<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def stream(self, chunk_size=64*1024):
        'Returns a generator to iterate over the file contents'
        #return self.jfs.stream(url='%s?mode=bin' % self.path, chunk_size=chunk_size)
        return self.jfs.stream(url=self.path, params={'mode':'bin'}, chunk_size=chunk_size)