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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def defvars(self):
 """generator on all definition of variable"""

    for f in self.body:
        if (hasattr(f, '_ctype')
                and f._name != ''
                and not isinstance(f._ctype, FuncType)
                and f._ctype._storage != Storages.TYPEDEF):
            yield f