Issue #1580: New free format floating point representation based on "Floating-Point Printer Sample Code", by Robert G. Burger. For example repr(11./5) now returns '2.2' instead of '2.2000000000000002'.
Thanks to noam for the patch! I had to modify doubledigits.c slightly to support X64 and IA64 machines on Windows. I also added the new file to the three project files.
diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py
index 4360c54..2ba6dbc 100644
--- a/Lib/test/test_float.py
+++ b/Lib/test/test_float.py
@@ -1,5 +1,6 @@
import unittest, struct
+import os
from test import test_support
class FormatFunctionsTestCase(unittest.TestCase):
@@ -146,12 +147,26 @@
self.assertRaises(ValueError, format, 3.0, "s")
+class ReprTestCase(unittest.TestCase):
+ def test_repr(self):
+ floats_file = open(os.path.join(os.path.split(__file__)[0],
+ 'floating_points.txt'))
+ for line in floats_file:
+ line = line.strip()
+ if not line or line.startswith('#'):
+ continue
+ v = eval(line)
+ self.assertEqual(v, eval(repr(v)))
+ floats_file.close()
+
+
def test_main():
test_support.run_unittest(
FormatFunctionsTestCase,
UnknownFormatTestCase,
IEEEFormatTestCase,
- FormatTestCase)
+ FormatTestCase,
+ ReprTestCase)
if __name__ == '__main__':
test_main()