Python GUI Image Upload (Copy source file to destination directory). Require Python 2.7 + PySide QT Binding

photouploader.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'main.ui'
#
# Created: Thu Dec 08 03:07:21 2016
#      by: pyside-uic 0.2.15 running on PySide 1.2.4
#
# WARNING! All changes made in this file will be lost!

from PySide import QtCore, QtGui
import os
import re
import shutil

class Ui_PhotoUploader(object):
    def setupUi(self, PhotoUploader):
        PhotoUploader.setObjectName("PhotoUploader")
        PhotoUploader.resize(338, 511)
        PhotoUploader.setMinimumSize(QtCore.QSize(338, 511))
        PhotoUploader.setMaximumSize(QtCore.QSize(338, 511))
        self.labelPic = QtGui.QLabel(PhotoUploader)
        self.labelPic.setGeometry(QtCore.QRect(20, 150, 300, 300))
        self.labelPic.setAcceptDrops(False)
        self.labelPic.setAutoFillBackground(True)
        self.labelPic.setFrameShape(QtGui.QFrame.Box)
        self.labelPic.setText("")
        self.labelPic.setObjectName("labelPic")
        self.label_2 = QtGui.QLabel(PhotoUploader)
        self.label_2.setGeometry(QtCore.QRect(20, 130, 46, 13))
        self.label_2.setObjectName("label_2")
        self.imagePath = QtGui.QLineEdit(PhotoUploader)
        self.imagePath.setGeometry(QtCore.QRect(20, 40, 201, 20))
        self.imagePath.setObjectName("imagePath")
        self.browseBut = QtGui.QPushButton(PhotoUploader)
        self.browseBut.setGeometry(QtCore.QRect(240, 40, 75, 23))
        self.browseBut.setObjectName("browseBut")
        self.label_3 = QtGui.QLabel(PhotoUploader)
        self.label_3.setGeometry(QtCore.QRect(20, 20, 81, 16))
        self.label_3.setObjectName("label_3")
        self.label_4 = QtGui.QLabel(PhotoUploader)
        self.label_4.setGeometry(QtCore.QRect(20, 80, 91, 16))
        self.label_4.setObjectName("label_4")
        self.savePathBut = QtGui.QPushButton(PhotoUploader)
        self.savePathBut.setGeometry(QtCore.QRect(240, 100, 75, 23))
        self.savePathBut.setObjectName("savePathBut")
        self.savePath = QtGui.QLineEdit(PhotoUploader)
        self.savePath.setGeometry(QtCore.QRect(20, 100, 201, 20))
        self.savePath.setObjectName("savePath")
        self.uploadBut = QtGui.QPushButton(PhotoUploader)
        self.uploadBut.setGeometry(QtCore.QRect(130, 470, 75, 23))
        self.uploadBut.setObjectName("uploadBut")

        self.retranslateUi(PhotoUploader)
        QtCore.QMetaObject.connectSlotsByName(PhotoUploader)

        # "event listener", when a button clicked, call function selectFile
        self.browseBut.clicked.connect(lambda:self.selectFile("choosePic"))
        self.savePathBut.clicked.connect(lambda:self.selectFile("choosePath"))
        self.uploadBut.clicked.connect(lambda:self.selectFile("uploadPic"))

    # function for select file
    def selectFile(self,type):
        if type == "choosePic":
            # open up file chooser, and get the path. "getOpenFileName" for getting file path
            fileName = str(QtGui.QFileDialog.getOpenFileName(caption="Select Image", filter="Image (*.jpg *.jpeg *.png *.gif *.bmp)")) # set image file filter
            # use regex to only get the file path
            m = re.search('(\'(.+?)\')', fileName)
            if m:
                fileName = m.group(1)
            # replace unnecessary "'" in the path
            fileName = fileName.replace("'","")

            # set path to output box and display image to label
            self.imagePath.setText(fileName)
            
            pixmap = QtGui.QPixmap(fileName) # create pixmap object
            pixmap = pixmap.scaled(300,300) # resize image
            self.labelPic.setPixmap(pixmap) # set the image to the label
        if type == "choosePath":
             # open up file chooser, and get the path. "getExistingDirectory" for getting directory path
            pathSave = str(QtGui.QFileDialog.getExistingDirectory())
            pathSave = pathSave.replace("\\","/")
            # set save path to the output box
            self.savePath.setText(pathSave)
        if type == "uploadPic":
            fileName = str(self.imagePath.text()) # get save path
            pathSave = str(self.savePath.text()) # get image path

            # validate form
            if fileName != "" and pathSave != "":
                # copy/upload the image
                # use "copy2" if dont have to rename file, use "copyfile" if want to rename file (include new file name in the save path)
                shutil.copy2(fileName, pathSave) 

                self.alertBox("File uploaded!") # call alert message function
                
                # clear all field
                self.savePath.setText("")
                self.imagePath.setText("")
                self.labelPic.setPixmap("")
            else:
                self.alertBox("Please choose image and save path before upload!")

    # create message box function
    def alertBox(self,msg):
        msgBox = QtGui.QMessageBox() 
        msgBox.setWindowTitle("Alert");
        msgBox.setText(msg);
        msgBox.exec_();

    def retranslateUi(self, PhotoUploader):
        PhotoUploader.setWindowTitle(QtGui.QApplication.translate("PhotoUploader", "Photo Uploader", None, QtGui.QApplication.UnicodeUTF8))
        self.label_2.setText(QtGui.QApplication.translate("PhotoUploader", "Preview", None, QtGui.QApplication.UnicodeUTF8))
        self.browseBut.setText(QtGui.QApplication.translate("PhotoUploader", "Browse", None, QtGui.QApplication.UnicodeUTF8))
        self.label_3.setText(QtGui.QApplication.translate("PhotoUploader", "Choose image:", None, QtGui.QApplication.UnicodeUTF8))
        self.label_4.setText(QtGui.QApplication.translate("PhotoUploader", "Choose save path:", None, QtGui.QApplication.UnicodeUTF8))
        self.savePathBut.setText(QtGui.QApplication.translate("PhotoUploader", "Browse", None, QtGui.QApplication.UnicodeUTF8))
        self.uploadBut.setText(QtGui.QApplication.translate("PhotoUploader", "Upload", None, QtGui.QApplication.UnicodeUTF8))


if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    PhotoUploader = QtGui.QDialog()
    ui = Ui_PhotoUploader()
    ui.setupUi(PhotoUploader)
    PhotoUploader.show()
    sys.exit(app.exec_())