python assert

Assert is a new feature introduced in j2se1.4. assertion is a Boolean State included in the Code. Programmers think this state is true. Generally, assert checks program security during development and generally does not use assert during release. Added support for the assert keyword and Java. Lang. asserterror class in

methods for using the Assert function under Linux systems. The steps are as follows: The stereotype of an Assert macro is defined in "Assert.h", which terminates the execution of a program if its condition returns an error, and the prototype defines: #include "Assert.h" void assert (int expression); The function of

efficient performance analysis and optimization of statements. This series of articles is expected to contain the following operators: Assert: Assert (the name of the English version of the graphical interface, the Chinese version of the execution plan in XML format, and the name of the execution plan in text format. Same below Concatenation: concatenation Compute scalar: Compute scalar

I. assert is a macro Specifically: in C, ASSERT is a macro rather than a function.Assert () is a macro that is often used when debugging programs. When the program is running, it calculates the expressions in parentheses. If the expression is FALSE (0), the program reports an error and terminates the execution. If the expression is not 0, execute the following statement. This macro is often used to determin

the Assert keyword for Java trapsI. OverviewIn the C and C + + languages, there are assert keys, which represent assertions. In Java, there is also an ASSERT keyword, which means that assertions are similar in usage and meaning.second, the grammarIn Java, the Assert keyword was introduced from Java SE 1.4, in order to

Usage of assertion (assert)Reprinted from Http://www.cnblogs.com/moondark/archive/2012/03/12/2392315.htmlI always thought that assert is just an error function, in fact, it is actually a macro, and the role is not "error."After a certain understanding of its role and use of a certain understanding of the use of assert () is like a "contractual programming", in my

The assert () macro is used to ensure that a specific condition is met. The usage is:Assert (expression );If the expression value is false, the entire program exits and an error message is output. If If the value is true, continue to execute the following statement.Before using this macro, the header file assert. h must be included.For example# Include # Include Void main (){Float a, B;Scan ("% F", A, B )

URL: http://www.cnblogs.com/archimedes/p/c-library-assert.html.1. Background Knowledge The only purpose of the header file You can write the code as follows: #include Of course, the above Code is not the best form in practice. The exceptional termination of the program should be changed to the recovery of some errors. Macro NDEBUG You can define the macro NDEBUG in some places of the program to change the assert expansion mode. If NDEBUG is not defin

C + + assert () assertion mechanismASSERT () is a macro that is used frequently when a debugger is run, and it evaluates expressions in parentheses when the program runs, and if the expression is False (0),The program will report an error and terminate execution. If the expression is not 0, the following statement continues. This macro usually turns out that there is clearly illegal data in the program, and if a termination procedure is used to avoid

The MSDN text says: Evaluates an expression and if the result is false, prints a diagnostic message and aborts the program. (Judging an expression, if the result is false, output a diagnostic message and abort the program.) ） void assert ( int expression ); Parameters: expression (including pointers) that evaluates to nonzero or 0. (expression "including pointer" is not 0 or 0) Principle: The function of a