Make subclasses of int, long, complex, float, and unicode perform type
conversion using the proper magic slot (e.g., __int__()). Also move conversion
code out of PyNumber_*() functions in the C API into the nb_* function.
Applied patch #1109424. Thanks Walter Doewald.
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index 4e8ffe5..103d1a3 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -545,6 +545,37 @@
self.assertEqual(float(unicode(" 3.14 ")), 3.14)
self.assertEqual(float(unicode(" \u0663.\u0661\u0664 ",'raw-unicode-escape')), 3.14)
+ def test_floatconversion(self):
+ # Make sure that calls to __float__() work properly
+ class Foo0:
+ def __float__(self):
+ return 42.
+
+ class Foo1(object):
+ def __float__(self):
+ return 42.
+
+ class Foo2(float):
+ def __float__(self):
+ return 42.
+
+ class Foo3(float):
+ def __new__(cls, value=0.):
+ return float.__new__(cls, 2*value)
+
+ def __float__(self):
+ return self
+
+ class Foo4(float):
+ def __float__(self):
+ return 42
+
+ self.assertAlmostEqual(float(Foo0()), 42.)
+ self.assertAlmostEqual(float(Foo1()), 42.)
+ self.assertAlmostEqual(float(Foo2()), 42.)
+ self.assertAlmostEqual(float(Foo3(21)), 42.)
+ self.assertRaises(TypeError, float, Foo4(42))
+
def test_getattr(self):
import sys
self.assert_(getattr(sys, 'stdout') is sys.stdout)
@@ -650,6 +681,39 @@
self.assertEqual(int('0123', 0), 83)
+ def test_intconversion(self):
+ # Test __int__()
+ class Foo0:
+ def __int__(self):
+ return 42
+
+ class Foo1(object):
+ def __int__(self):
+ return 42
+
+ class Foo2(int):
+ def __int__(self):
+ return 42
+
+ class Foo3(int):
+ def __int__(self):
+ return self
+
+ class Foo4(int):
+ def __int__(self):
+ return 42L
+
+ class Foo5(int):
+ def __int__(self):
+ return 42.
+
+ self.assertEqual(int(Foo0()), 42)
+ self.assertEqual(int(Foo1()), 42)
+ self.assertEqual(int(Foo2()), 42)
+ self.assertEqual(int(Foo3()), 0)
+ self.assertEqual(int(Foo4()), 42L)
+ self.assertRaises(TypeError, int, Foo5())
+
def test_intern(self):
self.assertRaises(TypeError, intern)
s = "never interned before"
@@ -810,6 +874,39 @@
self.assertRaises(ValueError, long, '53', 40)
self.assertRaises(TypeError, long, 1, 12)
+ def test_longconversion(self):
+ # Test __long__()
+ class Foo0:
+ def __long__(self):
+ return 42L
+
+ class Foo1(object):
+ def __long__(self):
+ return 42L
+
+ class Foo2(long):
+ def __long__(self):
+ return 42L
+
+ class Foo3(long):
+ def __long__(self):
+ return self
+
+ class Foo4(long):
+ def __long__(self):
+ return 42
+
+ class Foo5(long):
+ def __long__(self):
+ return 42.
+
+ self.assertEqual(long(Foo0()), 42L)
+ self.assertEqual(long(Foo1()), 42L)
+ self.assertEqual(long(Foo2()), 42L)
+ self.assertEqual(long(Foo3()), 0)
+ self.assertEqual(long(Foo4()), 42)
+ self.assertRaises(TypeError, long, Foo5())
+
def test_map(self):
self.assertEqual(
map(None, 'hello world'),