[Assorted-commits] SF.net SVN: assorted: [686] python-commons/trunk/src/commons/seqs.py

[<yan...@us...>]

Revision: 686
          http://assorted.svn.sourceforge.net/assorted/?rev=686&view=rev
Author:   yangzhang
Date:     2008-04-28 17:31:41 -0700 (Mon, 28 Apr 2008)

Log Message:
-----------
addec countstep

Modified Paths:
--------------
    python-commons/trunk/src/commons/seqs.py

Modified: python-commons/trunk/src/commons/seqs.py
===================================================================
--- python-commons/trunk/src/commons/seqs.py	2008-04-25 21:38:05 UTC (rev 685)
+++ python-commons/trunk/src/commons/seqs.py	2008-04-29 00:31:41 UTC (rev 686)
@@ -341,6 +341,15 @@
             del chunk[ ( i + 1 ) % n : ]
             yield chunk
 
+def countstep(start, step):
+    """
+    Generate [start, start+step, start+2*step, start+3*step, ...].
+    """
+    i = start
+    while True:
+        yield i
+        i += step
+
 def take(n, seq):
     return list(islice(seq, n))
 


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