Il y a justement une discussion sur ce sujet (l'utilisation de Python par google) sur la liste de Unladen Swallow. La conclusion est simple et sans fioriture : google aime bien python mais il y a plein de tâches pour lequel il n'est pas du tout adapté.
Par un des auteurs de Unladen Swallow :
Well, simple common sense is going to limit Python's applicability when operating at Google's scale: it's not as fast as Java or C++, threading sucks, memory usage is higher, etc. One of the design constraints we face when designing any new system is, what happens when the load goes up by 10x or 100x? What happens if the whole planet thinks your new service is awesome? Any technology that makes satisfying that constraint harder -- and I think Python falls into this category -- *should* be discouraged if it doesn't have a very strong case made in its favor on other merits.
[^] # Re: Python et Google
Posté par Philippe F (site web personnel) . En réponse à la dépêche Go : Un nouveau langage chez Google. Évalué à 6.
Par un des auteurs de Unladen Swallow :
Well, simple common sense is going to limit Python's applicability when operating at Google's scale: it's not as fast as Java or C++, threading sucks, memory usage is higher, etc. One of the design constraints we face when designing any new system is, what happens when the load goes up by 10x or 100x? What happens if the whole planet thinks your new service is awesome? Any technology that makes satisfying that constraint harder -- and I think Python falls into this category -- *should* be discouraged if it doesn't have a very strong case made in its favor on other merits.