PyQT校验文件MD5值

 

import sys
import os

import hashlib
import pyperclip

from PyQt5.QtWidgets import QApplication, QWidget, QPushButton,  QMessageBox
from PyQt5.Qt import QLineEdit

class App(QWidget):

    def __init__(self):
        super().__init__()
        self.title = 'MD5校验'
        self.left = 800
        self.top = 600
        self.width = 320
        self.height = 200
        self.initUI()

    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)

        # create textbox
        self.textbox = QLineEdit(self)
        self.textbox.setText(FileRecord.readpath()) #读取文本框的默认值
        self.textbox.move(20, 20)
        self.textbox.resize(280, 40)

        # Create a button in the window
        self.button = QPushButton('校验', self)
        self.button.move(20, 80)

        # connect button to function on_click
        self.button.clicked.connect(self.on_click)
        self.show()

    def on_click(self):
        textboxValue = self.textbox.text()
        md5 = GetFileMd5(textboxValue)
        QMessageBox.question(self, "Message", 'MD5:' + md5+'\n'+'\n'+'已复制，直接cmd+c使用',
                             QMessageBox.Ok,QMessageBox.Ok)
        pyperclip.copy(md5) #自动复制md5到剪切板
        FileRecord.writpath(textboxValue) #保存路径记录


#保存、读取MD5记录
class FileRecord():

    #保存
    def writpath(filepath):
        with open('md5.txt','w') as f:
            f.write(filepath)

    #读取
    def readpath():
        try:
            with open('md5.txt','r') as f:
                record = f.readline()
                return record

        #如果文件不存在创建
        except FileNotFoundError:
            with open('md5.txt','w') as f:
                return


#校验MD5值
def GetFileMd5(filename):
    if not os.path.isfile(filename):
        return
    myHash = hashlib.md5()
    f = open(filename,'rb')
    while True:
        b = f.read(8096)
        if not b :
            break
        myHash.update(b)
    f.close()
    return myHash.hexdigest()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    app.exit(app.exec_())