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In this article, we will show you when we use the crosstab() and pivot_table() functions in Python Pandas. When to use crosstab or pivot_table The pivot table expects your input data to already be a DataFrame; you pass a DataFrame to the pivot table and specify the index/columns/values by passing the column names as strings. You don't need to pass a DataFrame into a cross tab because you just pass arraylike objects for index/columns/values. In general, use a pivot table if you already have a DataFrame so you don't have to create the same DataFrame twice. Use crosstab if you ... Read More
Python is a powerful general-purpose interpreted programming language. In this article, we will go over how to prepare for a Python developer job interview by going over some of the major topics you must prepare for. Steps to Prepare for Python Interview 1)Review Data Structures and Algorithms(DSA) in Python if you haven’t already You should be able to compare and contrast simple Python data structures with other language abstract data structures, as well as explain how you can enforce stack features using existing Python data structures such as lists, or do a custom implementation of a class such as a ... Read More
In this article, we will show you the differences between dataframe and matrices in python pandas. Both dataframes and matrices are 2-dimensional data structures. In general, dataframes can include multiple types of data (numeric, character, factor, etc) while matrices can only store one type of data. Dataframe in Python In Python, a DataFrame is a two-dimensional, tabular, mutable data structure that may store tabular data containing objects of various data types. A DataFrame has axes that are labeled in the form of rows and columns. DataFrames are useful tools in data preprocessing because they provide valuable data handling methods. DataFrames ... Read More
In this article, we will look at some examples of runtime errors in Python Programming Language Runtime Errors A runtime error in a program is one that occurs after the program has been successfully compiled. The Python interpreter will run a program if it is syntactically correct (free of syntax errors). However, if the program encounters a runtime error - a problem that was not detected when the program was parsed and is only revealed when a specific line is executed - it may exit unexpectedly during execution. When a program crashes due to a runtime error, we say ... Read More
In this tutorial, we will learn to set how many columns an element should span across with JavaScript. Dividing long paragraphs or articles into many columns improves their readability. The ‘column-count’ CSS property divides the text into numerous columns. Set the columnSpan property to all if you want the columns to span across in JavaScript. To set how many columns an element should span across with JavaScript, we have multiple ways, and in this tutorial, we will discuss two of them − Set the columnSpan property Use the style.setProperty method Set the columnSpan Property In JavaScript, the columnSpan ... Read More
In this tutorial, we will learn if it is a good practice to end switch with defaults in JavaScript. In JavaScript, we generally use the if or if-else statements if we need to check any conditions. Still, if we need to check multiple conditions for an expression, it becomes very complex and unorganized, so we use the switch statements for that situation. The switch statement compares the value of an expression to a series of case clauses, then executes statements after the first case clause that matches the value, and so on, until a break statement is met. If no ... Read More
In this tutorial, we will learn how to work with document.body in JavaScript. Use the document.body property in JavaScript to get the body of the document, i.e., tag. The tag defines the body of the document. The entire content of an HTML document, including all headings, paragraphs, images, hyperlinks, tables, lists, and other elements, is contained in the element. In an HTML document, there can only be one element. In this tutorial, we will work with the document.body in JavaScript for − Change the background color of the body Add a new element at the ... Read More
In this tutorial, we will learn how to validate a date pattern in JavaScript. The Date object in JavaScript represents a single point in time in a platform-independent way. It carries a number representing time in milliseconds since January 1, 1970, at 00:00:00. (UTC). The Date object can format differently, so it is essential to validate a date pattern before using it. In this tutorial, we will discuss two ways to validate a date pattern in JavaScript − Using the getTime() method Using the Date constructor and split() method Validate a Date Pattern using the getTime() Method In ... Read More
In this tutorial, we will learn how to use the tag to define client-side JavaScript. The HTML tag is used for declaring a script within your HTML document. Through this, you can define client-side JavaScript. Users can write the client-side JavaScript code directly in the script tag, or the script tag can be pointed to an external JavaScript file using the ‘src’ attribute. The client-side JavaScript can be written in multiple parts of the HTML file, such as inside the body tag, head tag, or inline of an element tag. Still, writing any JavaScript code in between the ... Read More
In this tutorial, we will learn how to use setInterval function call in JavaScript. The setInterval() method in JavaScript evaluates an expression at intervals. It is used to perform the repetitive tasks or operations that need to be performed in a specific time interval. For example, it calls a function repeatedly in a fixed time delay to perform the task. The window interface offers this method. This method returns an interval id that uniquely identifies the interval, allowing you to remove it later by executing the clearInterval() method. Users can follow the below syntax to use the setInterval function. Syntax ... Read More