[Python-checkins] r75322 - python/trunk/Demo/scripts/beer.py

[georg.brandl]

Author: georg.brandl
Date: Sat Oct 10 23:47:31 2009
New Revision: 75322

Log:
Show use of range() step argument nicely.

Modified:
   python/trunk/Demo/scripts/beer.py

Modified: python/trunk/Demo/scripts/beer.py
==============================================================================
--- python/trunk/Demo/scripts/beer.py	(original)
+++ python/trunk/Demo/scripts/beer.py	Sat Oct 10 23:47:31 2009
@@ -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."