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Why we write #!/usr/bin/env python on the first line of a Python script? The shebang line or hashbang line is recognized as the line #!/usr/bin/env python. This helps to point out the location of the interpreter intended for executing a script, especially in Unix-like operating systems. For example, Linux and macOS are Unix-like operating systems whose executable files normally start with a shebang followed by a path to 2 min read Python Bin | Count total bits in a number Given a positive number n, count total bit in it. Examples: Input : 13 Output : 4 Binary representation of 13 is 1101 Input : 183 Output : 8 Input : 4096 Output : 13 We have existing solution for this problem please refer Count total bits in a number link. Approach#1: We can solve this problem quickly in Python using bin() function. Convert number 3 min read bin() in Python Python bin() function returns the binary string of a given integer. bin() function is used to convert integer to binary string. In this article, we will learn more about Python bin() function. Example In this example, we are using the bin() function to convert integer to binary string. C/C++ Code x = bin(42) print(x) Output 0b101010Python bin() fun 2 min read Bin Size in Matplotlib Histogram Prerequisites: Matplotlib A histogram is a graphical representation of the distribution of data given by the user. Its appearance is similar to Bar-Graph except it is continuous. The towers or bars of a histogram are called bins. The height of each bin shows how many values from that data fall into that range. Width of each bin is = (max value of d 4 min read How to remove empty tags using BeautifulSoup in Python? Prerequisite: Requests, BeautifulSoup, strip The task is to write a program that removes the empty tag from HTML code. In Beautiful Soup there is no in-built method to remove tags that has no content. Module Needed:bs4: Beautiful Soup(bs4) is a Python library for pulling data out of HTML and XML files. This module does not come built-in with Python 2 min read Check if the image is empty using Python - OpenCV Prerequisite: Basics of OpenCV OpenCV (Open Source Computer Vision) is a computer vision library that contains various functions to perform operations on pictures or videos. It was originally developed by Intel but was later maintained by Willow Garage and is now maintained by Itseez. This library is cross-platform that it is available in multiple 2 min read Finding First Empty Column in an Excel Sheet using Python Excel is a spreadsheet in a computer application that is designed to add, display, analyze, organize, and manipulate data arranged in rows and columns. It is the most popular application for accounting, analytics, data presentation, etc. In this article, we will learn how to store user input in an excel sheet using Python. Methods used for taking u 3 min read Create an empty file using Python File handling is a very important concept for any programmer. It can be used for creating, deleting, and moving files, or to store application data, user configurations, videos, images, etc. Python too supports file handling and allows users to handle files i.e., to read and write files, along with many other file handling options, to operate on fi 3 min read Remove Empty Dates from X Axis using Python Plotly Plotly is a powerful graphing library that makes interactive, publication-quality graphs online using Python. One common task when creating time series plots is to remove empty dates from the x-axis, making the plot cleaner and more readable. In this article, we will go through the process of removing empty dates from the x-axis using Plotly. Key c 4 min read Generating all possible Subsequences using Recursion including the empty one. Given an array. The task is to generate and print all of the possible subsequences of the given array using recursion. Examples: Input : [1, 2, 3] Output : [3], [2], [2, 3], [1], [1, 3], [1, 2], [1, 2, 3], [] Input : [1, 2] Output : [2], [1], [1, 2], [] Approach: For every element in the array, there are two choices, either to include it in the sub 5 min read How to write an empty function in Python - pass statement? In C/C++ and Java, we can write empty function as following // An empty function in C/C++/Java void fun() { } In Python, if we write something like following in Python, it would produce compiler error. # Incorrect empty function in Python def fun(): Output : IndentationError: expected an indented block In Python, to write empty functions, we use pa 1 min read String slicing in Python to check if a string can become empty by recursive deletion Given a string “str” and another string “sub_str”. We are allowed to delete “sub_str” from “str” any number of times. It is also given that the “sub_str” appears only once at a time. The task is to find if “str” can become empty by removing “sub_str” again and again. Examples: Input : str = "GEEGEEKSKS", sub_str = "GEEKS" Output : Yes Explanation : 2 min read Python | Remove empty tuples from a list In this article, we will see how can we remove an empty tuple from a given list of tuples. We will find various ways, in which we can perform this task of removing tuples using various methods and ways in Python. Examples: Input : tuples = [(), ('ram','15','8'), (), ('laxman', 'sita'), ('krishna', 'akbar', '45'), ('',''),()]Output : [('ram', '15', 8 min read Python | Remove and print every third from list until it becomes empty Given a list of numbers, Your task is to remove and print every third number from a list of numbers until the list becomes empty. Examples: Input : [10, 20, 30, 40, 50, 60, 70, 80, 90] Output : 30 60 90 40 80 50 20 70 10 Explanation: The first third element encountered is 30, after 30 we start the count from 40 for the next third element which is 6 4 min read Python | Remove empty strings from list of strings In many scenarios, we encounter the issue of getting an empty string in a huge amount of data and handling that sometimes becomes a tedious task. Let's discuss certain way-outs to remove empty strings from list of strings. Method #1: Using remove() This particular method is quite naive and not recommended use, but is indeed a method to perform this 7 min read Python | Pandas TimedeltaIndex.empty Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandas is one of those packages and makes importing and analyzing data much easier. Pandas TimedeltaIndex.empty attribute return a boolean value. It returns False if the TimedeltaIndex object on which it is applied is no 2 min read Python | Pandas DataFrame.empty Pandas DataFrame is a two-dimensional size-mutable, potentially heterogeneous tabular data structure with labeled axes (rows and columns). Arithmetic operations align on both row and column labels. It can be thought of as a dict-like container for Series objects. This is the primary data structure of the Pandas. Pandas DataFrame.empty attribute che 2 min read Python: Check if a directory is empty Python is a widely used general-purpose, high-level programming language. It provides many functionalities and one among them is checking whether a directory is empty or not. This can be achieved by using os module. The OS module in Python provides functions for interacting with the operating system. OS comes under Python’s standard utility modules 2 min read Python: Get List of all empty Directories The OS module in Python is used for interacting with the operating system. This module comes with Python's standard utility module so there is no need to install it externally. All functions in the OS module raise OSError in the case of invalid or inaccessible file names and paths, or other arguments that have the correct type but are not accepted 2 min read Python Pytorch empty() method PyTorch is an open-source machine learning library developed by Facebook. It is used for deep neural network and natural language processing purposes. The function torch.empty() returns a tensor filled with uninitialized data. The shape of the tensor is defined by the variable argument size. Syntax: torch.empty(size, out=None) Parameters: size: a s 1 min read Python - Remove empty value types in dictionaries list Sometimes, while working with Python dictionaries, we require to remove all the values that are virtually Null, i.e does not hold any meaningful value and are to be removed before processing data, this can be an empty string, empty list, dictionary, or even 0. This has applications in data preprocessing. Let us discuss certain ways in which this ta 7 min read How to Create an Empty Figure with Matplotlib in Python? Creating a figure explicitly is an object-oriented style of interfacing with matplotlib. The figure is a basic building block of creating a plot as Matplotlib graphs our data on figures. This figure keeps track of all other components such as child axes, legends, title, axis, etc. Steps to create an empty figure : First, we import the matplotlib li 2 min read How to create an empty matrix with NumPy in Python ? The term empty matrix has no rows and no columns. A matrix that contains missing values has at least one row and column, as does a matrix that contains zeros. Numerical Python (NumPy) provides an abundance of useful features and functions for operations on numeric arrays and matrices in Python. If you want to create an empty matrix with the help of 3 min read How to check if a deque is empty in Python? In this article, we are going to know how to check if a deque is empty in Python or not. Python collection module provides various types of data structures in Python which include the deque data structure which we used in this article. This data structure can be used as a queue and stack both because it allows the user to insert and delete the elem 3 min read How to append a NumPy array to an empty array in Python In this article, we will cover how to append a NumPy array to an empty array in Python. Here, we will discuss 2 different methods to append into an empty NumPy array. Both of these methods differ slightly, as shown below: Append a NumPy array to an empty array using the appendExample 1 Here we are creating an empty array and then appending it to th 2 min read How to Delete Only Empty Folders in Python In this article, we are going to see how to delete only empty folders in Python. Before deleting the folder, here is an image showing the files inside the main directory. As the above image is showing that the folder has 2 empty sub-folders and 1 non-empty folder. So, after running the code these 2 folders must get deleted. By using os module With 1 min read Remove all empty files within a folder and subfolders in Python In this article, we will see how to remove all empty files within a folder and its subfolders in Python. We occasionally produce some empty files that are not needed. Here, we will use the below functions/methods to remove all empty files within a folder and its subfolder imported from the OS module and glob module. MethodDescriptionos.walk(path)Ge 4 min read Initializing dictionary with Empty Lists in Python In Python, it's common to encounter scenarios where you need to store lists in a dictionary. Often, this involves checking if a key exists and then creating a list for that key. However, a more efficient approach is to initialize the dictionary keys with empty lists from the start. Let's explore some methods to accomplish this. How to Initialize a 5 min read numpy.empty() in Python numpy.empty(shape, dtype = float, order = 'C') : Return a new array of given shape and type, with random values. Parameters : -> shape : Number of rows -> order : C_contiguous or F_contiguous -> dtype : [optional, float(by Default)] Data type of returned array. # Python Programming illustrating # numpy.empty method import numpy as geek b = 1 min read IndexError: pop from Empty List in Python The IndexError: pop from an empty list is a common issue in Python, occurring when an attempt is made to use the pop() method on a list that has no elements. This article explores the nature of this error, provides a clear example of its occurrence, and offers three practical solutions to handle it effectively. Here, we will see how to fix Pop From 3 min read