There are some examples but often this is crowded out. A new user might be proud to have discovered the dot notation for methods, and then get a nasty surprise, like

     for p in range(1,50) :
        if (p.is_prime()) :
           print p

from #1678.

Anyway, in various places this would be a good idea - especially various tutorials and intros to programming.

Component: documentation

Issue created by migration from https://trac.sagemath.org/ticket/17373