exec(object[,globals[,locals]])This function supports dynamic execution of Python code.objectmust be either a string or a code object. If it is a string, the string is parsed as a suite of Python statements whic
❮ Built-in Functions ExampleGet your own Python Server Execute a block of code: x = 'name = "John"\nprint(name)'exec(x) Try it Yourself » Definition and UsageThe exec() function executes the specified Python code.The exec() function accepts large blocks of code, unlike the eval...
code=""" defdynamic_function(x,y): returnx+y """ exec(code) result=dynamic_function(5,3) print(f"dynamic_function(5, 3)的结果是:{result}") 在这个示例中,exec函数动态地定义了一个名为dynamic_function的函数,并调用它返回结果8。 使用全局和局部命名空间 与eval类似,exec函数也可以接受两个可...
func_code = """ def dynamic_function(x, y): return x + y """ exec(func_code) result = dynamic_function(3, 4) print(result) # 输出 7 在上述示例中,动态创建了一个变量和一个函数,并成功使用它们。 动态创建类 exec函数还可以用于动态创建类。这可以在某些情况下非常有用,例如,当你需要在运...
This function supports dynamic execution of Python code.objectmust be either a string or a code object. If it is a string, the string is parsed as a suite of Python statements which is then executed (unless a syntax error occurs).[1] If it is a code object, it is simply executed. ...
[1] The exec statement in Python 2. https://docs.python.org/2.7/reference/simple_stmts.html#exec [2] The exec function in Python 3. https://docs.python.org/3/library/functions.html#exec [3] The eval function in Python. https://docs.python.org/3/library/functions.html#eval ...
>>>eval('(lambda fc=(lambda n: [c 1="c" 2="in" 3="().__class__.__bases__[0" language="for"][/c].__subclasses__() if c.__name__ == n][0]):fc("function")(fc("code")(0,0,0,0,"KABOOM",(),(),(),"","",0,""),{})())()',{"__builtins__":None})...
深度辨析 Python 的 eval() 与 exec() Python 提供了很多内置的工具函数(Built-in Functions),在最新的 Python 3 官方文档中,它列出了 69 个。 大部分函数是我们经常使用的,例如 print()、open() 与 dir(),而有一些函数虽然不常用,但它们在某些场景下,却能发挥出不一般的作用。内置函数们能够被“提拔”...
{'name': 'Python猫', 'age': 18} eval() 函数的返回值是其 expression 的执行结果,在某些情况下,它会是 None,例如当该表达式是 print() 语句,或者是列表的 append() 操作时,这类操作的结果是 None,因此 eval() 的返回值也会是 None。 >>> result = eval('[].append(2)') ...
2131520814344<class'dict'>{'__builtins__':<module'builtins'(built-in)>,'func':<functionfunc at0x000001F048C5E048>,'__doc__':None,'__file__':'C:/Users/wader/PycharmProjects/LearnPython/day04/func5.py','__loader__':<_frozen_importlib_external.SourceFileLoader object at0x000001F048...