Christian Heimes <li...@cheimes.de> added the comment:

I'm strong -1 on any kind of arbitrary memory limit. Python is used on all 
sorts of hardware from RPi to super computers. 1 TB sounds like a lot, but it 
really is not. These days you can buy workstation computers with more than 1 TB 
RAM.

I would be ok with a limit of 2**48 on X86_64 platforms. Current X86_64 CPUs 
have a virtual address size limit of 48 bits. Other hardware platforms may have 
a similar limit. I don't have access to AArch64 or PPC64 to verify the address 
size.

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39584>
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