Fix exportvcalendar error is "is not" with a literal (Python 3.8 issue) (#1135)

Fixes #12000
2021-02-19 11:31:06 -06:00 · 2021-02-19 11:31:06 -06:00 · f6bfb46fc0
commit f6bfb46fc0
parent b6fa5da8ee
1 changed files with 1 additions and 1 deletions
--- a/gramps/plugins/export/exportvcalendar.py
+++ b/gramps/plugins/export/exportvcalendar.py
@ -202,7 +202,7 @@ class CalendarWriter:
        date = event.get_date_object()
        place_handle = event.get_place_handle()
        date_string = self.format_date(date, 1)
-        if date_string is not "":
+        if date_string != "":
            # self.writeln("")
            self.writeln("BEGIN:VEVENT")
            time_s = time.gmtime(event.change)