Eval, Exec, Safeguarding in python

gistfile1.txt

# from:  http://effbot.org/zone/librarybook-core-eval.htm

print eval("__import__('os').remove('file')", {"__builtins__": {}})  # in particular, one has to kill or safeguard __import__

# PyRun_SimpleStringFlags
https://github.com/python-git/python/blob/715a6e5035bb21ac49382772076ec4c630d6e960/Modules/main.c#L284
https://github.com/python-git/python/blob/715a6e5035bb21ac49382772076ec4c630d6e960/Python/pythonrun.c#L949
https://github.com/python-git/python/blob/715a6e5035bb21ac49382772076ec4c630d6e960/Python/pythonrun.c#L1286


# is this enough?  
exec compile(ast.parse("print 1"),'<string>','exec')


https://docs.python.org/2/c-api/veryhigh.html

# http://lucumr.pocoo.org/2011/2/1/exec-in-python/
exec compile(ast.parse("""print a; print 1
for k in range(5):
    print 'abcdefg'[k]
"""),'string','exec')


# execute in new namespace?  
>>> code = compile('a = 1 + 2', '<string>', 'exec')
>>> ns = {}
>>> exec code in ns
>>> print ns['a']
3