class FileUpperSimple(object):
    def __init__(self,fname):
        self.fname=fname
        self.__f=None

    def read (self):
        return self.__f.read().upper()

    def __enter__(self):
        self.__f=open)self.fname)
        return self

    def __exit__ (self,exc_type,exc_val, exc_tb):
        self.__f.close()
        return False