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authorRichard Purdie <richard.purdie@linuxfoundation.org>2011-05-07 08:49:28 +0100
committerRichard Purdie <richard.purdie@linuxfoundation.org>2011-05-07 08:49:28 +0100
commit506241c914383c20561144069ba0b0d3850ce8cc (patch)
treec9cdad2c80916378236fde989464558a2bd853b1 /bitbake/lib/bb
parent0788081ac7a04f94c349b2673ed6ae122aa7d1a8 (diff)
downloadpoky-506241c914383c20561144069ba0b0d3850ce8cc.tar.gz
bitbake: Add missing file
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'bitbake/lib/bb')
-rw-r--r--bitbake/lib/bb/compat.py28
1 files changed, 28 insertions, 0 deletions
diff --git a/bitbake/lib/bb/compat.py b/bitbake/lib/bb/compat.py
new file mode 100644
index 0000000000..c6978fccc5
--- /dev/null
+++ b/bitbake/lib/bb/compat.py
@@ -0,0 +1,28 @@
1"""Code pulled from future python versions, here for compatibility"""
2
3def total_ordering(cls):
4 """Class decorator that fills in missing ordering methods"""
5 convert = {
6 '__lt__': [('__gt__', lambda self, other: other < self),
7 ('__le__', lambda self, other: not other < self),
8 ('__ge__', lambda self, other: not self < other)],
9 '__le__': [('__ge__', lambda self, other: other <= self),
10 ('__lt__', lambda self, other: not other <= self),
11 ('__gt__', lambda self, other: not self <= other)],
12 '__gt__': [('__lt__', lambda self, other: other > self),
13 ('__ge__', lambda self, other: not other > self),
14 ('__le__', lambda self, other: not self > other)],
15 '__ge__': [('__le__', lambda self, other: other >= self),
16 ('__gt__', lambda self, other: not other >= self),
17 ('__lt__', lambda self, other: not self >= other)]
18 }
19 roots = set(dir(cls)) & set(convert)
20 if not roots:
21 raise ValueError('must define at least one ordering operation: < > <= >=')
22 root = max(roots) # prefer __lt__ to __le__ to __gt__ to __ge__
23 for opname, opfunc in convert[root]:
24 if opname not in roots:
25 opfunc.__name__ = opname
26 opfunc.__doc__ = getattr(int, opname).__doc__
27 setattr(cls, opname, opfunc)
28 return cls