utils/const.py Removed extra characters
These characters could be removed.
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		@@ -6,7 +6,7 @@
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import copy
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					import copy
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class ConstProxy():
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					class ConstProxy:
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    """Implements read-only access to a given object
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					    """Implements read-only access to a given object
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    that can be attached to each instance only once."""
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					    that can be attached to each instance only once."""
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@@ -20,15 +20,15 @@ class ConstProxy():
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        return copy.deepcopy(getattr(src, name))
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					        return copy.deepcopy(getattr(src, name))
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    def __setattr__(self, name, value):
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					    def __setattr__(self, name, value):
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        raise AttributeError("tried to set '%s' to '%s' for constant object" % \
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					        raise AttributeError("tried to set '%s' to '%s' for constant object" %
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                             (name, value))
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					                             (name, value))
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    def __delattr__(self, name):
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					    def __delattr__(self, name):
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        raise RuntimeError("tried to delete field '%s' from constant object" % \
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					        raise RuntimeError("tried to delete field '%s' from constant object" %
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                           (name))
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					                           name)
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    def set_source(self, source):
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					    def set_source(self, source):
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        """ Sets source object for this instance. """
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					        """ Sets source object for this instance. """
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        if (self.__dict__['__source'] is not None):
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					        if self.__dict__['__source'] is not None:
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            raise ValueError("source object is already set")
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					            raise ValueError("source object is already set")
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        self.__dict__['__source'] = source
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					        self.__dict__['__source'] = source
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