Why Copy Post Data In Django Instead Of Working With It Directly?

Django code samples involving post data often shows code similar to this: if request.method == 'POST': post = request.POST.copy() #do stuff with post data Is there a reason

Solution 1:

I think it is because request.POST itself is defined immutable. If you want a version you can actually change (mutability), you need a copy of the data to work with.

See this link (request.POST is a QueryDict instance).

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class QueryDict

QueryDict instances are immutable, unless you create a copy() of them. That means you can’t change attributes of request.POST and request.GET directly.