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Home/ Questions/Q 203003
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Editorial Team
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Editorial Team
Asked: May 11, 20262026-05-11T17:20:24+00:00 2026-05-11T17:20:24+00:00

In Python, how big can a list get? I need a list of about

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In Python, how big can a list get? I need a list of about 12000 elements. Will I still be able to run list methods such as sorting, etc?

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  1. Editorial Team
    Editorial Team
    2026-05-11T17:20:24+00:00Added an answer on May 11, 2026 at 5:20 pm

    According to the source code, the maximum size of a list is PY_SSIZE_T_MAX/sizeof(PyObject*).

    PY_SSIZE_T_MAX is defined in pyport.h to be ((size_t) -1)>>1

    On a regular 32bit system, this is (4294967295 / 2) / 4 or 536870912.

    Therefore the maximum size of a python list on a 32 bit system is 536,870,912 elements.

    As long as the number of elements you have is equal or below this, all list functions should operate correctly.

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