python+pyqt5编写md5生成器

import hashlib, os, sysfrom PyQt5.QtGui import QFont, QIconfrom PyQt5.QtWidgets import (QFileDialog, QGridLayout, QLineEdit, QTextEdit,QLabel, QWidget, QToolTip,  QPushButton, QApplication)from PyQt5.QtCore import QCoreApplication#小文件的处理函数def get_md5_small(file_path): md5 = None if os.path.exists(file_path) and os.path.isfile(file_path):  with open( file_path, 'rb' ) as f:   md5_obj = hashlib.md5()   md5_obj.update( f.read() )   hash_code = md5_obj.hexdigest()   md5 = str(hash_code).lower() return md5#大文件的处理函数def get_md5_big(file_path): md5 = None if os.path.exists(file_path) and os.path.isfile(file_path):  with open( file_path, 'rb' ) as f:   md5_obj = hashlib.md5()   while True:    d = f.read(8096)    if not d:     break    md5_obj.update(d)   hash_code = md5_obj.hexdigest()   md5 = str( hash_code ).lower() return md5class MainBody(QWidget): def __init__(self):  super(MainBody, self).__init__()  self.init() def init(self):  #布局  grid = QGridLayout()  self.setLayout(grid)  grid.setSpacing(10)  #文件路径  self.m_tedit = QTextEdit()  self.m_tedit.setToolTip( u'可以拖拽文件到这里来' )  grid.addWidget(self.m_tedit, 1, 0, 2, 3)  #四个按钮  self.m_select_btn = QPushButton(u'选择文件')  self.m_select_btn.clicked.connect( self.select_func )  self.m_generate_btn = QPushButton(u'生成')  self.m_generate_btn.clicked.connect( self.generate_func )  self.m_clear_btn = QPushButton(u'清空')  self.m_clear_btn.clicked.connect( self.clear_func )  self.m_copy_btn = QPushButton(u'复制')  self.m_copy_btn.clicked.connect( self.copy_func )  grid.addWidget(self.m_select_btn, 3, 0)  grid.addWidget(self.m_generate_btn, 3, 1)  grid.addWidget(self.m_clear_btn, 3, 2)  grid.addWidget(self.m_copy_btn, 5, 1)  #md5的输出区域  self.m_output = QLineEdit()  grid.addWidget(self.m_output, 4, 0, 1, 3)  self.setGeometry(300,300,300,200)  self.setWindowTitle(u"md5生成器")  self.setWindowIcon(QIcon('icon.png'))  self.show() #选择文件 def select_func(self):  filename, ok = QFileDialog.getOpenFileName(self, "Open file", "C:/Users/Administrator/Desktop")  print(os.path.getsize(filename))  self.m_tedit.setText( filename )  self.m_output.clear() #生成md5按钮 def generate_func(self):  path = self.m_tedit.toPlainText()  if path.startswith( 'file:///' ):   path = path[8:]  if os.path.exists(path) and os.path.isfile(path):   #200M以上的当作大文件   if os.path.getsize(path) >= 200*1024*1204:    md5 = get_md5_big( path )   else:    md5 = get_md5_small( path )   self.m_output.setText( md5 ) def clear_func(self):  self.m_tedit.clear()  self.m_output.clear() #复制 def copy_func(self):  clipboard = QApplication.clipboard()  clipboard.setText( self.m_output.text() )if __name__ == "__main__": app = QApplication(sys.argv) mb = MainBody() sys.exit( app.exec_() )