On 25/06/14 16:20, candide wrote:
As explained by the docs, an assignment statement_evaluates_ the expression on the right hand side. So we can deduce that at the very beginning of the 2nd prompt, "the result of the last evaluation" is 43. Nevertheless, calling _ raises a NameError exception!
Only expression can be evaluated, statements are executed. The shell cannot see beyond the immediate statement.
The documentation for sys.displayhook() describes that None as a special case is neither printed nor stored in `__builtins__._`.
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