Python Forum

the code run well in windows but it is leading to interface stuck(the whole system interface) under the ubuntu(16.04 and 18.04).
what's wrong?
thank you!
run.py

# #!/usr/bin/python3
# #-*-coding: UTF-8 -*-
import tkinter
from tkinter import filedialog as tkFiledialog
import plotMagDynamic

def plotMagDynamicLine():
    plotMagDynamic.plotUsingMultiprocessing()
if __name__ == '__main__':
 
    # plotMagDynamicLine()
    
    
    
    top=tkinter.Tk(className='plot')
    frm = tkinter.Frame(top)
    tkinter.Button(frm, text="plot",command =plotMagDynamicLine,width=20,height=2).pack(side=tkinter.LEFT)
    text=tkinter.Text(top,width=60,height=20)
    frm.pack(side=tkinter.TOP)

    top.mainloop()
    

plotMagDynamic.py

# #!/usr/bin/python3
# #-*-coding: UTF-8 -*-
import tkinter
from tkinter import filedialog as tkFiledialog
import os
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import configparser
import re
import math
import yaml#读取配置文件
import multiprocessing
from multiprocessing import Pool as ProcessPool#多进程

def plotProcessing(name):
    t=[1,2,3]
    TM=[1,2,3]
    RE=[1,2,3]
    fig = plt.figure(num=1, figsize=(15, 8))  # 开启一个窗口，同时设置大小，分辨率
    ax1 = fig.add_subplot(1,1,1)  # 通过fig添加子图，参数：行数，列数，第几个。
    ax1.plot(t, TM, label='TM')
    ax1.plot(t, RE, label='RE')
    ax1.hlines(0, 0, np.max(t), colors="r", linestyles="dashed")
    ax1.set_xlabel("Time [ps]")
    ax1.set_ylabel("Normalized Magnetization (m_z)")
    ax1.legend()  # 显示图例
    pngPath =  "./plot_" + str(name) + ".png"
    if (os.path.exists(pngPath) == True):
        os.remove(pngPath)
    fig.savefig(pngPath)
    plt.close('all')
    print(pngPath)


#多进程
def multi_wrapper(args):
    return plotProcessing(*args)
def plotUsingMultiprocessing():
    nameArr=[9,8,7]
    cpu_count=multiprocessing.cpu_count()#返回本计算机的cpu数量(包括超线程，一般是指核心，而非物理cpu个数)
    pool=0
    if(cpu_count-2>0):
        pool = ProcessPool(processes = cpu_count-2)
    else:
        pool = ProcessPool(processes = 1)
    zip_args = list(zip(nameArr))#由于不给传入多个参数,现目前使用折中方法解决
    results = pool.map(multi_wrapper, zip_args)
    pool.close()
    pool.join()
    print ("Sub-process(es) done.")

it is run well in the virtual machine(ubuntu 18.04) but it is leading to interface stuck in my host(ubuntu 18.04) and my friend's host system(ubuntu 16.04)

the gnome-shell take up 100% percent of cpu

up..........