sandboxing/running python code line by line

Question

I\'d love to be able to do something like these two are doing:

Inventing on principle @18:20 , Live ClojureScript Game Editor

If you don\'t wanna check the v

Answer 1

For simple tracing I suggest you use pdb. I've found it's quite reasonable for most debugging/single stepping purposes. For your example:

import pdb
...
xs = []
pdb.set_trace()
for x in xrange(10):
    xs.append(x)

Now your program will stop at the set_trace() call and you can use n or s to step through your code while it's executing. AFAIK pdb is using bdb as its backend.