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from time import time
try:
import psutil
print('psutil available')
psutil_available=True
except ImportError:
psutil_available=False
class Stats:
def __init__(self):
self.memstats_available = False
if psutil_available:
self.process=psutil.Process()
self.memstats_available = True
self.reset()
def reset(self):
self.lasttime=self._gettime()
self.lastmem=self._getmem()
self.basemem = self.lastmem
self.maxmem=0
self.elapsedtime=0
def _gettime(self):
"""return the time in seconds used by the current process."""
if psutil_available:
m=self.process.get_cpu_times()
return m.user+m.system
return time()
def _getmem(self):
"""return the resident set size in bytes used by the current process."""
if psutil_available:
m=self.process.get_memory_info()
return m.rss
return 0
def time(self):
"""return the time since the last call in seconds used by the current process."""
old = self.lasttime
self.lasttime = self._gettime()
self.elapsedtime = self.lasttime-old
return self.elapsedtime
def memory(self):
"""return the maximum resident set size since the first call in bytes used by the current process."""
self.lastmem = self._getmem()
d = self.lastmem - self.basemem
if d>self.maxmem:
self.maxmem = d
return self.maxmem
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