将 Flask 与 Matplotlib 集成失败

Question

我正在处理我的 twitter 情绪分析器项目。我正在使用 matplotlib 来绘制响应。我想创建一个用户友好的界面页面，它将从用户那里获取输入（主题或标签）并将其发送到分析器，分析器将分析它们并在 matplotlib 中生成图形。我成功地从终端输入。但是现在与烧瓶集成后它不起作用。

我的 main.py

import sys,tweepy,csv,re
from textblob import TextBlob
import matplotlib.pyplot as plt

class SentimentAnalysis:

    def __init__(self):
        self.tweets = []
        self.tweetText = []

    def DownloadData(self, topic, count):
        # authenticating
        consumerKey = 'CKEY'
        consumerSecret = 'CSEC'
        accessToken = 'ATOK'
        accessTokenSecret = 'ASEC'
        auth = tweepy.OAuthHandler(consumerKey, consumerSecret)
        auth.set_access_token(accessToken, accessTokenSecret)
        api = tweepy.API(auth)

        # input for term to be searched and how many tweets to search
        searchTerm = topic
        NoOfTerms = count

        # searching for tweets
        self.tweets = tweepy.Cursor(api.search, q=searchTerm, lang = "en").items(NoOfTerms)

        # Open/create a file to append data to
        csvFile = open('result.csv', 'a')

        # Use csv writer
        csvWriter = csv.writer(csvFile)


        # creating some variables to store info
        polarity = 0
        positive = 0
        wpositive = 0
        spositive = 0
        negative = 0
        wnegative = 0
        snegative = 0
        neutral = 0


        # iterating through tweets fetched
        for tweet in self.tweets:
            #Append to temp so that we can store in csv later. I use encode UTF-8
            self.tweetText.append(self.cleanTweet(tweet.text).encode('utf-8'))
            # print (tweet.text.translate(non_bmp_map))    #print tweet's text
            analysis = TextBlob(tweet.text)
            # print(analysis.sentiment)  # print tweet's polarity
            polarity += analysis.sentiment.polarity  # adding up polarities to find the average later

            if (analysis.sentiment.polarity == 0):  # adding reaction of how people are reacting to find average later
                neutral += 1
            elif (analysis.sentiment.polarity > 0 and analysis.sentiment.polarity <= 0.3):
                wpositive += 1
            elif (analysis.sentiment.polarity > 0.3 and analysis.sentiment.polarity <= 0.6):
                positive += 1
            elif (analysis.sentiment.polarity > 0.6 and analysis.sentiment.polarity <= 1):
                spositive += 1
            elif (analysis.sentiment.polarity > -0.3 and analysis.sentiment.polarity <= 0):
                wnegative += 1
            elif (analysis.sentiment.polarity > -0.6 and analysis.sentiment.polarity <= -0.3):
                negative += 1
            elif (analysis.sentiment.polarity > -1 and analysis.sentiment.polarity <= -0.6):
                snegative += 1


        # Write to csv and close csv file
        csvWriter.writerow(self.tweetText)
        csvFile.close()

        # finding average of how people are reacting
        positive = self.percentage(positive, NoOfTerms)
        wpositive = self.percentage(wpositive, NoOfTerms)
        spositive = self.percentage(spositive, NoOfTerms)
        negative = self.percentage(negative, NoOfTerms)
        wnegative = self.percentage(wnegative, NoOfTerms)
        snegative = self.percentage(snegative, NoOfTerms)
        neutral = self.percentage(neutral, NoOfTerms)

        # finding average reaction
        polarity = polarity / NoOfTerms

        # printing out data
        print("How people are reacting on " + searchTerm + " by analyzing " + str(NoOfTerms) + " tweets.")
        print()
        print("General Report: ")

        if (polarity == 0):
            print("Neutral")
        elif (polarity > 0 and polarity <= 0.3):
            print("Weakly Positive")
        elif (polarity > 0.3 and polarity <= 0.6):
            print("Positive")
        elif (polarity > 0.6 and polarity <= 1):
            print("Strongly Positive")
        elif (polarity > -0.3 and polarity <= 0):
            print("Weakly Negative")
        elif (polarity > -0.6 and polarity <= -0.3):
            print("Negative")
        elif (polarity > -1 and polarity <= -0.6):
            print("Strongly Negative")

        print()
        print("Detailed Report: ")
        print(str(positive) + "% people thought it was positive")
        print(str(wpositive) + "% people thought it was weakly positive")
        print(str(spositive) + "% people thought it was strongly positive")
        print(str(negative) + "% people thought it was negative")
        print(str(wnegative) + "% people thought it was weakly negative")
        print(str(snegative) + "% people thought it was strongly negative")
        print(str(neutral) + "% people thought it was neutral")

        self.plotPieChart(positive, wpositive, spositive, negative, wnegative, snegative, neutral, searchTerm, NoOfTerms)


    def cleanTweet(self, tweet):
        # Remove Links, Special Characters etc from tweet
        return ' '.join(re.sub("(@[A-Za-z0-9]+)|([^0-9A-Za-z \t]) | (\w +:\ / \ / \S +)", " ", tweet).split())

    # function to calculate percentage
    def percentage(self, part, whole):
        temp = 100 * float(part) / float(whole)
        return format(temp, '.2f')

    def plotPieChart(self, positive, wpositive, spositive, negative, wnegative, snegative, neutral, searchTerm, noOfSearchTerms):
        labels = ['Positive [' + str(positive) + '%]', 'Weakly Positive [' + str(wpositive) + '%]','Strongly Positive [' + str(spositive) + '%]', 'Neutral [' + str(neutral) + '%]',
                  'Negative [' + str(negative) + '%]', 'Weakly Negative [' + str(wnegative) + '%]', 'Strongly Negative [' + str(snegative) + '%]']
        sizes = [positive, wpositive, spositive, neutral, negative, wnegative, snegative]
        colors = ['yellowgreen','lightgreen','darkgreen', 'gold', 'red','lightsalmon','darkred']
        patches, texts = plt.pie(sizes, colors=colors, startangle=90)
        plt.legend(patches, labels, loc="best")
        plt.title('How people are reacting on ' + searchTerm + ' by analyzing ' + str(noOfSearchTerms) + ' Tweets.')
        plt.axis('equal')
        plt.tight_layout()
        plt.show()

我的 app.py

from main import SentimentAnalysis
from flask import Flask, render_template,request

sa = SentimentAnalysis()
app = Flask(__name__)

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/submit', methods = ['GET', 'POST'])
def submit():
    if request.method == 'POST':
        #Parse form data    
        topic = request.form['topic']
        count = request.form['count']

        return sa.DownloadData(topic, count)

if __name__ == "__main__":
    app.run(debug=True)

现在我根本没有得到任何回应。谁能告诉我哪里错了？

Answer 1

您想创建一个特定的类来从某个模板中获取数据.. 比如，使用 wtforms...

from flask import *
from wtforms import *

class getData(Form):

    topic = StringField('topic: ',[validators.Length(min= 1, max=20)])
    count = IntegerField('Number') #maybe I missed here something

将这些字段渲染到模板中。然后就可以获取数据了。 通过使用：

x = getData(request.form)

to = x.topic.data 

或者干脆按照here的描述做