`Python` 标准库和 `Micropython` 标准微库
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.. toctree::
    :maxdepth: 1

    array.md
    ubinascii.md
    builtins.md
    cmath.md
    ucollections.md
    uerrno.md
    gc.md
    uhashlib.md
    uheapq.md
    uio.md
    ujson.md
    math.md
    uos.md
    urandom.md
    ure.md
    usocket.md
    ustruct.md
    sys.md
    utime.md
    uzlib.md
    _thread.md