python assert

, ... } Code that is similar to the detection method's entry is very common, but it is not a good idea to use manual detection logic in each method. Reading the spring source, you will find that spring uses a Org.springframework.util.Assert generic class to accomplish this task. assert translates to Chinese as "assertion", and readers who have used JUnit are familiar with this concept, which determines that an actual running value is the same a

# Define STR _ (x) x # define debug (format ,...) fprintf (stderr, "% s: % d:" str _ (Format) "\ n", _ file __, _ line __, ##__ va_args __) # define assert _ (expr _, extra_op) do {If (! (Expr _) {debug ("in the function '% s': asserted error:" # expr _, _ function _); \ extra_op; exit (-1) ;}}while (0) # define assert (expr) assert _ (expr ,) I don't like if

These days more busy looking at the previous project, found this spring under the Assert method, (previously used, but it seems to forget almost the * *)Org.springframework.util.Assert;The Assert assertion tool class, typically used for data legitimacy checks.It's usually written like this in the usual judgment.if (message== null | | message.equls ("")) {throw new IllegalArgumentException ("Incorrect input

Because assert (...); the function of a statement is to place a verification condition. Its function is different from that of a General function statement. If different function codes use the same indentation, the Code is not clearly read. For example: .... Assert (k> 0 ); Int col_num = This-> numcols (); Assert (col_num> 0 ); Int row_num = This-> numrows ();

This article mainly introduces node. console in js. this document describes how to use the assert method. assert method description, syntax, receive parameters, use instances, and implement Source Code. For more information, see Method description: This method is the same as assert. OK. If the expression evaluates to false, an AssertionError will be thrown al

ignored in the release version of the project. The use of TRACE macros ...TRACE macros are a bit like the printf function we used in C, which allows the program to output some debugging information during the run, so that we can understand some of the state of the program. But there's a difference:The TRACE macro is output only in the debug state, and the previously used printf function has output in all cases. Like the printf function, the

AssertRoleThe key place in the program can be asserted by asserting this macro. If the assertion is not true, the program stops and the standard error outputs a specific error message.However, in actual combat, the program stops directly is very bad phenomenon, so the assertion is only used in the debugging program.NDEBUG macroIn order to facilitate the use of assert in debugging, and when it is not necessary to easily stop the work of the

When assert is used for debugging, determine whether a statement is true.Assert is a macro, not a function. In the assert.h header file of C.The function of an assert is to evaluate the expression first, if its value is false (that is, 0), then it prints an error message to stderr and then terminates the program by calling abort.The disadvantage of using assert i

ASSERT () macro usageNote: Assert is a macro, not a function. In the assert.h header file of C.#inlcude Usage:void assert (int expression);The function of assert is to evaluate expression expression first, if its value is false (that is, 0), then it prints an error message to the standard error stream stderr, and then

The application method of the C ++ assert Macro will be described in this article.ArticleFor details I believe that friends who are interested in this should be able to fully master the application skills based on the content we introduced.As an experienced programmerProgramming LanguageThere should be no strangers. Its Applications can help us easily implement various functional requirements. Here we will give a detailed introduction to some basic

The Assert module provides simple assertion testing capabilities, primarily for internal use, and may be used externally after require (' assert '). The API for the assert module is locked state, which means that the API for this module will no longer be added or modified. assert Module Method list:

Assert. h 　The assert macro defines two expressions: # Define assert (exp )? (Void) 0: _ assert (msg )) # Define assert (exp) (void) (exp) | _ assert (msg )) Ctype. h 1. Development History: (If (0 Function-differentiated charact

Http://www.acm.uiuc.edu/webmonkeys/book/c_guide/2.1.html. Author: Eric Huss Chinese translator: Liu jinhong poechant Copyright Disclaimer: the original text in this article is copyrighted by Eric Huss, and the Chinese translation is copyrighted by poechant. Reprinted please indicate from "LIU Da's csdn blog": http://blog.csdn.net/poechant 1.1 assert. h The assertion header file is used for debugging. MACRO: Asser