from glob import glob

 @contextlib.contextmanager

 def pushd(newDir):

     previousDir = os.getcwd()

     finally:

         os.chdir(previousDir)

 class DependencyException(Exception):

     pass

 def deptree(sources, deps=None):

     if deps is None:

         deps = []

         else:

             deferred.append(name)

     return deps

 def main(args):

     with pushd('etc/backup.d'):

         with open("backup.yml") as f:

                     data = yaml.load(f)

                     if "depends" in data:

                         for i in range(0, len(data["depends"])):

                     sources[path] = data

         source = config["sources"][name]

         print(json.dumps(source, indent=2))

 if __name__ == '__main__':

     try:

         main(sys.argv[1:])