def self.builtins
@builtins ||= %w(
__import__ abs all any apply basestring bin bool buffer
bytearray bytes callable chr classmethod cmp coerce compile
complex delattr dict dir divmod enumerate eval execfile exit
file filter float frozenset getattr globals hasattr hash hex id
input int intern isinstance issubclass iter len list locals
long map max min next object oct open ord pow property range
raw_input reduce reload repr reversed round set setattr slice
sorted staticmethod str sum super tuple type unichr unicode
vars xrange zip
)
end