Managing Google AppEngine datastore maintenance

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def requires_datastore_write(view):
    def newview(request, *args, **kwargs):
        from google.appengine.api import capabilities
        datastore_write_enabled = capabilities.CapabilitySet('datastore_v3', capabilities=['write']).is_enabled()
        
        if datastore_write_enabled:
            return view(request, *args, **kwargs)
        else:
            from django.shortcuts import render_to_response
            from django.template import RequestContext
            return render_to_response('maintenance.html', context_instance=RequestContext(request))
        
    return newview

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