From cef24792e78313f678a665d0675ce8a748f1f72f Mon Sep 17 00:00:00 2001 From: Zooko O'Whielacronx Date: Tue, 4 Nov 2008 13:55:50 -0700 Subject: [PATCH] util: copy in nummedobj from pyutil --- src/allmydata/util/nummedobj.py | 48 +++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 src/allmydata/util/nummedobj.py diff --git a/src/allmydata/util/nummedobj.py b/src/allmydata/util/nummedobj.py new file mode 100644 index 00000000..e60505f8 --- /dev/null +++ b/src/allmydata/util/nummedobj.py @@ -0,0 +1,48 @@ +import dictutil + +class NummedObj(object): + """ + This is useful for nicer debug printouts. Instead of objects of the same class being + distinguished from one another by their memory address, they each get a unique number, which + can be read as "the first object of this class", "the second object of this class", etc. This + is especially useful because separate runs of a program will yield identical debug output, + (assuming that the objects get created in the same order in each run). This makes it possible + to diff outputs from separate runs to see what changed, without having to ignore a difference + on every line due to different memory addresses of objects. + """ + objnums = dictutil.NumDict() # key: class names, value: highest used object number + + def __init__(self, klass=None): + """ + @param klass: in which class are you counted? If default value of `None', then self.__class__ will be used. + """ + if klass is None: + klass = self.__class__ + self._classname = klass.__name__ + + NummedObj.objnums.inc(self._classname) + self._objid = NummedObj.objnums[self._classname] + + def __repr__(self): + return "<%s #%d>" % (self._classname, self._objid,) + + def __lt__(self, other): + return (self._objid, self._classname,) < (other._objid, other._classname,) + + def __le__(self, other): + return (self._objid, self._classname,) <= (other._objid, other._classname,) + + def __eq__(self, other): + return (self._objid, self._classname,) == (other._objid, other._classname,) + + def __ne__(self, other): + return (self._objid, self._classname,) != (other._objid, other._classname,) + + def __gt__(self, other): + return (self._objid, self._classname,) > (other._objid, other._classname,) + + def __ge__(self, other): + return (self._objid, self._classname,) >= (other._objid, other._classname,) + + def __hash__(self): + return id(self) -- 2.45.2