If you’ve used other programming languages, you may have learned that an empty object is not the same as an object that does not exist. In this lesson, you’ll learn how to check for None (or Null objects) in Python. foo =Noneiffoo is None: print("is None")iffoo ==None: print...
zeros, zeros_like 类似于ones和ones_like,但生成的是全为 0 的数组 empty, empty_like 通过分配新内存创建新数组,但不像ones和zeros那样填充任何值 full, full_like 生成具有给定形状和数据类型的数组,所有值都设置为指定的“填充值”;full_like接受另一个数组,并生成相同形状和数据类型的填充数组 | eye, ide...
The primary issue is that the pipe handles may be inherited by one or more descendant processes (e.g. via shell=True), which are all regarded as potential writers that keep the pipe from closing. Reading from an open pipe that's empty will block until data becomes available. This is...
* XLR_SPECIAL_REL_UPDATE and XLR_CHECK_CONSISTENCY bits can be passed by * XLogInsert caller. The rest are set internally by XLogInsert. */ #define XLR_INFO_MASK0x0F #define XLR_RMGR_INFO_MASK0xF0 /* * If a WAL record modifies any relation files, in ways not covered by the * us...
(self, actions): """ Returns the cost of a particular sequence of actions. If those actions include an illegal move, return 999999. """ if actions == None: return 999999 x,y= self.getStartState() cost = 0 for action in actions: # Check figure out the next state and see whether ...
if condition_1: statement_1 elif condition_2: statement_2 ... elif condition_i: statement_i else: statement_n 整个条件语句是顺序执行的,如果遇到一个条件满足,比如condition_i满足时,在执行完statement_i后,便会退出整个if、elif、else条件语句,而不会继续向下执行。这个语句在工作中很常用,比如下面的...
{ ApolloConfigStatusCodeException statusCodeException = ex; //config not found if (ex.getStatusCode() == 404) { String message = String.format( "Could not find config for namespace - appId: %s, cluster: %s, namespace: %s, " + "please check whether the configs are released in Apollo...
"WEAKEA") if scheme in ['tftp', 'ftp'] or install_weak is not None: ret = get_feature_status("WEAKEA") if ret == OK: ret, _, rsp_data = ops_conn.create(uri, req_data) result = check_weakea_schedule(operation_type='install-feature-software') if ops_return_result(ret) or ...
del_recycle_bin() devices_res_space = get_residual_space(all_devices_paths) ret = check_devices_space(devices_res_space, need_space) if ret == OK: print_ztp_log("Empty recycle bin, the space enough and continue ztp...", LOG_INFO_TYPE) return OK devices_files_list = get_mpus_...
Use (void) for empty function parameters #8002 [@Yay295] Return early from BoxBlur if either width or height is zero #8347 [@radarhere] Check text is either string or bytes #8308 [@radarhere] Added writing XMP bytes to JPEG #8286 [@radarhere] Require font parameter in FreeTypeFont and...