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python - 无法让计数器在 tweepy 中工作

问题描述

from tweepy import OAuthHandler

import tweepy
from tweepy import StreamListener
from tweepy import Stream


import time



consumer_key = 'super secret consumer key'
consumer_secret = 'shhhhh can't tell anyone this!'
access_token = 'hmmmmmmmmmmmmm'
access_secret = 'arrays should start at 0'

auth = OAuthHandler(consumer_key, consumer_secret)
auth.set_access_token(access_token, access_secret)

api = tweepy.API(auth)
print('')
print('starting...')
time.sleep(3)

class MySteamListener(tweepy.StreamListener):







    def on_status(self, status):
        #prints status text. can be replaced with a counter probably.
        counter = counter + 1
        print(status.text)


    def on_error(self, status_code):
        if status_code == 420:
            print('420 error')
            #Ends stream in case of rate limiting
            return False


mySteamListener = MySteamListener()

myStream = tweepy.Stream(auth = api.auth, listener = mySteamListener)

myStream.filter(track = ['Warriors'])

我是 tweepy 的新手，我要做的第一件事是制作一个程序，扫描所有推文中的某些单词。在我尝试为该单词的实例数添加一个计数器之前，一切都运行良好。无论我在哪里分配计数器，我总是得到一个“UnboundLocalError：分配前引用的局部变量”计数器“错误。在这个程序中我应该在哪里分配计数器？

标签： pythontweepy

解决方案

假设上面的“不能”实际上不在您的代码中，如果可能，请更新您的问题以省略“'”，因为它会破坏可读性或更改为其他一些占位符文本。

如错误所示，您尚未为计数器分配值，方法“on_status”将尝试增加计数器，但这只是方法的本地，而不是对象，因此它失败了。

def on_status(self, status):
        #prints status text. can be replaced with a counter probably.
        counter = counter + 1
        print(status.text)

您应该在init方法中初始化计数器，然后改用 self.counter。

添加

...
class MySteamListener(tweepy.StreamListener):

    def __init__(self):
        # Not sure if necessary, to make this work, but you could
        # Initialize the inherited class as well (this may work only in Python 3)
        # super().__init__()
        self.counter = 0
...

修改 on_status 为

def on_status(self, status):
        #prints status text. can be replaced with a counter probably.
        self.counter = self.counter + 1
        # Can be written as 'self.counter += 1'
        print(status.text)

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