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Is it possible to write obfuscated one-liners in Python? Yes. Usually this is done with nested lambda forms. See the following three examples, due to Ulf Bartelt: # Primes < 1000 print filter(None,map(lambda y:y*reduce(lambda x,y:x*y!=0, map(lambda x,y=y:y%x,range(2,int(pow(y,0.5)+1))),1),range(2,1000))) # First 10 Fibonacci numbers print map(lambda x,f=lambda x,f:(x<=1) or (f(x-1,f)+f(x-2,f)): f(x,f), range(10)) # Mandelbrot set print (lambda Ru,Ro,Iu,Io,IM,Sx,Sy:reduce(lambda x,y:x+y,map(lambda y, […]

Python Memory Management In Python, when a program exits or a script finishes running, the operating system automatically reclaims the memory used by the program. However, it’s important to note that not all memory may be immediately released or freed. This behavior is not specific to Python but rather a characteristic of how modern operating

Code objects represent byte-compiled executable Python code, or bytecode. The difference between a code object and a function object is that the function object contains an explicit reference to the function’s globals (the module in which it was defined), while a code object contains no context; also the default argument values are stored in the function object, not

in this tutorial we will see how to use Elementtree module in Django templates. Here’s an ultra simple elementtree serialization filter for Django:: # File: templatetags/elementtree_extras.py try: import cElementTree as ET except ImportError: from elementtree.ElementTree as ET from django.core import template register = template.Library() ## # Serializes an element structure to XHTML (or just plain XML). def

In this tutorial, we will learn about Range() in Python and will see some of its uses. The Python range() function is used to return a sequence of numbers starting from 0 (by default if starting position is not provided) to the specified number by incrementing 1 (by default if increment value is not provided.)

Python has various arithmetic operators that take numerical values as input and returns a single numerical value. The arithmetic operators used in Python or any programming language are: Operator Use for Example + Addition x+y – Subtraction x-y * Multiplication x*y / Division x/y % Modulus x%y ** Exponentiation x**y // Floor division x//y Power

What are the comments? Comments are a piece of information that is written alongside programming code to explain the nature of the code and make it more readable. If you want to notify others what a certain piece of code does, you can do this using comments. Comments are show-piece in the eyes of the

In Python, we have the reverse() method to reverse the sorting order of the elements in List, Tuple, or String in place. Python Reverse with List Here we have a list of integers. We need to reverse its items. Output: 2, 7, 3, 5, 1 Below we have a list with string values. We need

The hash table implementation of dictionaries uses a hash value calculated from the key value to find the key. If the key were a mutable object, its value could change, and thus its hash could also change. But since whoever changes the key object can’t tell that it was being used as a dictionary key, it can’t

In this short post, we see if with not operator in Python. In Python, the not operator is a logical operator that performs boolean negation. It takes a single boolean operand and returns the opposite boolean value. You can use the not operator in an if statement to check if a given condition is not met. To make an if statement

The OS module in Python provides a unified interface to a number of operating system functions. Most of the functions in this module are implemented by platform-specific modules, such as posix and nt. The os module automatically loads the right implementation module when it is first imported. Working with files using OS Module in Python

Based in part on over 3,000 newsgroup articles written by Python veteran Fredrik Lundh since 1995, this book provides brief descriptions and sample scripts for all standard modules in the Python 2.0 Library. Printable chapters:Preface1. Core Modules2. More Standard Modules3. Threads and Processes4. Data Representation5. File Formats6. Mail and News Messages7. Network Protocols8. Internationalization9. Multimedia Modules10. Data Storage11. Tools and Utilities12. Platform Specific Modules13. Implementation Support Modules14. Other Modules

The XML Namespace specification adds qualified names to XML. A qualified name is a tag or attribute name that is associated with a given namespace. A namespace usually represents some kind of application domain, such as hypertext, graphics, resource descriptions, or type information. The Namespace specification allows a single XML document to contain tags and attributes from

ou are using a version of Python that uses a 4-byte representation for Unicode characters, but some C extension module you are importing was compiled using a Python that uses a 2-byte representation for Unicode characters (the default). If instead the name of the undefined symbol starts with PyUnicodeUCS4, the problem is the reverse: Python

Most of the internet applications are built using many interoperable languages; hence HTML alone will not be sufficient in making these web applications interactive. HTML is static, so you cannot have loops, variables, and interactive functionality. But HTML being a static language, it can beeasily incorporated with different languages to develop a complex page. In

In this post, we have talked about Logitech Unifying Software and it’s features and have given the way to download it. Many wireless mice and keyboards use a USB receiver to communicate with the computer. When you have multiple wireless peripherals, each one requires its own receiver, which can be inconvenient and may lead to

Note: This article is a stub. A more detailed analysis of different simple cache implementations will be published later. See the notes below for a rough summary. The following is a simple cache implementation, which is suitable for relatively small caches (up to a few hundred items), and where it’s relatively costly to create or reload

Tkinter Scrollbar Patterns Tkinter provides a number of scrollable widgets, but unlike many other toolkits, the widgets do not maintain their own scrollbars. To add a scrollbar to a scrollable widget, you have to create separate Scrollbar widget instances, and attach them to the widget. This article explains how the scrollbar interface works, and shows you how to

As JavaScript has no sleep function, how to perform sleep function in js? Let’s see. Sleep function in any programming language is used to pause or delay the execution of the programs for a certain period of time. The sleep function is often used to introduce a delay between two consecutive operations or to control

What is FastAPI? FastAPI is a modern, fast, web-based framework for building APIs (Application Programming Interfaces) in Python. It is designed to be easy to use, highly performant, and productive for developers. FastAPI is built on top of Starlette, a high-performance asynchronous web framework, and Pydantic, a powerful data validation and serialization library. FastAPI leverages

Q) which of the following java object is thread safe? The following Java objects are generally considered thread-safe: Note that while these objects are thread-safe, it is still important to use them correctly in your application to ensure proper synchronization and avoid race conditions. It’s also worth noting that the thread safety of an object

Using more abstraction in software development can have several potential results, including: It’s important to carefully consider the trade-offs of using abstraction in a software development project and strike a balance between the benefits and costs based on the specific requirements and constraints of the project. Properly designed and used abstraction can greatly improve the

People are often very surprised by results like this: and think it is a bug in Python. It’s not. It’s a problem caused by the internal representation of floating point numbers, which uses a fixed number of binary digits to represent a decimal number. Some decimal numbers can’t be represented exactly in binary, resulting in

(Windows/DOS only). This module gives you access to a number of functions in the Microsoft Visual C/C++ Runtime Library (MSVCRT). The getch function reads a single keypress from the console: Example: Using the msvcrt module to get key presses # File: msvcrt-example-1.py import msvcrt print “press ‘escape’ to quit…” while 1: char = msvcrt.getch() if char ==

Getting the Size of an Image on a Web Page Q. I need to dynamically access a webpage and find the largest graphic used on that page, so I tried the following… Largest as in “number of pixels”, or “number of bytes”? If you want to get the size in bytes, you don’t need to decode

What is Uncaught (in promise) DOMException Error? The error message “uncaught (in promise) DOMException” typically indicates an issue with a JavaScript Promise that has been rejected with a DOMException. When you make use of Promises in JavaScript, the code is structured in a way that allows it to handle asynchronous operations without blocking the main