basic.py 文件源码

def _unsafe_writes(self, src, dest):
        # sadly there are some situations where we cannot ensure atomicity, but only if
        # the user insists and we get the appropriate error we update the file unsafely
        try:
            try:
                out_dest = open(dest, 'wb')
                in_src = open(src, 'rb')
                shutil.copyfileobj(in_src, out_dest)
            finally:  # assuring closed files in 2.4 compatible way
                if out_dest:
                    out_dest.close()
                if in_src:
                    in_src.close()
        except (shutil.Error, OSError, IOError) as e:
            self.fail_json(msg='Could not write data to file (%s) from (%s): %s' % (dest, src, to_native(e)),
                           exception=traceback.format_exc())