如何将GUI上传的图像名称传递给另一个函数？

Question

这里是场景。首先，我想将图像上传到GUI。稍后按另一个按钮我想处理这个上传的图像。现在，我可以在GUI中显示图像。但我对如何获得这个图像的名字一无所知，所以我通过按另一个按钮来处理这个图像。现在，这里是我的代码：现在

from PyQt4 import QtGui, QtCore 
from PyQt4.QtGui import * 
import sys 
import cv2 
from sklearn.externals import joblib 
from sklearn.svm import LinearSVC 
from skimage.feature import hog 
import numpy as np 
import os.path 

class MainWindow(QtGui.QMainWindow): 

    def __init__(self): 
     super(MainWindow, self).__init__()   
     self.setGeometry(100, 100, 1000,600) 
     self.setWindowTitle("HandWritten Image Recognition") 

     extractAction = QtGui.QAction("&Quit", self) 
     extractAction.setShortcut("Ctrl+Q") 
     extractAction.setStatusTip("Leave the App") 
     extractAction.triggered.connect(self.close_application) 

     openFile = QtGui.QAction("&Open File", self) 
     openFile.setShortcut("Ctrl+O") 
     openFile.setStatusTip("Open File") 
     openFile.triggered.connect(self.file_open) 

     processImage = QtGui.QAction("&Process Image", self) 
     processImage.setShortcut("Ctrl+A") 
     processImage.setStatusTip("Process Image") 
     processImage.triggered.connect(self.process_image) 

     mainMenu = self.menuBar() 

     fileMenu = mainMenu.addMenu('&File') 
     fileMenu.addAction(openFile) 
     fileMenu.addAction(processImage)   
     fileMenu.addAction(extractAction) 

    def file_open(self): 
     # This function is called when the user clicks File->Open. 
     filename = QtGui.QFileDialog.getOpenFileName() 
     print(filename) 
     label = QtGui.QLabel(self) 
     label.setGeometry(QtCore.QRect(0, 20, 1000, 580)) 
     label.setSizePolicy(QtGui.QSizePolicy.Preferred,QtGui.QSizePolicy.Preferred) 
     label.setScaledContents(True) 
     pixmap = QtGui.QPixmap(filename) 
     label.setPixmap(pixmap) 
     label.show() 

    def process_image(self): 
     ###Get Uploaded Image's Name 

    def close_application(self): 
     print("Why so hurry!!!") 
     sys.exit() 

def main(): 
    app = QtGui.QApplication(sys.argv) 
    win = MainWindow() 
    win.show() 
    app.exec_() 

if __name__ == '__main__': 
    sys.exit(main()) 

，在process_image功能，我想使用上传的图像，这样我就可以进一步处理它。所以，为此我想知道上传图像的文件路径。请在这里指导我。

Answer 1

很简单。请将filename改为self对象的变量image。请下面的代码添加到您的功能process_image：

os.path.basename(str(self.image)) 

请在这里找到更新的代码：

from PyQt4 import QtGui, QtCore 
from PyQt4.QtGui import * 
import sys 
import cv2 
from sklearn.externals import joblib 
from sklearn.svm import LinearSVC 
from skimage.feature import hog 
import numpy as np 
import os.path 

class MainWindow(QtGui.QMainWindow): 

    def __init__(self): 
     super(MainWindow, self).__init__()   
     self.setGeometry(100, 100, 1000,600) 
     self.setWindowTitle("HandWritten Image Recognition") 

     extractAction = QtGui.QAction("&Quit", self) 
     extractAction.setShortcut("Ctrl+Q") 
     extractAction.setStatusTip("Leave the App") 
     extractAction.triggered.connect(self.close_application) 

     openFile = QtGui.QAction("&Open File", self) 
     openFile.setShortcut("Ctrl+O") 
     openFile.setStatusTip("Open File") 
     openFile.triggered.connect(self.file_open) 

     processImage = QtGui.QAction("&Process Image", self) 
     processImage.setShortcut("Ctrl+A") 
     processImage.setStatusTip("Process Image") 
     processImage.triggered.connect(self.process_image) 

     mainMenu = self.menuBar() 

     fileMenu = mainMenu.addMenu('&File') 
     fileMenu.addAction(openFile) 
     fileMenu.addAction(processImage)   
     fileMenu.addAction(extractAction) 

    def file_open(self): 
     # This function is called when the user clicks File->Open. 
     filename = QtGui.QFileDialog.getOpenFileName() 
     print(filename) 
     self.image = filename #Assign filename to object's variable 'image' 
     label = QtGui.QLabel(self) 
     label.setGeometry(QtCore.QRect(0, 20, 1000, 580)) 
     label.setSizePolicy(QtGui.QSizePolicy.Preferred,QtGui.QSizePolicy.Preferred) 
     label.setScaledContents(True) 
     pixmap = QtGui.QPixmap(filename) 
     label.setPixmap(pixmap) 
     label.show() 

    def process_image(self): 
     print os.path.basename(str(self.image)) #Get only file name with it's extension 

    def close_application(self): 
     print("Why so hurry!!!") 
     sys.exit() 

def main(): 
    app = QtGui.QApplication(sys.argv) 
    win = MainWindow() 
    win.show() 
    app.exec_() 

if __name__ == '__main__': 
    sys.exit(main())