Evaluate a string
- To: mathgroup at smc.vnet.net
- Subject: [mg25129] Evaluate a string
- From: Phlip <phlip_cpp at my-deja.com>
- Date: Sun, 10 Sep 2000 03:14:49 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Newsgroupies: The inner problem. In Perl, for example, you can evaluate a string back in thru the Perl parser: my x = 0; eval "x = 3"; assert (x == 3); I have a string containing Mathematica language code. How do I evaluate it as a Mathematica statement? Taking the code out of the string is not an option. (But I could conceivably write the string to a file, and then Load or Run this. But I can't find a Mathematica command to load a file and execute it.) The outer problem: I'm trying to turn Mathematica into a server, using Python's PYML package. This cleverly wraps up all the Mathematica language primitives into Python primitives, so you _don't_ need to evaluate strings; you just add and subtract Python objects. I don't want that; I just need glue that takes in the string from some client, warms up MathLink, submits the string, and gets the results off the drive. To do this the MathLink way, I need to use MLEvaluateString(). But this is not a real MathLink function (!?). It's code you get automagically generated using the Mathematica Template preprocessor. I can't use that, because PYML already has a ML.c, which is a finished, working program that does not use the preprocessor. I don't want to rewrite it or retrofit it. If I try to copy-n-paste MLEvaluateString from a template-based project, it suffers runaway dependencies. Where is the optimal path thru all this to some simple environmental features that all other languages have??? -- Phlip ======= http://users.deltanet.com/~tegan/home.html ======= Sent via Deja.com http://www.deja.com/ Before you buy.