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        >>> print p.keys()
        ['majflt', 'rss', 'cnswap', 'cstime', 'pid', 'session', 'startstack', 'startcode', 'cmajflt', 'blocked', 'exit_signal', 'minflt', 'nswap', 'environ', 'priority', 'state', 'delayacct_blkio_ticks', 'policy', 'rt_priority', 'ppid', 'nice', 'cutime', 'endcode', 'wchan', 'num_threads', 'sigcatch', 'comm', 'stime', 'sigignore', 'tty_nr', 'kstkeip', 'utime', 'tpgid', 'itrealvalue', 'kstkesp', 'rlim', 'signal', 'pgrp', 'flags', 'starttime', 'cminflt', 'vsize', 'processor']

       And then access the various process properties using it as a dictionary:

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        systemd
        >>> print p['priority']
        20
        >>> print p['state']
        S

       Please refer to the 'procfs(5)' man page, by using:

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            PF_EXITING        Getting shut down
            PF_EXITPIDONE     Pi exit done on shut down
            PF_VCPU           I'm a virtual CPU
            PF_WQ_WORKER      I'm a workqueue worker
            PF_FORKNOEXEC     Forked but didn't exec
            PF_MCE_PROCESS    Process policy on mce errors
            PF_SUPERPRIV      Used super-user privileges
            PF_DUMPCORE       Dumped core
            PF_SIGNALED       Killed by a signal
            PF_MEMALLOC       Allocating memory
            PF_NPROC_EXCEEDED Set_user noticed that RLIMIT_NPROC was exceeded
            PF_USED_MATH      If unset the fpu must be initialized before use
            PF_USED_ASYNC     Used async_schedule*(), used by module init
            PF_NOFREEZE       This thread should not be frozen
            PF_FROZEN          Frozen for system suspend
            PF_FSTRANS         Inside a filesystem transaction
            PF_KSWAPD          I am kswapd
            PF_MEMALLOC_NOIO   Allocating memory without IO involved
            PF_LESS_THROTTLE   Throttle me less: I clean memory
            PF_KTHREAD         I am a kernel thread
            PF_RANDOMIZE       Randomize virtual address space
            PF_SWAPWRITE       Allowed to write to swap
            PF_NO_SETAFFINITY  Userland is not allowed to meddle with cpus_allowed
            PF_MCE_EARLY       Early kill for mce process policy
            PF_MUTEX_TESTER    Thread belongs to the rt mutex tester
            PF_FREEZER_SKIP    Freezer should not count it as freezable
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    One can obtain the available fields by asking for the keys of the
    dictionary, e.g.:

        >>> import procfs
        >>> p = procfs.pidstatus(1)
        >>> print p.keys()
        ['VmExe', 'CapBnd', 'NSpgid', 'Tgid', 'NSpid', 'VmSize', 'VmPMD', 'ShdPnd', 'State', 'Gid', 'nonvoluntary_ctxt_switches', 'SigIgn', 'VmStk', 'VmData', 'SigCgt', 'CapEff', 'VmPTE', 'Groups', 'NStgid', 'Threads', 'PPid', 'VmHWM', 'NSsid', 'VmSwap', 'Name', 'SigBlk', 'Mems_allowed_list', 'VmPeak', 'Ngid', 'VmLck', 'SigQ', 'VmPin', 'Mems_allowed', 'CapPrm', 'Seccomp', 'VmLib', 'Cpus_allowed', 'Uid', 'SigPnd', 'Pid', 'Cpus_allowed_list', 'TracerPid', 'CapInh', 'voluntary_ctxt_switches', 'VmRSS', 'FDSize']
        >>> print p["Pid"]
        1
        >>> print p["Threads"]
        1
        >>> print p["VmExe"]
        1248 kB
        >>> print p["Cpus_allowed"]
        f
        >>> print p["SigQ"]
        0/30698
        >>> print p["VmPeak"]
        320300 kB
        >>>

    Please refer to the 'procfs(5)' man page, by using:

        $ man 5 procfs

    To see information for each of the above fields, it is part of the
    'man-pages' RPM package.

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        >>> all_processes = procfs.pidstats()
        >>> firefox_pid = all_processes.find_by_name("firefox")
        >>> firefox_process = all_processes[firefox_pid[0]]
        >>> print firefox_process["environ"]["PWD"]
        /home/acme
        >>> print len(firefox_process.environ.keys())
        66
        >>> print firefox_process["environ"]["SHELL"]
        /bin/bash
        >>> print firefox_process["environ"]["USERNAME"]
        acme
        >>> print firefox_process["environ"]["HOME"]
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        /var/spool/mail/acme
        >>>
        rqz/environrrr�=rN)r)r@r rArBrE)r/rI�x�yr	r	r
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        perf python binding can be used to detect when new threads appear
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    with each interrupt.

    The information comes from the /proc/interrupts file, documented in
    'man procfs(5)', for instance, the 'cpu' dict is an array with one entry
    per CPU present in the system, each value being the number of interrupts
    that took place per CPU.

    E.g.:

    >>> import procfs
    >>> interrupts = procfs.interrupts()
    >>> thunderbolt_irq = interrupts.find_by_user("thunderbolt")
    >>> print thunderbolt_irq
    34
    >>> thunderbolt = interrupts[thunderbolt_irq]
    >>> print thunderbolt
    {'affinity': [0, 1, 2, 3], 'type': 'PCI-MSI', 'cpu': [3495, 0, 81, 0], 'users': ['thunderbolt']}
    >>>
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        >>> import procfs
        >>> interrupts = procfs.interrupts()
        >>> thunderbolt_irq = interrupts.find_by_user("thunderbolt")
        >>> print thunderbolt_irq
        34
        >>> thunderbolt = interrupts[thunderbolt_irq]
        >>> print thunderbolt
        {'affinity': [0, 1, 2, 3], 'type': 'PCI-MSI', 'cpu': [3495, 0, 81, 0], 'users': ['thunderbolt']}
        >>>
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        >>> import procfs
        >>> import re
        >>> interrupts = procfs.interrupts()
        >>> usb_controllers = interrupts.find_by_user_regex(re.compile(".*hcd"))
        >>> print usb_controllers
        ['22', '23', '31']
        >>> print [ interrupts[irq]["users"] for irq in usb_controllers ]
        [['ehci_hcd:usb4'], ['ehci_hcd:usb3'], ['xhci_hcd']]
        >>>
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    Useful to figure out if some kernel boolean knob has been turned on,
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    It can also be used to find out about parameters passed to the
    init process, such as 'BOOT_IMAGE', etc.

    E.g.:
    >>> import procfs
    >>> kcmd = procfs.cmdline()
    >>> print kcmd.keys()
    ['LANG', 'BOOT_IMAGE', 'quiet', 'rhgb', 'rd.lvm.lv', 'ro', 'root']
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          >>> print cpus.nr_cpus
          4

    It is also possible to figure out aspects of the CPU topology, such as
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      1

    Additionally dictionary with information common to all CPUs in the system
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