ensure get_started() works on all os

downloadversionIRdata.py

@@ -61,11 +61,24 @@ def get_started():
     it opens a weblink to a presentation and as well a flow chart
     """
     print("Welcome")
-    import webbrowser
-    webbrowser.open('https://wikis.ipp-hgw.mpg.de/PhysicsW7X/images/9/9f/2019-04-24_20190424_How_to_access_Infrared_Data.pdf', new=2)
+    link = "https://wikis.ipp-hgw.mpg.de/PhysicsW7X/images/9/9f/2019-04-24_20190424_How_to_access_Infrared_Data.pdf"
     path=str(repr(__file__)).split("downloadversionIRdata")[0].split("'")[1]
-    os.startfile(path+"IR_data_access_flow_chart.png")
-    
+    image = path + "IR_data_access_flow_chart.png"
+    try:
+        import webbrowser
+        webbrowser.open(link, new=2)
+        try:
+            os.startfile(image)
+        except AttributeError:
+            # Non-windows os:
+            webbrowser.open(image)
+    except Exception:
+        # When ever that fails, just print the links:
+        print("Some slides can be found in the wiki:")
+        print(link)
+        print("And a flow-chart for getting and using the data can be found here:")
+        print(image)
+
 
 def get_latest_version(stream, project="W7X", testmode=False, t_from=None,
                        t_to=None, program=None, verbose=0):