Sentiment Analysis is the process of estimating the sentiment of people who give feedback to certain event either through written text or through oral communication. Of course the oral communication also has to be converted to written text so that it can be analysed through python program. The sentiment expressed by people may be positive or negative. By assigning weightage to the different words in the sentiment text we calculate a numeric value and that gives us a mathematical evaluation of the sentiment.UsefulnessCustomer Fedback − It is vital for business to know the customer’s opinion about product or services. When ... Read More

In Python deque is a data structure like stack and queue. It allows append and pop operations from both the ends of the queue. And that makes it different from the rest of the data structures. There are various operations which are listed below that is applicable to deque. In this article we will see the examples on each of those operations. The collections module is used to implement deque.Deque OperationsBelow are some of the useful operations carried out using dequeappend() − This function is used to insert the value in its argument to the right end of deque.appendleft() − ... Read More

As part of data processing activity we sometimes need to append one string with another. In this article we will see how to append dynamic number of zeros to a given string. This can be done by using various string functions as shown in the programs below.Using ljust and lenPython string method ljust() returns the string left justified in a string of length width. Padding is done using the specified fillchar (default is a space). The len() returns the length of the string. We add trailing zeros to the string by manipulating the length of the given string and the ... Read More

In this tutorial, we will learn about the multi-threading in Python. It helps us to perform multiple tasks at a time. Python has a module called threading for multitasking.We see how it works by writing data to a file in the background while calculating the sum of elements in a list. Let's see the steps involved in the program.Import the threading module.Create a class by inheriting threading.Thread class.Write the file code inside the run method in the above class.Initialize the required data.Write the code to calculate the sum of numbers in a list.Example# importing the modules import threading # creating ... Read More

We know docstring gives extra information about the function and classes in Python. We can also use it for testing of the functions using the doctest module. The doctest modules execute the code which starts with >>> and compares it against the expected output.Follow the below steps to write a function with doctest.Import the doctest module.Write the function with docstring. Inside the docstring, write the following two lines for testing of the same function.>>>function_name(*args).Expected output.Write the function code.Now, call the doctest.testmod(name=function_name, verbose=True) function for testing. We can't see the test results if the verbose set to False and all tests ... Read More

In this tutorial, we are going to find the sum of a 2D array using map function in Python.The map function takes two arguments i.e., function and iterable. It passes every element of the iterable to the function and stores the result in map object. We can covert the map object into an iterable.Let's see how to find the sum of the 2D array using the map function.Initialize the 2D array using lists.Pass the function sum and 2D array to the map function.Find the sum of resultant map object and print it.ExampleSee the code below. Live Demo# initializing the 2D array ... Read More

In this tutorial, we are going to create a simple GUI calculator using the Tkinter module. Tkinter is builtin the Python module for developing the GUI application. It's easy to use and comes with Python. We can visualize our data with GUI applications.Let's see how to create a simple GUI calculator.Import everything from the Tkinter using *.Create an interface for the calculator.Create an input function that enters a number into the input field.Create an apparent function that wipes everything from the input field.And finally, evaluate function that computes and gives the result of the expression.Example# importing everyting from tkinter from tkinter import * ... Read More

In this tutorial, we are going to learn how to create a run-length encoding in Python. Given a string return a new string containing char and frequency.For example, the string tutorialspoint will be encoded as t3u1o2r1i2a1l1s1p1n1. The order is every char+frequency. Join all of them and return. See the steps below to write the program.Write the function with the name run_length_encoding.Initialize a dictionary with OrderedDict to get an initial count of chars as 0.Iterate over every character of the string and increment the count in the dictionary.Join all the chars and their frequencies. And print it.Initialize the strings and invoke ... Read More

In this tutorial, we are going to write a program that checks whether a string contains any special character or not. It's straightforward in Python.We will have a set of special characters in the string module. We can use that one to check whether a string contains any special characters or not. Let's see the steps to write the program.Import the string module.Store the special characters from string.punctuation in a variable.Initialize a string.Check whether the string has special characters or not using the map function.Print the result, whether valid or not.Example# importing the string module import string # special characters ... Read More

Sometimes you want to accept input based on certain conditions. Here, we are going to see the same type of program. We will write a program that allows only words with vowels. We will show them whether the input is valid or not.Let's see the approach step by step.Define a list of vowels [A, E, I, O, U, a, e, i, o, u]Initialize a word or sentence.Iterate over the word or sentence.Check if it is present in the list or not.      3.1.1. If not, break the loop and print Not accepted.Else print acceptedExampleLet's convert the text into Python ... Read More