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_result) 1. 2. 3. 4. 5. 6. 7. 以上...
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(...
def custom_function(x): return x**2 + 2*x + 1 expression = "custom_function(3)" result = eval(expression, globals(), {'custom_function': custom_function}) print('The evaluated expression obtained is:',result) OutputThe result produced is as follows −The evaluated expression obtained ...
输出结果为:I am tom,the working of the computer 执行函数时也可以使用apply(function_name())的方式 总结: 在python语言中,定义(声明)函数时,使用def语句。 def function_name(arg1,...): func_suite 当程序遇到def时就会生成一个函数对象,并且这个函数对象被命名为func_name(该名称从某种角度上也可以理解...
❮ 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....
Python eval() function: The eval() function is used to evaluate the specified expression. If the expression is a correct Python statement, it will be executed.
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 ...
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...
Python is a high-level programming language that has become incredibly popular over the years because of how easy and adaptable it is to use. It is an easy-to-learn object-oriented language that allows dynamic typing. Numerous functions and methods that are already included in Python make devel...
问Python: python ast中的ast.FunctionType是什么？EN我不想假装已经理解了python ast中的所有东西，但是...