[Python-Dev] Is implicit underscore assignment buggy? (original) (raw)

Fredrik Lundh fredrik at pythonware.com
Thu Jun 8 00:04:27 CEST 2006

Raymond Hettinger wrote:

When the result of an expression is None, the interactive interpreter correctly suppresses the display of the result. However, it also suppresses the underscore assignment. I'm not sure if that is correct or desirable because a subsequent statement has no way of knowing whether the underscore assignment is current or whether it represents an earlier non-None result.

why would a subsequent statement need to know that ? are you sure you didn't mean "user" instead of "subsequent statement" ?

for users, it's actually quite simple to figure out what's in the _ variable: it's the most recently printed result. if you cannot see it, it's not in there.

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