The rexec module, shown in Example 14-6, provides versions of exec,
eval, and import, which
execute code in a restricted execution environment. In this
environment, functions that can damage resources on the local machine
are no longer available.
Example 14-6. Using the rexec Module
File: rexec-example-1.py
import rexec
r = rexec.RExec()
print r.r_eval("1+2+3")
print r.r_eval("_ _import_ _('os').remove('file')")
6
Traceback (innermost last):
File "rexec-example-1.py", line 5, in ?
print r.r_eval("_ _import_ _('os').remove('file')")
File "/usr/local/lib/python1.5/rexec.py", line 257, in r_eval
return eval(code, m._ _dict_ _)
File "<string>", line 0, in ?
AttributeError: remove..................Content has been hidden....................
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