Fix a delimiter detection problem in sniffer. Sniffing "a|b|c\r\n" was

returning 'a' as the delimiter.  It now returns '|', but not because I
understood better what the code was supposed to do.  Would someone that
understands the idea behind _guess_delimiter() (see its doc string) look to
see if my fallback choice is better than before or if it's just serendipity
that I picked the proper delimiter?

1 files changed, 7 insertions, 0 deletions

diff --git a/Lib/test/test_csv.py b/Lib/test/test_csv.py
index 0ad77ef..8511a5a 100644
--- a/Lib/test/test_csv.py
+++ b/Lib/test/test_csv.py
@@ -852,6 +852,8 @@ Stonecutters Seafood and Chop House, Lemont, IL, 12/19/02, Week Back
 '''
 
     sample5 = "aaa\tbbb\r\nAAA\t\r\nBBB\t\r\n"
+    sample6 = "a|b|c\r\nd|e|f\r\n"
+    sample7 = "'a'|'b'|'c'\r\n'd'|e|f\r\n"
 
     def test_has_header(self):
         sniffer = csv.Sniffer()
@@ -882,6 +884,11 @@ Stonecutters Seafood and Chop House, Lemont, IL, 12/19/02, Week Back
         self.assertEqual(dialect.delimiter, ";")
         dialect = sniffer.sniff(self.sample5)
         self.assertEqual(dialect.delimiter, "\t")
+        dialect = sniffer.sniff(self.sample6)
+        self.assertEqual(dialect.delimiter, "|")
+        dialect = sniffer.sniff(self.sample7)
+        self.assertEqual(dialect.delimiter, "|")
+        self.assertEqual(dialect.quotechar, "'")
 
 if not hasattr(sys, "gettotalrefcount"):
     if test_support.verbose: print "*** skipping leakage tests ***"