call site 3 for code.Source.compile
code/testing/test_source.py - line 126
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   def test_compile_unicode(self): 
->     co = py.code.compile(unicode('u"\xc3\xa5"', 'utf8'), mode='eval')
       val = eval(co) 
       assert isinstance(val, unicode)
code/source.py - line 213
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   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