>>> eval("__import__('os').system('uname')", {'__builtins__':{}}) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<string>", line 1, in <module> NameError: name '__import__' is not defined ...
nameerror: name '__import__' is not defined 现在就是提示__import__未定义,不能成功执行了,看情况是安全了吧?答案当然是错的。 比如执行如下: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 >>> s = """ ... (lambda fc=( ... lambda n: [ ... c for c in ... ().__cl...
'UnicodeEncodeError', 'UnicodeError', 'UnicodeTranslateError', 'UnicodeWarning', 'UserWarning', 'ValueError', 'Warning', 'ZeroDivisionError', '_', 'debug', 'doc', 'import', 'name', 'package', 'abs', 'all', 'any', 'apply', 'basestring', 'bin', 'bool', 'buffer', 'bytearray', '...
NameError: name 'abs' is not defined 看情况这下是安全了,但是还是可以绕过的:1 2 >>> ().__class__.__bases__[0].__subclasses__() [<type 'type'>, <type 'weakref'>, <type 'weakcallableproxy'>, <type 'weakproxy'>, <type 'int'>, <type 'basestring'>, <type 'bytearray'>, ...
执行的结果为:NameError: name ‘abck’ is not defined 对于当面的代码,我们可以看到,字符串s并不满足表达式的要求。当eval剥去了”abck”的外面的引号的时候,它会对它进行解析,然后满足要求后进行计算,然后它解析到的是abcd,请注意,程序报出的错误是NameError,也就是说,当它解析到这个表达式是不可以计算后,...
NameError: name 'os' is not defined >>> 1. 2. 3. 4. 5. 6. 7. 其实这样仍然非常不安全,我们仍然可以借助内置的函数__import__()来导入标准库,比如eval("__import__('os').system('ls')", {}) >>> eval("__import__('os').system('ls')", {}) ...
If only globals is given, locals defaults to it. """ pass 作用: eval() 函数用来执行一个字符串表达式,并返回表达式的值。 示例: 代码语言:python 代码运行次数:0 运行 AI代码解释 # -*- coding:utf-8 -*- import json json_str = '{"token":"dasgdhasdas", "status":0, "data":{"name":...
const str = "{name:'zxc',age:18}" new Function('return' + str)() // {name: 'zxc',age: 18} 看下几点区别: // 转化json字符串 new Function('return' + '{}')() // {} // 转化array字符串 new Function('return' + '[1, 2]')() // [1, 2] // 转化function字符串 new Func...
parse_int=None, parse_constant=None, object_pairs_hook=None, **kw):"""Deserialize ``s`` (a ``str``, ``bytes`` or ``bytearray`` instance containing a JSON document) to a Python object. ``object_hook`` is an optional function that will be called with the ...
If ``indent`` is a non-negative integer, then JSON array elements and object members will be pretty-printed with that indent level. An indent level of 0 will only insert newlines. ``None`` is the most compact representation. If specified, ``separators`` should be an ``(item_separator,...