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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 names(self):
 """Returns a list of possible completions for the symbol under the cursor in the current user context."""

        #This is where the context information is extremely useful in 
        #limiting the extent of the search space we need to examine.
        if self._names is None:
            attribute = self.get_attribute()
            if self.context.module is not None:
                symbol = self.context.symbol
                fullsymbol = self.context.full_symbol
                self._names = self._complete_el(symbol, attribute, fullsymbol)
            else:
                self._names = []

        return self._names