE | gps.WATCH_NEWSTYLE)
@@ -37,4 +41,4 @@
           quit()
      except StopIteration:
           session = None
-          print "GPSD has terminated"
+          print("GPSD has terminated")