我正在尝试编写一个小型 python 应用程序，使用PySide作为 GUI 和Twython作为 Twitter API 库，以捕获来自 Twitter 的流。
我遇到的问题是，当我单击“开始监控 Twitter”按钮时，UI 会冻结，直到流完成，此时代码继续执行并禁用“开始”按钮并启用“停止”按钮。这是用户界面：
其他一切似乎都正常工作——如果我离开它，那么我怀疑会创建 CSV 文件——Twython 组件似乎按预期工作。
第 151 行是当我单击开始时从 Twitter 流式传输的位置：
self.stream.statuses.filter(track=self.search_term)
如何将流式传输移动到单独的线程，然后使用 UI 上的停止按钮告诉 Twython 完成捕获流并退出？
我需要能够将MyStreamer实例发送到另一个线程，然后向它发送.disconnect()信号以使其终止捕获流。
这是完整的代码：
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import platform
import PySide
from PySide.QtGui import QApplication, QMainWindow, QPushButton, QCheckBox, QTextEdit
from time import sleep
from ui_tweetstream import Ui_MainWindow
from twython import Twython
from twython import TwythonStreamer
import csv
class MainWindow(QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
# Set up Variables
self.tweet_fav_count = True
self.tweet_geocoordinates = True
self.tweet_id = True
self.tweet_language = True
self.tweet_orig_tweet_id = True
self.tweet_orig_username = True
self.tweet_retweeted = True
self.tweet_sensitive = True
self.tweet_source_app = True
self.tweet_timestamp = True
self.tweet_user_name = True
self.search_term = "#bigdata"
self.tweets_to_get = 1000
# Bind the interface
self.check_tweet_fav_count.clicked.connect(self.setTweetFavCount)
self.check_tweet_geocoordinates.clicked.connect(self.setTweetGeocoordinates)
self.check_tweet_id.clicked.connect(self.setTweetID)
self.check_tweet_language.clicked.connect(self.setTweetLanguage)
self.check_tweet_orig_tweet_id.clicked.connect(self.setTweetOrigTweetID)
self.check_tweet_orig_username.clicked.connect(self.setTweetOrigUsername)
self.check_tweet_retweeted.clicked.connect(self.setTweetRetweeted)
self.check_tweet_sensitive.clicked.connect(self.setTweetSensitive)
self.check_tweet_source_app.clicked.connect(self.setTweetSourceApp)
self.check_tweet_timestamp.clicked.connect(self.setTweetTimestamp)
self.check_tweet_user_name.clicked.connect(self.setTweetUsername)
self.button_start.clicked.connect(self.streamStart)
self.button_stop.clicked.connect(self.streamStop)
# Set the initial states
self.button_stop.setEnabled(False)
APP_KEY = ''
APP_SECRET = ''
OAUTH_TOKEN = ''
OAUTH_TOKEN_SECRET = ''
self.t = Twython(APP_KEY, APP_SECRET, OAUTH_TOKEN, OAUTH_TOKEN_SECRET)
self.stream = MyStreamer(APP_KEY,APP_SECRET,OAUTH_TOKEN,OAUTH_TOKEN_SECRET)
self.stream.init_mainWindow(self)
def streamStop(self):
print "Stopping stream"
# Enable other controls here
self.button_stop.setEnabled(False)
self.button_start.setEnabled(True)
self.setControlStates(True)
self.stream.stopStream()
def setControlStates(self, state):
self.check_tweet_fav_count.setEnabled(state)
self.check_tweet_geocoordinates.setEnabled(state)
self.check_tweet_id.setEnabled(state)
self.check_tweet_language.setEnabled(state)
self.check_tweet_orig_tweet_id.setEnabled(state)
self.check_tweet_orig_username.setEnabled(state)
self.check_tweet_retweeted.setEnabled(state)
self.check_tweet_sensitive.setEnabled(state)
self.check_tweet_source_app.setEnabled(state)
self.check_tweet_timestamp.setEnabled(state)
self.check_tweet_user_name.setEnabled(state)
self.search_box.setEnabled(state)
self.num_tweets_box.setEnabled(state)
# Functions for determining what to track
def setTweetFavCount(self):
self.tweet_fav_count = not self.tweet_fav_count
print "tweet_fav_count:", self.tweet_fav_count
def setTweetGeocoordinates(self):
self.tweet_geocoordinates = not self.tweet_geocoordinates
print "tweet_geocoordinates:", self.tweet_geocoordinates
def setTweetID(self):
self.tweet_id = not self.tweet_id
print "tweet_id:", self.tweet_id
def setTweetLanguage(self):
self.tweet_language = not self.tweet_language
print "tweet_language:", self.tweet_language
def setTweetOrigTweetID(self):
self.tweet_orig_tweet_id = not self.tweet_orig_tweet_id
print "tweet_orig_tweet_id:", self.tweet_orig_tweet_id
def setTweetOrigUsername(self):
self.tweet_orig_username = not self.tweet_orig_tweet_id
print "tweet_orig_username:", self. tweet_orig_username
def setTweetRetweeted(self):
self.tweet_retweeted = not self.tweet_retweeted
print "tweet_retweeted:", self.tweet_retweeted
def setTweetSensitive(self):
self.tweet_sensitive = not self.tweet_sensitive
print "tweet_sensitive:", self.tweet_sensitive
def setTweetSourceApp(self):
self.tweet_source_app = not self.tweet_source_app
print "tweet_source_app:", self.tweet_source_app
def setTweetTimestamp(self):
self.tweet_timestamp = not self.tweet_timestamp
print "tweet_timestamp:", self.tweet_timestamp
def setTweetUsername(self):
self.tweet_user_name = not self.tweet_user_name
print "tweet_user_name:", self.tweet_user_name
# Functions for starting and stopping the stream
def streamStart(self):
print "Starting stream"
self.setControlStates(False)
# Disable other controls here
self.button_start.setEnabled(False)
self.button_stop.setEnabled(True)
# Hack to try to disable the UI
# sleep(0.25)
# Get the active search term
self.search_term = self.search_box.text()
# Get the number of tweets
self.tweets_to_get = int(self.num_tweets_box.text())
# Set the streamer
self.stream.set_start_criteria(self.tweets_to_get)
self.stream.statuses.filter(track=self.search_term)
class MyStreamer(TwythonStreamer):
def init_mainWindow(self, the_main_window):
self.main_window = the_main_window
self.stop = False
self.header_done = False
def set_start_criteria(self, numTweets):
self.maxTweets = numTweets
self.tweetCount = 0
print "Number of tweets to get:", self.maxTweets
def stopStream(self):
self.stop = True
def on_success(self, data):
if 'text' in data:
self.tweetCount += 1
print "tweetCount:", self.tweetCount
#tweet = data['text'].encode('utf-8')
theTweet = data
writer = TweetMonkey()
writer.assignMainWindow(self.main_window, self.header_done)
self.header_done = True
writer.process(theTweet)
# Want to disconnect after the first result?
if self.stop is True or self.tweetCount >= self.maxTweets:
self.disconnect()
def on_error(self, status_code, data):
print status_code, data
class TweetMonkey:
def assignMainWindow(self,the_main_window, is_header_done):
self.main_window = the_main_window
self.header_done = is_header_done
def clean(self,text):
text = text.replace("\n","; ")
text = text.replace('"', "'")
text = text.replace(','," ")
return text
def create_header(self):
header = []
tweets = open("tweets.csv", 'ab+')
wr = csv.writer(tweets, dialect='excel')
if self.main_window.tweet_id is True:
header.append("id")
if self.main_window.tweet_language is True:
header.append("lang")
if self.main_window.tweet_user_name is True:
header.append("user_name")
header.append("tweet")
if self.main_window.tweet_retweeted is True:
header.append("retweeted")
if self.main_window.tweet_fav_count is True:
header.append("favorite_count")
if self.main_window.tweet_source_app is True:
header.append("source")
if self.main_window.tweet_orig_tweet_id is True:
header.append("in_reply_to_status_id")
if self.main_window.tweet_orig_username is True:
header.append("in_reply_to_screen_name")
# header.append("in_reply_to_user_id")
if self.main_window.tweet_sensitive is True:
header.append("possibly_sensitive")
if self.main_window.tweet_geocoordinates is True:
header.append("geo")
if self.main_window.tweet_timestamp is True:
header.append("created_at")
wr.writerow(header)
tweets.close()
def process(self, tweet):
if not self.header_done:
self.create_header()
self.header_done = True
# Create the file or append to the existing
theOutput = []
tweets = open("tweets.csv", 'ab+')
wr = csv.writer(tweets, dialect='excel')
if self.main_window.tweet_id is True:
theOutput.append(tweet['id'])
if self.main_window.tweet_language is True:
theOutput.append(tweet['lang'].encode('utf-8'))
if self.main_window.tweet_user_name is True:
theOutput.append(tweet['user']['name'].encode('utf-8', 'replace'))
theOutput.append(self.clean(tweet['text']).encode('utf-8', 'replace'))
if self.main_window.tweet_retweeted is True:
theOutput.append(tweet['retweeted'])
if self.main_window.tweet_fav_count is True:
theOutput.append(tweet['favorite_count'])
if self.main_window.tweet_source_app is True:
theOutput.append(self.clean(tweet['source']).encode('utf-8', 'replace'))
if self.main_window.tweet_orig_tweet_id is True:
theOutput.append(tweet['in_reply_to_status_id'])
if self.main_window.tweet_orig_username is True:
theOutput.append(tweet['in_reply_to_screen_name'])
#theOutput.append(tweet['in_reply_to_user_id'])
if self.main_window.tweet_sensitive is True:
if tweet.get('possibly_sensitive'):
theOutput.append(tweet['possibly_sensitive'])
else:
theOutput.append("False")
if self.main_window.tweet_geocoordinates is True:
if tweet['geo'] is not None:
if tweet['geo']['type'] == 'Point':
lat = str(tweet['geo']['coordinates'][0]) + " "
lon = str(tweet['geo']['coordinates'][1])
theOutput.append(lat + lon)
else:
theOutput.append(tweet['geo'])
else:
theOutput.append(tweet['geo'])
if self.main_window.tweet_timestamp is True:
theOutput.append(tweet['created_at'])
wr.writerow(theOutput)
tweets.close()
if __name__ == '__main__':
app = QApplication(sys.argv)
frame = MainWindow()
frame.show()
app.exec_()