eval

I'm coding something like REPL Server. Request from users evaluates in such function: (defn execute [request] (str (try (eval (read-string request)) (catch Exception e (.getLocalizedMessage e))))) Each client in separate thread. But they have the same namespace. How can I run code in dynamic created namespace ? So when new client connected, I want to create new namespace and to run client handling loop code there. Or maybe it's possible to run (eval ..) in other namespace ? Thanks. upd. Solved! Execute function: (defn execute "evaluates s-forms" ([request] (execute request *ns*)) ([request

Can I convert a string to arguments list in python? def func(**args): for a in args: print a, args[a] func(a=2, b=3) # I want the following work like above code s='a=2, b=3' func(s) I know: list can, just use *list, but list can't have an element like: a=2 and eval can only evaluate expression which would be like: def func2(*args): for a in args: print a list1=[1,2,3] func2(*list1) func2(*eval('1,2,3')) You could massage the input string into a dictionary and then call your function with that, e.g. >>> x='a=2, b=3' >>> args = dict(e.split('=') for e in x.split(', ')) >>> f(**args) a 2 b 3 You

Google Chrome extensions using manifest_version: 2 are restricted from using eval or new Function . All of the JavaScript templating libraries I checked (mustachejs, underscorejs, jQuery template, hoganjs, etc) use new Function . Are there any that are fairly mature and supported that don't use either? Info about the security restrictions . It turns out that mustachejs added new Function recently and using tag 0.4.2 doesn't have it. It the API is slightly different with Mustache.to_html instead of Mustache.render and there are likely some performance reduction. I opened an issue to potentially

OK. I know the experts have spoken and you should not ever use python's eval() on untrusted data, ever. I'm not smarter than the rest of the world, and shouldn't even try this. But! I'm going to, anyhow. My basic problem is that I'm looking to write a little calculator evaluator program that'll take untrusted input, using a subset of python's syntax. I know: use ply or pyparsing and write a parser and there we go. Screwing around with passing globals and locals to eval() will not do the trick. All the approaches I've seen (and been leery about) try to enumerate evil. Here, I'm trying to

For code: #!/usr/bin/python src = """ print '!!!' import os """ obj = compile(src, '', 'exec') eval(obj, {'__builtins__': False}) I get output: !!! Traceback (most recent call last): File "./test.py", line 9, in <module> eval(obj, {'__builtins__': False}) File "", line 3, in <module> ImportError: __import__ not found Both 'print' and 'import' are language construct. Why does 'eval' restrict using of 'import' but doesn't restrict 'print'? P.S. I'm using python 2.6 UPDATE: Question is not "Why does import not work?" but "Why does print work?" Are there some architecture restrictions or something