Python closing test

testopen.py

from contextlib import closing

class File(object):
    def __init__(self, filename):
        self.filename = filename
        print('Created object for %s' % self.filename)

    def open(self):
        print('Opening %s' % self.filename)

    def close(self):
        print('Closing %s' % self.filename)

def myopen(filename):
    f = File(filename)
    f.open()
    return closing(f)

if __name__ == '__main__':

    filename = 'file.txt'
    print('***********Using as context manager')
    with myopen(filename) as f:
        print(type(f))

    print()
    print('***********Using as a function')
    f = myopen(filename)
    print(type(f))

    print('***********Cannot call open')                                        
    f.open()

related to stackoverflow question:

http://stackoverflow.com/questions/8070259/how-to-use-python-closing-context-manager