def __iter__(self):
        return iter(self.readline, "")
Copy file from src to dst.
dataset/ETHPy150Open babble/babble/include/jython/Lib/mailbox.py/_ProxyFile.__iter__--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/ext/cloudstorage/cloudstorage_stub.py/CloudStorageStub.put_copy