Pyqt5 实现多线程文件搜索的案例

pip install pyqt5

# -*- coding: utf-8 -*-
# @Time  : 2018\9\15 20:39
# @Author : Tang weiyang
# @File  : FileSearch02.py
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtGui import QIcon
import sys
import os
import threading
class fileSearchThread(QThread):
  sinOut = pyqtSignal(str)
  # 自定义信号，执行run()函数时，从相关线程发射此信号
  def __init__(self,key):
    super().__init__()
    self.key = key
  def run(self):
    threads=[]
    path = [r"c:\\", r"d:\\", r"e:\\", r"f:\\"]
    #通过多线程对windows下的多个盘符进行文件的遍历查找
    for each in path:
      t = threading.Thread(target=self.search, args=(self.key,each,))
      threads.append(t)
      t.start()
    for i in range(len(threads)): #将主线程阻塞
      threads[i].join()
    print("搜索结束")
  def search(self,keyword, path):
    for dirpath, dirnames, filenames in os.walk(path):
      for filename in filenames:
        if filename.__contains__(keyword):
          print(os.path.join(dirpath, filename))
          self.sinOut.emit(os.path.join(dirpath, filename))
      for folder in dirnames:
        if folder.__contains__(keyword):
          print(os.path.join(dirpath,folder))
          self.sinOut.emit(os.path.join(dirpath,folder))
class fileSearch(QListWidget):
  def __init__(self):
    super().__init__()
    self.Ui()
  def Ui(self):
    self.key= QLineEdit()
    self.bt=QPushButton("搜索")
    self.result = QListWidget()
    self.bt.clicked.connect(self.ButtonClicked) #按钮单击信号绑定到槽
    # self.line.editingFinished.connect(self.Action)
    self.key.editingFinished.connect(self.ButtonClicked)
    grid = QGridLayout()
    grid.setSpacing(10) # 创建标签之间的空间
    grid.addWidget(self.key, 1, 0) # （1,0）表示显示的位置
    grid.addWidget(self.bt, 1, 1)
    grid.addWidget(self.result, 2, 0, 5, 2) # 指定组件的跨行和跨列的大小，指定这个元素跨5行显示
    self.setLayout(grid)
    for i in range(1,100):
      self.result.addItem("搜索"+str(i)+"个项目")
    self.result.itemClicked.connect(self.Clicked)
    self.setGeometry(300, 300, 500, 500)
    self.setWindowTitle('文件搜索')
    self.setWindowIcon(QIcon('icon.jpg'))
    self.show()
  def Clicked(self, item):
    QMessageBox.information(self, "ListWidget", "You clicked: " + item.text())
    os.startfile(item.text()) #打开文件
  def ButtonClicked(self):
    # 创建新线程，将自定义信号sinOut连接到slotAdd()槽函数
    keyword = self.key.text()
    self.result.clear()
    self.thread=fileSearchThread(keyword)
    self.thread.sinOut.connect(self.slotAdd)
    self.thread.start()
  def slotAdd(self,filename):
    self.result.addItem(str(filename))
if __name__ == '__main__':
  app = QApplication(sys.argv)
  ex = fileSearch()
  sys.exit(app.exec_())

sinOut = pyqtSignal(str) #自定义一个信号槽
self.thread.sinOut.connect(self.slotAdd)#信号绑定到槽
self.sinOut.emit(os.path.join(dirpath,folder)) #发射信号

from PyQt5 import QtWidgets, QtCore
from testqt.TEST_QT_FROM import Ui_Dialog
import sys
from PyQt5.QtCore import *
import time

# 继承QThread
class Runthread(QtCore.QThread):
  # python3,pyqt5与之前的版本有些不一样
  # 通过类成员对象定义信号对象
  _signal = pyqtSignal(str)
 
  def __init__(self):
    super(Runthread, self).__init__()
 
  def __del__(self):
    self.wait()
 
  def run(self):
    print("run 666")
    self._signal.emit("run 666"); # 信号发送
 
class TestQtFromC(QtWidgets.QWidget, Ui_Dialog):
  text =""
  def __init__(self):
    super(TestQtFromC, self).__init__()
    self.setupUi(self)
 
  #click
  def timer_click(self):
    self.thread = Runthread() # 创建线程
    self.thread._signal.connect(self.callbacklog) # 连接信号
    self.thread.start() # 开始线程
 
  # callback
  def callbacklog(self, msg):
    self.text =self.text+time.strftime("%Y-%m-%d %H:%M:%S ", time.localtime())+msg+ "\n"
    print(self.text)
    # 回调数据输出到文本框
    self.textEdit.setText(self.text);
 
if __name__ == "__main__":
  app = QtWidgets.QApplication(sys.argv)
  mTestQtFromC = TestQtFromC()
  mTestQtFromC.show()
  sys.exit(app.exec_())