Added connectivity check in iCalendar section

Calendar/E-Paper.py

@@ -91,6 +91,13 @@ def main():
                 ImageDraw.Draw(space).text((x, y), text, fill='black', font=font)
                 image.paste(space, tuple)
 
+            def internet_available():
+                try:
+                    urlopen('https://google.com',timeout=5)
+                    return True
+                except URLError as err:
+                    return False
+
             """Connect to Openweathermap API and fetch weather data"""
             if top_section is "Weather" and api_key != "" and owm.is_API_online() is True:
                 print("Connecting to Openweathermap API servers...")
@@ -278,7 +285,6 @@ def main():
             if middle_section is "Calendar" or "Agenda":
                 """Algorithm for filtering and sorting events from your
                 iCalendar/s"""
-                print('Fetching events from your calendar'+'\n')
                 events_this_month = []
                 upcoming = []
                 now = arrow.now()
@@ -288,6 +294,9 @@ def main():
                 to filter events in that range"""
                 agenda_max_days = arrow.now().replace(days=+22)
                 calendar_max_days = arrow.now().replace(days=+int(events_max_range))
+                if internet_available() is True:
+                    print('Internet connection test passed'+'\n')
+                    print('Fetching events from your calendar'+'\n')
                     for icalendars in ical_urls:
                         decode = str(urlopen(icalendars).read().decode())
                         beginAlarmIndex = 0
@@ -327,6 +336,11 @@ def main():
 
                     upcoming.sort(key=event_begins)
 
+                else:
+                    print("Could not fetch events from your iCalendar.")
+                    print("Either the internet connection is too slow or we're offline.")
+
+
                 if middle_section is 'Agenda':
                     """For the agenda view, create a list containing dates and events of the next 22 days"""
                     if len(upcoming) is not 0: