From 4452ca879e18163efde8e07e2e506bb3ce4131dc Mon Sep 17 00:00:00 2001
From: Jeremy Fincher <jemfinch@users.sourceforge.net>
Date: Sun, 11 Jan 2004 14:33:38 +0000
Subject: [PATCH] Added functions for reading non-comment or empty lines of a
 file.

---
 src/utils.py       | 15 +++++++++++++++
 test/test_utils.py |  9 +++++++++
 2 files changed, 24 insertions(+)

diff --git a/src/utils.py b/src/utils.py
index 68e8251c9..15c5f4d78 100755
--- a/src/utils.py
+++ b/src/utils.py
@@ -511,6 +511,21 @@ class IterableMap(object):
         return False
 
 
+def nonCommentLines(fd):
+    for line in fd:
+        if not line.startswith('#'):
+            yield line
+
+def nonEmptyLines(fd):
+##     for line in fd:
+##         if line.strip():
+##             yield line
+    return ifilter(str.strip, fd)
+
+def nonCommentNonEmptyLines(fd):
+    return nonEmptyLines(nonCommentLines(fd))
+
+
 if __name__ == '__main__':
     import sys, doctest
     doctest.testmod(sys.modules['__main__'])
diff --git a/test/test_utils.py b/test/test_utils.py
index 508615175..aa7afefad 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -311,6 +311,15 @@ class UtilsTest(unittest.TestCase):
         for s in ['lambda: 2', 'import foo', 'foo.bar']:
             self.assertRaises(ValueError, utils.safeEval, s)
 
+    def testLines(self):
+        L = ['foo', 'bar', '#baz', '  ', 'biff']
+        self.assertEqual(list(utils.nonEmptyLines(L)),
+                         ['foo', 'bar', '#baz', 'biff'])
+        self.assertEqual(list(utils.nonCommentLines(L)),
+                         ['foo', 'bar', '  ', 'biff'])
+        self.assertEqual(list(utils.nonCommentNonEmptyLines(L)),
+                         ['foo', 'bar', 'biff'])
+