Python's approach to obtaining system memory usage under Linux systems

The example in this paper describes how Python obtains system memory usage under Linux systems. Share to everyone for your reference. Specific as follows:

"" "Simple module for getting amount of memory used by a specified user's processes on a UNIX system. It uses UNIX PS utility to get the memory usage for a specified username and pipe it to awk for summing upper application Memory usage and return the total. Python ' s Popen () from subprocess module was used for spawning PS and awk. "" Import Subprocessclass Memorymonitor (object):  def __init__ (self, username): "" "    Create new Memorymonitor instance.    "" " Self.username = Username  def usage (self): "" "    Return int containing memory used by user ' s processes.    " " Self.process = subprocess. Popen ("Ps-u%s-o RSS | awk ' {sum+=$1} END {print sum} ' "% Self.username,                    shell=true,                    stdout=subprocess. PIPE,                    )    self.stdout_list = Self.process.communicate () [0].split (' \ n ')    return int (self.stdout_list[0])

Save the above code as: memorymonitor.py

The calling method is as follows:

From memorymonitor Import Memorymonitormemory_mon = Memorymonitor (' username ') used_memory = Memory_mon.usage ()

Hopefully this article will help you with Python programming.

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