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The list in Python is a sequence data type that is used to store various types of data. A list is created by placing each data element inside square brackets "[]" and these are separated by commas. In Python, the assignment operator doesn’t create a new object; rather, it gives another name to an already existing object. This can be verified by id() function >>> L1 = [1, 2, 3, 4] >>> L2 = L1 >>> id(L1) 185117137928 >>> id(L2) 185117137928 There are various ways of cloning/copying a list in Python. In this article, we will discuss some ... Read More
Flattening a shallow list means converting a nested list into a simple, single-dimensional list. In other words, converting a multidimensional list into a one-dimensional list. Flattening can be performed using different techniques like nested for loops, list comprehensions, list concatenation, and using built-in functions. In this article, we will discuss a few techniques to flatten a shallow Python list. Flattening a shallow list using a nested for loop By using a nested for loop and a list.append() method, we can flatten the shallow list. Let’s have a look and see how this can be done in a program. Example This simple example ... Read More
In Python, lists are one of the built-in data structures that are used to store collections of data. The lists are mutable, which means we can modify their elements after they are created.Updating Python List Elements You can update single or multiple list elements using the append, insert, extend, remove, and clear functions. In this article, we will discuss how we can update an existing element in the list. The list is an index-based sequential data structure. We can access the list elements by their index position, known as index values. The index values of the Python lists are represented ... Read More
In Java, the cannot find symbol error occurs when we try to reference a variable that is not declared in the program or when we try to access a class that is not declared or imported. Possible Causes of 'Cannot Find Symbol' Error Below is a list of some possible causes of the 'cannot find symbol' error in Java - Using a variable that is not declared or outside the code. Using wrong cases ("tutorials" and "Tutorials" are different) or making spelling mistakes. The packaged class has ... Read More
In Python, a list is a dynamic array that can be expanded in size as needed. The maximum size of a list is limited by the system's memory and the platform's architecture. In this article, we will explore how to determine the maximum size of a list in Python. Understanding Python List Limits The size of a list in Python is not restricted by any fixed value set in the language itself but also it depends on below factors - Available system memory (RAM) System architecture, i.e., 32-bit or 64-bit The value of ... Read More
In Python, strings are dynamic and can extend to a very large size, and can be limited only by the system's available memory. In other languages, compared to Python, it does not define a strict upper bound on string length. Instead, the practical maximum length of a string depends on the platform and memory constraints. In this article, we will explore how to determine the theoretical maximum string length in Python. Maximum Theoretical String Length Python strings are stored as sequences of Unicode characters, and the maximum size of a Python object is typically constrained by the value of sys.maxsize ... Read More
Python allows dictionaries to be sorted using the built-in sorted() function. In this article, we will explore different ways to sort a dictionary in Python by its values. Sort a Dictionary Using itemgetter() method When we use the sorted() function along with the itemgetter() method of the operator module, the dictionary will be sorted by its values. The itemgetter() function returns a callable object that fetches an item from its operand using the provided index. Example Following is an example that shows how to sort a dictionary by its values using itemgetter() along with the sorted() function - from operator import ... Read More
In Python, floating-point numbers can be implemented using double-precision, i.e., 64-bit format, as per the IEEE 754 standard. These floats have a finite range and precision. The maximum value that a float can represent depends on the platform that we are using, but can be accessed using the sys.float_info attribute. Maximum Value of Float using sys.float_info The sys.float_info object provides details about the float implementation on the current platform. The attribute float_info.max gives the largest positive floating-point number representation. Example Here in this example, we are going to use float_info.max attribute from the sys.float_info object to get the maximum float value ... Read More
Python allows dictionaries to be sorted using the built-in sorted() function. Although dictionaries in Python 3.7+ preserve insertion order, we can still create a new dictionary sorted by its keys using various methods. In this article, we will explore different ways to sort a dictionary in Python by its keys. Using sorted() with a for Loop We can use the sorted() function on the dictionary keys and then iterate through them to build a new dictionary in key order. Example Following is an example, which shows how to sort a dictionary in Python using the sorted() function - dictionary = ... Read More
When we are starting with Python, mostly created first program will be "Hello, World", which prints the statement "Hello, World" as the output. Before we begin with the first program, we need to install Python in our system from the official website. Choose a Code Editor After installing Python, we need to select the text editor based on our requirements and usage. Following are the different editors available - IDLE: It comes pre-installed with Python VS Code: A popular and lightweight code editor PyCharm: This is useful ... Read More