问当内存中有巨大(33 is )数据结构(没有交换)时，Python继续运行10+mins (在程序中的最后一条语句之后)。

EN

class my_class():
    def __init__(self):
        cmd = f'gunzip huge-file.gz'
        self.process = subprocess(cmd, stdout=subprocess.PIPE, shell=True)
        self.data_struct = dict()

    def populate_struct(self):
        for line in process.stdout:
            <populate the self.data_struct dictionary>
        
    def __del__():
        self.process.wait()
        #del self.data_struct  # presence/absence of this statement decreases/increases runtime respectively
#================End of my_class===================

def main():
    my_object = my_class()
    my_object.populate_struct()
    print(f'~~~~ Finished populate_struct() ~~~~')  # last statement in my program.
    ## Python keeps running at 100% past the previous statement for 10+mins

if __name__ == '__main__':
    main()
#================End of Main=======================

munmap(0x2b3c75375000, 41947136)        = 0
munmap(0x2b3c73374000, 33558528)        = 0
munmap(0x2b4015d2a000, 262144)          = 0
munmap(0x2b4015cea000, 262144)          = 0
munmap(0x2b4015caa000, 262144)          = 0
munmap(0x2b4015c6a000, 262144)          = 0
munmap(0x2b4015c2a000, 262144)          = 0
munmap(0x2b4015bea000, 262144)          = 0
munmap(0x2b4015baa000, 262144)          = 0
...
...