Merged revisions 75322 via svnmerge from

birkenfeld · birkenfeld · commit 4630c09351ec · 2009-10-10T21:49:24.000Z
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r75322 | georg.brandl | 2009-10-10 23:47:31 +0200 (Sa, 10 Okt 2009) | 1 line

  Show use of range() step argument nicely.
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diff --git a/Demo/scripts/beer.py b/Demo/scripts/beer.py
@@ -1,14 +1,20 @@
 #! /usr/bin/env python
+
 # By GvR, demystified after a version by Fredrik Lundh.
+
 import sys
+
 n = 100
-if sys.argv[1:]: n = int(sys.argv[1])
+if sys.argv[1:]:
+    n = int(sys.argv[1])
+
 def bottle(n):
     if n == 0: return "no more bottles of beer"
     if n == 1: return "one bottle of beer"
     return str(n) + " bottles of beer"
-for i in range(n):
-    print(bottle(n-i), "on the wall,")
-    print(bottle(n-i) + ".")
+
+for i in range(n, 0, -1):
+    print(bottle(i), "on the wall,")
+    print(bottle(i) + ".")
     print("Take one down, pass it around,")
-    print(bottle(n-i-1), "on the wall.")
+    print(bottle(i-1), "on the wall.")
