def test_compile_and_getsource_simple(self):

->     co = py.code.compile("x=3")

       exec co

       source = py.code.Source(co)

       assert str(source) == "x=3"

   def compile_(source, filename=None, mode='exec', flags=

               generators.compiler_flag, dont_inherit=0):

       """ compile the given source to a raw code object,

           which points back to the source code through

           "co_filename.__source__".  All code objects

           contained in the code object will recursively

           also have this special subclass-of-string

           filename.

       """

       s = Source(source)

->     co = s.compile(filename, mode, flags)

       return co