pyside2的相同代码在MacOS 11.2.3上运行,但在Ubuntu 20.4上抛出错误

我使用PySide2、numpy和matplotlib编写GUI,在MacOS 11.2.3上运行时没有任何问题。然而,我在Ubuntu 20.4上运行代码时出错,代码正常

我使用PySide2和matplotlib制作了一个GUI。目标是点击图像,并将点击的坐标存储在csv中。在Ubuntu上启动应用程序并点击“按钮”按钮后,我收到一条错误消息(在代码后面提供)。在Linux下,代码似乎一直运行到第91行(虽然图像上没有点击,因此,存储它们的数据帧显然是空的),而在MacOS上,解释器在第76行停止,等待用户的点击(在MacOS上,图片已经启动,终端上没有任何内容)

以下是代码:

import numpy as np 
import pandas as pd
import os
import sys 
import matplotlib.pyplot as plt


from PySide2 import QtGui
from PySide2 import QtCore
from PySide2.QtWidgets import QWidget, QApplication, QPushButton, QFileDialog
os.environ['QT_MAC_WANTS_LAYER'] = '1'



coords_Event = [] 

size_win_x = 10
size_win_y = 7
dpi_val = 100


class GUI(QWidget):
    def __init__(self):
        super(GUI, self).__init__()

        self.initUI()

    def initUI(self):
        height_btn = 40 
        width_btn = 350
        
        button_position_x = 0
        button_position_y = 20 
        
        button_position_x = button_position_x + 50
        btn2 = QPushButton('Button', self)     
        btn2.clicked.connect(self.Event)
        btn2.resize(width_btn, height_btn + 20)
        btn2.move(button_position_y, button_position_x)       

        self.show()


    def Event(self):
        dir_path = os.getcwd()

        figure = plt.figure(figsize = (size_win_x,size_win_y), dpi=dpi_val) 

        global coords_Event
        coords_Event = []

        def onclick(event):
                ix, iy = event.xdata, event.ydata
                print('x = %d, y = %d'%(
                    ix, iy))
                global coords_Event
                coords_Event.append((ix, iy))
                return coords_Event        
        cid = figure.canvas.mpl_connect('button_press_event', onclick)

        pixel_array = np.array([[1,2,3], [100,5,6]])
        figure2 = plt.imshow(pixel_array)
        plt.savefig(dir_path + '/raw.png')
        plt.title("the title")
        plt.show()
        
        print("ok1")

        df = pd.DataFrame(coords_Event,
                columns = ['X', 'Y']) 
        string_csv = dir_path + "/coords_Event.csv"

        print("ok2")
        print(string_csv)
        df.to_csv(string_csv, 
        header=True)
        df2 = pd.read_csv(string_csv)  
        print("df2: ", df2)
        print(df2.iloc[0]["X"])
        print(df2.iloc[1]["X"])
        
        print("ok3")
        ic(coords_Event)

        clicked_data = (coords_Event[1][0] - coords_Event[0][0]) 
        df3 = pd.DataFrame ({"clicked_data": [clicked_data]})
        string_csv = dir_path + "/clicked_data.csv"
        print(string_csv)
        df3.to_csv(string_csv, 
        header=True)
        print("ok5")

def main():

    app = QApplication(sys.argv)
    ex = GUI()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

以下是Ubuntu上的错误消息

QCoreApplication::exec: The event loop is already running
ok1
[]
ok2
/home/user/Documents/myApp/coords_Event.csv
df2:  Empty DataFrame
Columns: [Unnamed: 0, X, Y]
Index: []
Traceback (most recent call last):
  File "debug_05.py", line 92, in Event
    print(df2.iloc[0]["X"])
  File "/home/user/Documents/myApp/env/lib/python3.8/site-packages/pandas/core/indexing.py", line 895, in __getitem__
    return self._getitem_axis(maybe_callable, axis=axis)
  File "/home/user/Documents/myApp/env/lib/python3.8/site-packages/pandas/core/indexing.py", line 1501, in _getitem_axis
    self._validate_integer(key, axis)
  File "/home/user/Documents/myApp/env/lib/python3.8/site-packages/pandas/core/indexing.py", line 1444, in _validate_integer
    raise IndexError("single positional indexer is out-of-bounds")
IndexError: single positional indexer is out-of-bounds

我检查了Ubuntu和MacOS上的环境包,它们完全一样

下面是一段代码,它可能更严格,在linux下输出单击的坐标,但在MacOS下不输出:

import numpy as np 
import pandas as pd
import os
import sys 
import matplotlib.pyplot as plt


from PySide2 import QtGui
from PySide2 import QtCore
from PySide2.QtWidgets import QWidget, QApplication, QPushButton, QFileDialog
os.environ['QT_MAC_WANTS_LAYER'] = '1'

coords_Event = [] 

size_win_x = 2
size_win_y = 2
dpi_val = 100

class GUI(QWidget):
    def __init__(self):
        super(GUI, self).__init__()

        self.initUI()

    def initUI(self):
        height_btn = 40 
        width_btn = 350
        
        button_position_x = 0
        button_position_y = 20 
        
        button_position_x = button_position_x + 50
        btn2 = QPushButton('Button', self)     
        btn2.clicked.connect(self.Event)
        btn2.resize(width_btn, height_btn + 20)
        btn2.move(button_position_y, button_position_x)       

        self.show()

    def Event(self):
        dir_path = os.getcwd()

        def onclick(event):
            global ix, iy
            ix, iy = event.xdata, event.ydata
            print('x = %d, y = %d'%(
                ix, iy))
            global coords_Event
            coords_Event.append((ix, iy))
            return coords_Event        

        fig = plt.figure(figsize = (size_win_x,size_win_y), dpi=dpi_val) 
        pixel_array = np.array([[1,2,3,4,5,6], [1,2,3,4,5,6], [1,2,3,4,5,6]])
        fig2 = plt.imshow(pixel_array)
        
        cid = fig.canvas.mpl_connect('button_press_event', onclick)

        plt.show()
        print(coords_Event)

def main():

    app = QApplication(sys.argv)
    ex = GUI()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()