Frank Millman frank at chagford.com
Fri Oct 21 03:43:32 EDT 2016

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"Anssi Saari"  wrote in message news:vg3wph2i3dt.fsf at coffee.modeemi.fi...

> OK, so what happens is that now t references the dictionary with
{'a': {}} and r references the empty dict inside that. So when we assign to 
r
again, it's the empty dict inside t (the one accessed by key 'a') that
changes to {'b': {}} and t becomes {'a': {'b': {}}}.

Yup, you have got it :-)

Frank

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