Replace custom infinite iterator with itertools.count

schichtleiter/schedule.py

@@ -17,6 +17,7 @@
 from collections import namedtuple
 from datetime import *
 from icalendar import Calendar
+from itertools import count
 from xml.dom import Node
 from xml.dom.minidom import getDOMImplementation
 
@@ -102,12 +103,6 @@ def calendar_to_xml(cal):
 
         return e
 
-    def positive_integers():
-        i = 1
-        while True:
-            yield i
-            i += 1
-
     root(elem(
         'version',
         str(version),
@@ -120,7 +115,7 @@ def calendar_to_xml(cal):
     ))
 
     fmt = lambda dt: dt.isoformat(timespec='seconds')
-    id = positive_integers()
+    id = count(1)
     for index, day in enumerate(sorted(days.keys())):
         start, end, rooms = days[day]
         root(elem(