psutil

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#!/usr/bin/env python3
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# Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""A clone of 'free' cmdline utility.
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$ python3 scripts/free.py
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             total       used       free     shared    buffers      cache
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Mem:      10125520    8625996    1499524          0     349500    3307836
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Swap:            0          0          0
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"""
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import psutil
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def main():
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    virt = psutil.virtual_memory()
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    swap = psutil.swap_memory()
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    templ = "%-7s %10s %10s %10s %10s %10s %10s"
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    print(templ % ('', 'total', 'used', 'free', 'shared', 'buffers', 'cache'))
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    sect = templ % (
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        'Mem:',
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        int(virt.total / 1024),
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        int(virt.used / 1024),
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        int(virt.free / 1024),
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        int(getattr(virt, 'shared', 0) / 1024),
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        int(getattr(virt, 'buffers', 0) / 1024),
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        int(getattr(virt, 'cached', 0) / 1024),
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    )
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    print(sect)
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    sect = templ % (
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        'Swap:',
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        int(swap.total / 1024),
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        int(swap.used / 1024),
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        int(swap.free / 1024),
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        '',
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        '',
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        '',
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    )
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    print(sect)
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if __name__ == '__main__':
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    main()
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