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digraph: implement __bool__
author
Zac Medico
<zmedico@gentoo.org>
Wed, 18 May 2011 01:43:32 +0000
(18:43 -0700)
committer
Zac Medico
<zmedico@gentoo.org>
Thu, 26 May 2011 03:11:27 +0000
(20:11 -0700)
pym/portage/util/digraph.py
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diff --git
a/pym/portage/util/digraph.py
b/pym/portage/util/digraph.py
index df024fb4b4f970808575a9559f527bdba72427bc..1bbe10f615e392cb389551c298f54867dd5f292e 100644
(file)
--- a/
pym/portage/util/digraph.py
+++ b/
pym/portage/util/digraph.py
@@
-1,9
+1,11
@@
-# Copyright 2010 Gentoo Foundation
+# Copyright 2010
-2011
Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
__all__ = ['digraph']
from collections import deque
# Distributed under the terms of the GNU General Public License v2
__all__ = ['digraph']
from collections import deque
+import sys
+
from portage import _unicode_decode
from portage.util import writemsg
from portage import _unicode_decode
from portage.util import writemsg
@@
-221,6
+223,9
@@
class digraph(object):
root_nodes.append(node)
return root_nodes
root_nodes.append(node)
return root_nodes
+ def __bool__(self):
+ return bool(self.nodes)
+
def is_empty(self):
"""Checks if the digraph is empty"""
return len(self.nodes) == 0
def is_empty(self):
"""Checks if the digraph is empty"""
return len(self.nodes) == 0
@@
-332,3
+337,6
@@
class digraph(object):
__contains__ = contains
empty = is_empty
copy = clone
__contains__ = contains
empty = is_empty
copy = clone
+
+ if sys.hexversion < 0x3000000:
+ __nonzero__ = __bool__