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from package import Package
from reqPackage import ReqPackage
class DistPackage(Package):
"""Wrapper class for pkg_resources.Distribution instances
:param obj: pkg_resources.Distribution to wrap over
:param req: optional ReqPackage object to associate this
DistPackage with. This is useful for displaying the
tree in reverse
"""
def __init__(self, obj, req=None):
super(DistPackage, self).__init__(obj)
self.version_spec = None
self.req = req
def as_requirement(self):
"""Return a ReqPackage representation of this DistPackage"""
return ReqPackage(self._obj.as_requirement(), dist=self)
def as_required_by(self, req):
"""Return a DistPackage instance associated to a requirement
This association is necessary for displaying the tree in
reverse.
:param ReqPackage req: the requirement to associate with
:returns: DistPackage instance
"""
return self.__class__(self._obj, req)
def as_dict(self):
return {'key': self.key,
'package_name': self.project_name,
'installed_version': self.version}