在python

Question

我需要建议。这是我的程序，我们在设置的时间内从perforce获取最新文件。但是我发现，我们只能启动一次线程，因此，这只能运行一次。我知道，我可以在一个def中编写所有内容并且它会没问题，但是也许有人知道简单的方法使它与线程一起工作吗？

这是代码：

import P4
import time
from datetime import datetime,date
import traceback
import os
import sys
import threading
from PyQt5 import QtCore
from PyQt5 import QtGui
from PyQt5.QtWidgets import *
from PyQt5.QtCore import QCoreApplication, QTimer

p4 = P4.P4()
seconds = 0
p4.port="p4-1:1666"
p4.user=""
zero_time=QtCore.QTime(0,00,00)
cur_time=QtCore.QTime.currentTime()
now = QtCore.QTime.currentTime()
sync_time=QtCore.QTime(3,00,00)
syncTime=zero_time.addSecs(now.secsTo(sync_time))

def clock(seconds):
    minutes = 0
    while True:
        seconds=seconds+1
        time.sleep(1)
        if t2.isAlive()==False:
            print("Completed!! Connection ended at",datetime.strftime(datetime.now(), "%d.%m  %H:%M:%S"))
            print("It took ",minutes," minutes and",seconds," seconds.") 
            break
        if seconds==60:
            seconds=0
            minutes=minutes+1
def just():
    print("Connection and sync started. Wait")
    print("Connection started at ",datetime.strftime(datetime.now(), "%d.%m %H:%M:%S "))
    try:
        p4.connect()
        p4.run("sync")
    except:
        print("Some mistakes occured:")
        Type, Value, Trace = sys.exc_info()
        print(Value)
def center(widget):
    qr = widget.frameGeometry()
    cp = QDesktopWidget().availableGeometry().center()
    qr.moveCenter(cp)
    widget.move(qr.topLeft())

def user_name():
    def set_sync_time():
        sync_time.setHMS(userTime.time().hour(),userTime.time().minute(),userTime.time().second())
    app = QApplication(sys.argv)
    user_name_wdgt=QWidget()
    user_name_wdgt.resize(280,150)
    user_name_wdgt.move(300,300)
    user_name_wdgt.setWindowTitle('User name')
    lblName = QLabel("Time until sync  "+syncTime.toString(),user_name_wdgt)
    lblName.move(90,10)
    userTime =QTimeEdit(user_name_wdgt)
    userTime.move(120,40)
    qbtn = QPushButton('Set sync time',user_name_wdgt)
    qbtn.clicked.connect(set_sync_time)
    qbtn.resize(qbtn.sizeHint())
    qbtn.move(110, 75)
    center(user_name_wdgt)
    text, ok = QInputDialog.getText(user_name_wdgt, 'User name window', 'Enter your name(same as workspace):')
    if ok:
        p4.user=str(text)
    def update_label():
        cur_time = QtCore.QTime.currentTime()
        syncTime=zero_time.addSecs(cur_time.secsTo(sync_time))
        lblName.setText("Time until sync  "+syncTime.toString())
        if syncTime==zero_time:
            t2.start()
            t1.start()
    timer = QTimer()
    timer.timeout.connect(update_label)
    timer.start(1000)
    user_name_wdgt.show()
    sys.exit(app.exec_())
t1 = threading.Thread(target=clock, args=(0,))
t2 = threading.Thread(target=just)
t3 = threading.Thread(target=user_name)
t3.start()

这是工作部分，希望它能帮到某人：

def update_label():
        cur_time = QtCore.QTime.currentTime()
        syncTime=zero_time.addSecs(cur_time.secsTo(sync_time))
        lblName.setText("Time until sync  "+syncTime.toString())
        if syncTime==zero_time:
            global t2,t1
            t2 = threading.Thread(target=just)
            t1 = threading.Thread(target=clock, args=(0,))
            t2.start()
            t1.start()
    timer = QTimer()
    timer.timeout.connect(update_label)
    timer.start(1000)
    user_name_wdgt.show()
    sys.exit(app.exec_())
t2 = threading.Thread(target=just)
t3 = threading.Thread(target=user_name)
t3.start()