(self, interval=None)
Return a float representing the current process CPU
        utilization as a percentage.

        When interval is 0.0 or None (default) compares process times
        to system CPU times elapsed since last call, returning
        immediately (non-blocking). That means that the first time
        this is called it will return a meaningful 0.0 value.

        When interval is > 0.0 compares process times to system CPU
        times elapsed before and after the interval (blocking).

        In this case is recommended for accuracy that this function
        be called with at least 0.1 seconds between calls.

        Examples:

          >>> import psutil
          >>> p = psutil.Process(os.getpid())
          >>> # blocking
          >>> p.cpu_percent(interval=1)
          2.0
          >>> # non-blocking (percentage since last call)
          >>> p.cpu_percent(interval=None)
          2.9
          >>>
Return a float representing the current process CPU
        utilization as a percentage.
Return a float representing the current process CPU utilization as a percentage .
def cpu_percent(self, interval=None):
        """Return a float representing the current process CPU
        utilization as a percentage.

        When interval is 0.0 or None (default) compares process times
        to system CPU times elapsed since last call, returning
        immediately (non-blocking). That means that the first time
        this is called it will return a meaningful 0.0 value.

        When interval is > 0.0 compares process times to system CPU
        times elapsed before and after the interval (blocking).

        In this case is recommended for accuracy that this function
        be called with at least 0.1 seconds between calls.

        Examples:

          >>> import psutil
          >>> p = psutil.Process(os.getpid())
          >>> # blocking
          >>> p.cpu_percent(interval=1)
          2.0
          >>> # non-blocking (percentage since last call)
          >>> p.cpu_percent(interval=None)
          2.9
          >>>
        """
        blocking = interval is not None and interval > 0.0
        num_cpus = cpu_count()
        if _POSIX:
            timer = lambda: _timer() * num_cpus
        else:
            timer = lambda: sum(cpu_times())
        if blocking:
            st1 = timer()
            pt1 = self._proc.cpu_times()
            time.sleep(interval)
            st2 = timer()
            pt2 = self._proc.cpu_times()
        else:
            st1 = self._last_sys_cpu_times
            pt1 = self._last_proc_cpu_times
            st2 = timer()
            pt2 = self._proc.cpu_times()
            if st1 is None or pt1 is None:
                self._last_sys_cpu_times = st2
                self._last_proc_cpu_times = pt2
                return 0.0

        delta_proc = (pt2.user - pt1.user) + (pt2.system - pt1.system)
        delta_time = st2 - st1
        # reset values for next call in case of interval == None
        self._last_sys_cpu_times = st2
        self._last_proc_cpu_times = pt2

        try:
            # The utilization split between all CPUs.
            # Note: a percentage > 100 is legitimate as it can result
            # from a process with multiple threads running on different
            # CPU cores, see:
            # http://stackoverflow.com/questions/1032357
            # https://github.com/giampaolo/psutil/issues/474
            overall_percent = ((delta_proc / delta_time) * 100) * num_cpus
        except ZeroDivisionError:
            # interval was too low
            return 0.0
        else:
            return round(overall_percent, 1)
def cpu_percent ( self , interval = None ) : blocking = interval is not None and interval > 0.0 num_cpus = cpu_count ( ) if _POSIX : timer = lambda : _timer ( ) * num_cpus else : timer = lambda : sum ( cpu_times ( ) ) if blocking : st1 = timer ( ) pt1 = self . _proc . cpu_times ( ) time . sleep ( interval ) st2 = timer ( ) pt2 = self . _proc . cpu_times ( ) else : st1 = self . _last_sys_cpu_times pt1 = self . _last_proc_cpu_times st2 = timer ( ) pt2 = self . _proc . cpu_times ( ) if st1 is None or pt1 is None : self . _last_sys_cpu_times = st2 self . _last_proc_cpu_times = pt2 return 0.0 delta_proc = ( pt2 . user - pt1 . user ) + ( pt2 . system - pt1 . system ) delta_time = st2 - st1 # reset values for next call in case of interval == None self . _last_sys_cpu_times = st2 self . _last_proc_cpu_times = pt2 try : # The utilization split between all CPUs. # Note: a percentage > 100 is legitimate as it can result # from a process with multiple threads running on different # CPU cores, see: # http://stackoverflow.com/questions/1032357 # https://github.com/giampaolo/psutil/issues/474 overall_percent = ( ( delta_proc / delta_time ) * 100 ) * num_cpus except ZeroDivisionError : # interval was too low return 0.0 else : return round ( overall_percent , 1 )