我是GUI编程的新手，我正在尝试为我的一个python解析器创建一个GUI。
我知道：
Tkinter是单线程的。通过事件循环在每次旅行中发生屏幕更新。只要你有一个长时间运行的命令，就会阻止事件循环完成迭代，从而阻止事件的处理，从而防止重绘。
我的程序调用一个大功能，大约需要5分钟才能完全运行。所以我想唯一的解决方案就是使用线程来执行长时间运行的命令。 但是，我的长期运行命令已在线程中，所以我真的不知道如何继续。
- ＆GT;一旦我点击GUI中的BUT1，程序就会冻结，直到功能完全完成。我想在背景幕中运行此函数，因此程序不会冻结。
- ＆GT;我不是在寻找一个完整的解决方案，但如果有人能让我走上良好的轨道，那就太棒了！
提前谢谢！
这是Main.py - ＆gt; GUI
#!/usr/bin/python
# -*- coding: utf-8 -*-
from Tkinter import *
import sys
import tkMessageBox
import tkFileDialog
import Module_1
import csv
from time import strftime, gmtime
DATE = strftime("_%d_%b_%Y")
class App:
def __init__(self, master):
self.frame = Frame(master, borderwidth=5, relief=RIDGE)
self.frame.grid()
class IORedirector(object):
def __init__(self,TEXT_INFO):
self.TEXT_INFO = TEXT_INFO
class StdoutRedirector(IORedirector):
def write(self,str):
self.TEXT_INFO.config(text=self.TEXT_INFO.cget('text') + str)
self.TEXT_HEADER = self.text_intro = Label(self.frame, bg="lightblue",text="THIS IS \n MY SUPER PROGRAM")
self.TEXT_HEADER.grid(row=0, column=0, columnspan=2, sticky=W+E+N+S)
self.MENU = Frame(self.frame, borderwidth=5, relief=RIDGE, height=12)
self.MENU.grid(row=1, column=0, sticky=N)
self.button = Button(self.MENU, text="QUIT", bg="red", command=self.frame.quit)
self.button.grid(row=4, column=0)
self.BUT1 = Button(self.MENU, text="BUT1", command=self.BUT1)
self.BUT1.grid(row=0, column=0,sticky=W+E)
self.TEXT_INFO = Label(self.frame, height=12, width=40, text="SOME TEXT", bg="grey",borderwidth=5, relief=RIDGE)
self.TEXT_INFO.grid(row=1, column=1, sticky = N+W)
sys.stdout = StdoutRedirector(self.TEXT_INFO)
def BUT1(self):
self.BUT1.config(text="RUNNING")
self.TEXT_INFO.config(text="BUT1 LAUNCHED")
Module_1.main("BUT1")
## HERE WE NEED TO RUN THE FUNCTION
## THE PROGRAMM FREEZE HERE UNTIL THE FUNCTION IS ENTIRELY RUN
self.TEXT_INFO.config(text="BUT1 FINISHED")
self.BUT1.config(text="DONE")
root = Tk()
app = App(root)
root.mainloop()
这是Module_1.py - ＆gt;包含大功能
#!/usr/bin/python
# -*- coding: utf-8 -*-
import Queue
import threading
import urllib2
import time
from bs4 import BeautifulSoup as soup
from urllib2 import urlopen
import re
import os
import random
import sys
import logging
import csv
from time import strftime, gmtime
import os
import random
import shutil
import sys
import re
import logging
from threading import RLock
from time import strftime, gmtime
import csv
import urllib
from urllib import urlretrieve
from grab.spider import Spider, Task
logging.basicConfig(level=logging.CRITICAL) # Loggin to DEBUG / INFO
log = logging.getLogger()
DATE = strftime("_%d_%b_%Y")
class SPIDER1(Spider):
initial_urls = ['URL_THAT_I_NEED_TO_PARSE']
def __init__(self):
super(SPIDER1, self).__init__(
thread_number=20,
network_try_limit=20,
task_try_limit=20
)
self.result = {}
def task_initial(self, grab, task):
for opt in grab.css_list("select[name='Template$TestCentreSearch1$SubRegionList'] option")[1:]:
grab.set_input('Template$TestCentreSearch1$SubRegionList', opt.attrib['value'])
grab.submit(extra_post={
'__EVENTTARGET': 'Template$TestCentreSearch1$SubRegionList'
}, make_request=False)
yield Task('parse', grab=grab, country=opt.text_content())
def task_parse(self, grab, task):
log.info('downloaded %s' % task.country)
city_gen = (x.text_content() for x in grab.css_list(".TestCentreSearchLabel+br+span"))
title_gen = (x.text_content() for x in grab.css_list(".TestCentreSearchTitle"))
id_gen = (x.attrib['href'][-36:] for x in grab.css_list(".TestCentreSearchLink"))
for x in zip(city_gen, title_gen, id_gen):
self.result[x[2]] = {
'country': task.country,
'city': x[0],
'name': x[1],
'id': x[2],
'price':'',
'currency':'',
'fee':''
}
yield Task('info', 'URL_URL=%s' % x[2], id=x[2])
def task_info(self, grab, task):
for label in grab.css_list(".TestCentreViewLabel"):
if label.text_content().strip()=="Test Fee:":
fees = label.getnext().text_content().strip()
self.result[task.id]['fee'] = fees
price = re.findall('\d[\d\., ]+\d',fees)
if price:
price = re.findall('\d[\d\., ]+\d',fees)[0]
self.result[task.id]['price'] = price.replace(' ','').replace(',','.')
currency = re.findall('[A-Z]{2,3}[$|€|£]?',fees)
if not currency:
currency = re.findall('[$|€|£]',fees)
if not currency:
currency = fees.replace(price,'').strip().replace(' ','')
if isinstance(currency,list):
currency = currency[0]
self.result[task.id]['currency'] = currency
#log.info(' %(price)s %(currency)s - %(fee)s ' % self.result[task.id])
break
def dump(self, path):
"""
Save result as csv into the path
"""
with open(path, 'w') as file:
file.write("ID;Country;State;City;Name;Price;Currency;Original Fee\n")
for test_center in sorted(self.result.values(), key=lambda x: "%(country)s%(city)s%(name)s" % x):
file.write(("%(id)s;%(country)s;;%(country)s;%(name)s;%(price)s;%(currency)s;%(fee)s\n" % test_center).encode('utf8'))
def main(choice):
parser, path, name = None, None, None
def run(name,parser,path):
log.info('Parsing %s...' % name)
parser.run()
parser.dump(path)
log.info('Parsing %s completed, data was dumped into %s' % (name, path))
log.info(parser.render_stats())
if choice == "NONE":
# DO NOTHING
# HERE I'D LIKE TO HAVE ANOTHER CALL TO ANOTHER THREADED FUNCTION
elif choice == "BUT1":
run('Function1',SPIDER1(),'C:\LOL\Output1'+DATE+'.csv')
因此，通过单击BUT1，我们运行Module_1.py文件中包含的主要（“BUT1”）函数，其中包含启动的参数BUT1 - ＆gt;运行（ '功能1'，SPIDER1（）， 'C：\ LOL \输出1' + DATE + 'CSV'） 然后程序冻结直到解析器完成工作.. :)）
答案 0 :(得分：3)
问题很简单：在BUT1的调用返回之前，main不会返回。只要main（以及BUT1）没有返回，您的GUI就会被冻结。
要使其工作，您必须将main放在一个单独的线程中。 main生成其他线程是不够的，如果它正在做的就是等待那些线程。
答案 1 :(得分：2)
如果偶尔从BUT1函数调用root.update()，则应该阻止GUI冻结。你也可以用固定间隔的python线程来做到这一点。
例如，每0.1秒更新一次：
from threading import Thread
from time import sleep
self.updateGUIThread = Thread(target=self.updateGUI)
def updateGUI(self):
while self.updateNeeded
root.update()
sleep(0.1)
大函数完成后，您可以将self.updateNeeded设置为False。