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Articles by Niharika Aitam
Page 7 of 14
Priority Queue using Queue and Heapdict module in Python
The priority Queue is the abstract data type which is similar to the queue or stack, in which each element is attached with a priority. Here the priority determines the order of the elements to be dequeued from the queue and the higher priority elements are dequeued before the elements with the lower priority. The priority queues will be implemented using different data structures such as heaps, arrays or balanced trees. The most commonly used implementation is the heap, which is the binary tree based data structure having the value of each node greater than or equal to the values ...
Read MoreHow to check for a substring in a PySpark dataframe?
Pyspark is the library which provides the interface to Apache spark. The Apache spark is the distributed computing system to process the large datasets. We have the feasibility in pyspark to write the spark applications using python apart of the traditional languages Java and Scala. Verifying for a substring in a PySpark Pyspark provides the dataframe API which helps us in manipulating the structured data such as the SQL queries. It can read various formats of data like parquet, csv, JSON and much more. It provides the features to support the machine learning library to use classification, regression, ...
Read MoreHow to check horoscope using Python?
Checking horoscope using Python Python is used in many applications all over the world. One of the applications is to check the horoscope on that day or day after using the Beautifulsoup of the python language. The following are the steps to be followed to check the horoscope using python. Installing the beautifulsoup Firstly, we have to install the beautifulsoup package in our python working envinornment. The below is the code. pip install bs4 The output of installing the beautifulsoup is as follows. Collecting bs4 Downloading bs4-0.0.1.tar.gz (1.1 kB) Preparing metadata (setup.py): started ...
Read MoreHow to check if the PyMongo Cursor is Empty?
PyMongo is one of the libraries in python which provides a way to interact with the MongoDB , the most popular NoSQL document oriented database. It allows the developers to easily connect with the mongoDB instances and interact with the databases and collections, insert and retrieve the documents and other various operations. Cursors in PyMongo A cursor in MongoDB is an object that points to the documents. When we execute the find() method by passing a search query as a parameter, the results of the given query are returned in the form of a cursor object. By iterating ...
Read MoreHow to check whether user\'s internet is on or off using Python?
Generally, if you need to verify whether your current system is connected to the internet or not, we can do so, by simply sending request to any of webserver application using the browser or, using the dos command ping. The ping command is typically used to troubleshoot connectivity, reachability, and name resolution. Similarly, in Python we can verify the user’s internet connectivity status either by sending a request to any web application or by using the ping command. Using the request.get() method In python, the modules request helps us to send HTTP requests using Python. By sending requests ...
Read MoreHow to click a href link from bootstrap tabs using Python?
Bootstrap is the popular HTML, CSS, JavaScript framework which helps us to develop responsive, mobile first, front end web applications. It provides design templates for forms, typography, navigation, buttons and other interface components. Python is the best language to manipulate the web content. The Selenium Library If we need to click a link using Python programming we should use the selenium library. It is the most popular open source automation testing tool which allows us to make the web browsers automate. Selenium is mainly used for the testing purpose of the automated web applications and also used for other ...
Read MoreHow to clone webpage using pywebcopy in python?
Python provides Pywebcopy module, that allows us to download and store the entire website including all the images, HTML pages and other files to our machine. In this module, we have one of the functions namely save_webpage() which allows us to clone the webpage. Installing pywebcopy module Firstly, we have to install the pywebcopy module in the python environment using the following code. pip install pywebcopy On successful installation we will get the following output – Looking in indexes: https://pypi.org/simple, https://us-python.pkg.dev/colab-wheels/public/simple/ Collecting pywebcopy Downloading pywebcopy-7.0.2-py2.py3-none-any.whl (46 kB) . . ...
Read MoreHow to communicate JSON data between Python and Node.js?
JSON can be abbreviated as JavaScript Object Notation. It is a text-based file used for transferring and storing data in programming languages. It is supported by the python programming language using a built-in package namely JSON, Its text is given in the quoted string format in which contains a key and value within the curly braces{} as same as a dictionary. For using JSON in python, we have to import the JSON package in python script. JSON package provides several methods, among them one of the methods is dumps. This is used to convert the python tuple objects into ...
Read MoreHow to Color Scatterplot by a variable in Matplotlib?
There are several ways to color scatterplot by a variable in Matplotlib of the python library. We have three parameters in scatter function namely cmap, alpha and c using which we can change the color of the plot. Matplotlib is one of the libraries available in python which is used to plot and visualize the given data. This can be used as the extension of the Numpy library to plot the arrays. This library has the module called pyplot which makes the visualization and plotting the data very easy. This pyplot module has many functions and parameters which ...
Read MoreHow to choose elements from the list with different probability using NumPy?
There are multiple ways to choose elements from the list with the different probability using the numpy library. In python, NumPy library provides a module named random, which has several functions such as choice(), multinomial() etc., which are used to choose elements from an array with different probabilities. The sum of all probability values defined in the list should be equal to 1. Let’s see each way one by one. Using the random.choice() function The random module provides the function choice(), which is used to calculate a random sample from the given 1-d array with the specified probability distribution. ...
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