'Cookies are NOT loaded from the named file until either the .load() or
.revert() method is called.'

def __init__(self, filename=None, delayload=False, policy=None):

    CookieJar.__init__(self, policy)
    if (filename is not None):
        try:
            (filename + '')
        except:
            raise ValueError('filename    must    be    string-like')
    self.filename = filename
    self.delayload = bool(delayload)
