From 0c0cfbcab9d2d3802a40239a12b5e2c90435a940 Mon Sep 17 00:00:00 2001
From: Jeffrey Tratner <jeffrey.tratner@gmail.com>
Date: Sun, 28 Jul 2013 00:07:39 -0400
Subject: [PATCH] CLN: Add __bool__ alias for __nonzero__

Python3 uses __bool__, not __nonzero__
---
 pandas/core/generic.py   | 3 +++
 pandas/core/internals.py | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index 0cf9a066e11bd..d7fc4ce21ca87 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -651,6 +651,9 @@ def empty(self):
     def __nonzero__(self):
         return not self.empty
 
+    # Python 3 compat
+    __bool__ = __nonzero__
+
     @property
     def ndim(self):
         return self._data.ndim
diff --git a/pandas/core/internals.py b/pandas/core/internals.py
index e2b3131fac9ce..21cfa8658b03c 100644
--- a/pandas/core/internals.py
+++ b/pandas/core/internals.py
@@ -1016,6 +1016,9 @@ def make_empty(self):
     def __nonzero__(self):
         return True
 
+    # Python3 compat
+    __bool__ = __nonzero__
+
     @property
     def ndim(self):
         return len(self.axes)