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-rw-r--r--Objects/floatobject.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index e77b2dc..2ef4d1a 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -1533,7 +1533,9 @@ float_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
return float_subtype_new(type, args, kwds); /* Wimp out */
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:float", kwlist, &x))
return NULL;
- if (PyUnicode_Check(x))
+ /* If it's a string, but not a string subclass, use
+ PyFloat_FromString. */
+ if (PyUnicode_CheckExact(x))
return PyFloat_FromString(x);
return PyNumber_Float(x);
}