Add unrelated but handy function: timegm(), to calculate Unix

timestamp from GMT tuple.

diff --git a/Lib/calendar.py b/Lib/calendar.py
index 8d5681a01856e5f4f5c58db428184df4b0d571c7..c9bc497fef31c5d53130dd53f2484801669e9bbf 100644 (file)
--- a/Lib/calendar.py
+++ b/Lib/calendar.py
@@ -151,3 +151,20 @@ def prcal(year):
                                        prweek(cal[i], 2)
                                print _spacing,
                        print
+
+# Unrelated but handy function to calculate Unix timestamp from GMT
+EPOCH = 1970
+def timegm(tuple):
+       year, month, day, hour, minute, second = tuple[:6]
+       assert year >= EPOCH
+       assert 1 <= month <= 12
+       days = 365*(year-EPOCH) + leapdays(EPOCH, year)
+       for i in range(1, month):
+               days = days + mdays[i]
+       if month > 2 and isleap(year):
+               days = days + 1
+       days = days + day - 1
+       hours = days*24 + hour
+       minutes = hours*60 + minute
+       seconds = minutes*60 + second
+       return seconds