Eval function try to execute and interpret the string (argument) passed to it as python code. x=1 print (eval ('x+1')) Output of the above code will be 2.

Nov 22, 2014 · eval() will allow malicious data to compromise your entire system, kill your cat, eat your dog and make love to your wife. There was recently a thread about how to do this kind of …

Feb 8, 2010 · I've been looking at dynamic evaluation of Python code, and come across the eval() and compile() functions, and the exec statement. Can someone please explain the difference …

Aug 18, 2010 · If you're satisfied with plain expressions using elementary-type literals only, use ast.literal_eval -- that's what it's for! For anything fancier, I recommend a parsing package, …

ast.literal_eval is safer than eval, but it's not actually safe. As recent versions of the docs explain: "Warning It is possible to crash the Python interpreter with a sufficiently large/complex string …

Safely evaluate an expression node or a string containing a Python expression. The string or node provided may only consist of the following Python literal structures: strings, numbers, tuples, …

With Python backend, your expression is evaluated similar to just passing the expression to Python's eval function. You have the flexibility of doing more inside expressions, such as string …

Some other examples where literal_eval or json.loads fails but asteval works. If you have the string representation of numpy objects and if numpy is installed on your system, then it's much …

Apr 8, 2011 · By the way, there are many ways to avoid using exec / eval if all you need is a dynamic name to assign, e.g. you could use a dictionary, the setattr function, or the locals() …

173 ast.literal_eval() only considers a small subset of Python's syntax to be valid: The string or node provided may only consist of the following Python literal structures: strings, bytes, …