Text detection using Python

14 Sep, 2021
Python language is widely used for modern machine learning and data analysis. One can detect an image, speech, can even detect an object through Python. For now, we will detect whether the text from the user gives a positive feeling or negative feeling by classifying the text as positive, negative, or neutral. In the code, Vader sentiment analysis and Tkinter are used. Tkinter is a standard GUI library for creating the GUI application.
Required Installations in Anaconda: 
tkinter: This module is used for creating a simple GUI application. This module generally comes pre-installed with Python but to install it externally type the below command in the terminal. Using conda command.
conda install -c anaconda tk
Linux users can also use the below command. 
sudo apt-get install python3-tk
nltk: This module is used for making computers understand the natural language. To install it type the below command in the terminal.Using conda.
conda install -c anaconda nltk
Using pip. 
pip install nltk
numpy: This module is the fundamental package for scientific computing with Python. To install it type the below command in the terminal.Using conda.
conda install -c conda-forge numpy
Using pip. 
pip install numpy
pandas: This module is used for data analysis. It provides highly optimized performance with back-end source code is purely written in C or Python. To install it type the below command in the terminal.Using conda
conda install -c anaconda pandas
Using pip. 
pip install pandas
matplotlib: This module is an amazing visualization library in Python for 2D plots of arrays. Matplotlib is a multi-platform data visualization library built on NumPy arrays. To install it type the below command in the terminal.Using conda.
conda install -c conda-forge matplotlib
Using pip. 
pip install matplotlib
VADER (Valence Aware Dictionary and sEntiment Reasoner) is a lexicon and rule-based sentiment analysis tool that is specifically attuned to sentiments expressed in social media. VADER uses a combination of A sentiment lexicon is a list of lexical features (e.g., words) which are generally labeled according to their semantic orientation as either positive or negative. VADER not only tells about the Positivity and Negativity score but also tells us about how positive or negative a sentiment is.
Note: For more information, refer to Python | Sentiment Analysis using VADER.
Below is the implementation.
Python3
import timeimport pandas as pdimport numpy as npimport matplotlib.pyplot as pltfrom tkinter import *import tkinter.messageboxfrom nltk.sentiment.vader import SentimentIntensityAnalyzer       class analysis_text():         # Main function in program    def center(self, toplevel):                 toplevel.update_idletasks()        w = toplevel.winfo_screenwidth()        h = toplevel.winfo_screenheight()        size = tuple(int(_) for _ in                     toplevel.geometry().split('+')[0].split('x'))                 x = w/2 - size[0]/2        y = h/2 - size[1]/2        toplevel.geometry("%dx%d+%d+%d" % (size + (x, y)))      def callback(self):        if tkinter.messagebox.askokcancel("Quit",                                          "Do you want to leave?"):            self.main.destroy()      def setResult(self, type, res):                 #calculated comments in vader analysis        if (type == "neg"):            self.negativeLabel.configure(text =                                         "you typed negative comment : "                                         + str(res) + " % \n")        elif (type == "neu"):            self.neutralLabel.configure( text =                                        "you typed  comment : "                                        + str(res) + " % \n")        elif (type == "pos"):            self.positiveLabel.configure(text                                        = "you typed positive comment: "                                         + str(res) + " % \n")               def runAnalysis(self):                 sentences = []        sentences.append(self.line.get())        sid = SentimentIntensityAnalyzer()                 for sentence in sentences:                         # print(sentence)            ss = sid.polarity_scores(sentence)                         if ss['compound'] >= 0.05 :                self.normalLabel.configure(text =                                           " you typed positive statement: ")                elif ss['compound'] <= - 0.05 :                self.normalLabel.configure(text =                                           " you typed negative statement")                else :             self.normalLabel.configure(text =                                        " you normal typed  statement: ")            for k in sorted(ss):                self.setResult(k, ss[k])        print()               def editedText(self, event):        self.typedText.configure(text = self.line.get() + event.char)               def runByEnter(self, event):        self.runAnalysis()       def __init__(self):        # Create main window        self.main = Tk()        self.main.title("Text Detector system")        self.main.geometry("600x600")        self.main.resizable(width=FALSE, height=FALSE)        self.main.protocol("WM_DELETE_WINDOW", self.callback)        self.main.focus()        self.center(self.main)          # addition item on window        self.label1 = Label(text = "type a text here :")        self.label1.pack()          # Add a hidden button Enter        self.line = Entry(self.main, width=70)        self.line.pack()          self.textLabel = Label(text = "\n",                               font=("Helvetica", 15))        self.textLabel.pack()        self.typedText = Label(text = "",                               fg = "blue",                               font=("Helvetica", 20))        self.typedText.pack()          self.line.bind("<Key>",self.editedText)        self.line.bind("<Return>",self.runByEnter)            self.result = Label(text = "\n",                            font=("Helvetica", 15))        self.result.pack()        self.negativeLabel = Label(text = "",                                   fg = "red",                                   font=("Helvetica", 20))        self.negativeLabel.pack()        self.neutralLabel  = Label(text = "",                                   font=("Helvetica", 20))        self.neutralLabel.pack()        self.positiveLabel = Label(text = "",                                   fg = "green",                                   font=("Helvetica", 20))        self.positiveLabel.pack()        self.normalLabel =Label (text ="",                                 fg ="red",                                 font=("Helvetica", 20))        self.normalLabel.pack()         # Driver codemyanalysis = analysis_text()mainloop()
Output:
 
surindertarika1234
rajeev0719singh
Python Tkinter-exercises
Python-nltk
Python-tkinter
Python
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