通过eval,我们可以动态地创建函数并在代码中调用它。以下是一个例子: defcreate_add_function(a,b):code=f'def add(x, y):\n return x + y\n\nresult = add({a},{b})'eval(code)returneval('result')add_result=create_add_function(2,3)print(add_
❮ Built-in Functions ExampleGet your own Python ServerEvaluate the expression 'print(55)':x = 'print(55)'eval(x) Try it Yourself » Definition and UsageThe eval() function evaluates the specified expression, if the expression is a legal Python statement, it will be executed.Syntax...
globals和locals:可选参数,用于指定全局和局部命名空间。 功能 eval函数用于将字符串作为代码执行。 它会去掉字符串最外侧的引号,并按照 Python 语句的方式执行去掉引号后的字符串。 示例 使用eval执行字符串表达式 s ='3.14 + 3'print(s,type(s))# 输出字符串类型a =eval(s)# 执行字符串表达式print(a,type(...
The first example compiles an expression foreval, which expects a single expression. The second compiles multiple statements forexec. Thesinglemode is for interactive use - it prints expression results like the Python REPL. Note the different return behaviors of each mode. Compiling from a File ...
Definition: eval(source: Union[Text, bytes, CodeType], globals: Optional[Dict[str, Any]]=..., locals: Optional[Mapping[str, Any]]=..., /) -> Any Evaluate the given source in the context of globals and locals. The source may be a string representing a Python expression or a code ...
Method/Function: function_eval导入包: helpers每个示例代码都附有代码来源和完整的源代码,希望对您的程序开发有帮助。示例1def jacobian(self, m): ieqcons = [] if len(self.config.params['controls']) == 2: # If the controls consists of the the friction and the positions, then we need to ...
The eval() function first calculated the expression ‘‘printTenNumbers + “()”’ to ‘printTenNumbers()’. After that printTenNumbers() is executed and the numbers are printed. Hence, we have converted a string to a function in python, Given that a function with the name of the given...
函数是python为了代码最大程度地重用和最小化代码冗余而提供的基本程序结构。函数是一种设计工具,它能让程序员将复杂的系统分解为可管理的部件; 函数用于将相关功能打包并参数化。在python中可以创建如下4种函数: 1)、全局函数:定义在模块中(直接定义在模块中的函数)。 2)、局部函数:嵌套于其它函数中(在函数中再...
2、Python开发工具安装。本人是vue\Java\python多种语言开发，所以使用了 IntelliJ IDEA开发工具。读者可以...
The Python compile() function is used to compile source code into a Python code object. Here, the Python code object represents a piece of bytecode that is executable and immutable.There are two methods named exec() and eval() are used along with the compile() function to execute the ...