[issue12296] Minor clarification in devguide

[Ezio Melotti]

Ezio Melotti <ezio.melotti at gmail.com> added the comment:

LGTM.

(Actually you can still break someone's code by introducing new functions/classes, in case they get imported with 'from mod import *' and override some local function/class with the same name -- but this is such an obscure case that doesn't deserve to be mentioned (and 'import *' is bad practice anyway).)

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nosy: +ezio.melotti

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