这句python代码的意思就是找tuple的class,再找它的基类,也就是object,再通过object找他的子类,具体的子类也如代码中的输出一样。从中可以看到了有file模块,zipimporter模块,是不是可以利用下呢?首先从file入手 假如用户如果构造: 1 2 3 4 5 6 7 8 9 10 11 12 >>> s1 = """ ... [ ... c for...
>>> 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...
This function can also be used to execute arbitrary code objects (such as those created bycompile()). In this case pass a code object instead of a string. If the code object has been compiled with'exec'as themodeargument,eval()‘s return value will beNone. Hints: dynamic execution of ...
这个是个大function，不过里面comment都很简洁有用，起码可以很快理解这个是如何structure的一、概述在Pytho...
eval是Python用于执行python表达式的一个内置函数,使用eval,可以很方便的将字符串动态执行。比如下列代码: #!python >>> eval("1+2") 3 >>> eval("[x for x in range(10)]") [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] 复制代码 1.
The eval() function evaluates the specified expression, if the expression is a legal Python statement, it will be executed.Syntaxeval(expression, globals, locals) Parameter ValuesParameterDescription expression A String, that will be evaluated as Python code globals Optional. A dictionary containing ...
``object_hook`` is an optional function that will be called with the result of any object literal decode (a ``dict``). The return value of ``object_hook`` will be used instead of the ``dict``. This feature can be used to implement custom decoders (e.g. JSON-RPC class hinting)...
Seeast.literal_eval()for a function that can safely evaluate strings with expressions containing only literals. 下面我做一下简单的翻译,有可能有一些翻译不好的地方,见谅。 函数原型: eval(expression,globals=None,locals=None) 参数: expression:这个参数是一个字符串,python会使用globals字典和locals字典作为...
help(eval)help(input)help(int)可查看这几个python内置函数的帮助：Help on built-in function eval ...
When you call eval() with a string as an argument, the function returns the value that results from evaluating the input string. By default, eval() has access to global names like x in the above example.To evaluate a string-based expression, Python’s eval() runs the following steps:...