def collapse(self, expr):
        return self.expand(expr, ret_list=False)
Compute Content-Length or switch to chunked encoding if possible
dataset/ETHPy150Open linkedin/sysops-api/seco/range/__init__.py/Range.collapse--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/core/servers/basehttp.py/ServerHandler.set_content_length