Python memory release principle

DefgetInit (class_name): & amp; quot; dynamic loading Module & amp; quot; resultmodule _ import _ (class_name, globals (), locals (), [class_name]) resultclassgetattr (resultmodule, class_n...

Def getInit (class_name): "dynamic loading module" resultmodule = _ import _ (class_name, globals (), locals (), [class_name]) resultclass = getattr (resultmodule, class_name) return resultclass () import threading, time class B: def _ init _ (self, * args, ** kwargs): self. name = "B" self. class_name = "a" print "% s is inited" % (self. name) def _ del _ (self): print "% s is deleted" % (self. name) def other_run (self, obj = None): if obj: obj. run () def run (self, * args, ** kwargs): obj = getInit (self. class_name) obj. run () self. other_run (obj) print "% s is run" % (self. name) def treading (): n = 0 c = B () while n <2: n + = 1 print "\ n" print "start" c. run () print "end" print "\ n" if _ name _ = '_ main _': param = {} th = threading. thread (target = treading, args = () th. start () exit ()

b is initedstarta is initeda is runa is runb is runa is deletedendstarta is initeda is runa is runb is runa is deletedendb is deleted

Reload a and release the memory in each loop.

def getInit(class_name):    resultmodule = __import__(class_name, globals(), locals(), [class_name])    resultclass = getattr(resultmodule, class_name)    return resultclass()import threading, timeimport a        class b:    def __init__(self, *args, **kwargs):                self.name = "b"        self.class_name = "a"        self.obj = getInit(self.class_name)        print "%s is inited" % (self.name)            def __del__(self):        print "%s is deleted" % (self.name)        def other_run(self):        if self.obj:            self.obj.run()        def run(self, *args, **kwargs):        self.obj.run()        self.other_run()                print "%s is run" % (self.name)        def treading():    n = 0    c = b()    while n<2:        n += 1        print "\n"        print "start"        c.run()        print "end"        print "\n"    if __name__ == '__main__':    param = {}    th = threading.Thread(target = treading, args = ())    th.start()    exit()

a is initedb is initedstarta is runa is runb is runendstarta is runa is runb is runendb is deleteda is deleted

Release only after end


Memory is released based on