6 days ago · Howdy! Those are the boring security releases that aren’t supposed to bring anything new. But not this time! We do have a bit of news, actually. But first things first: …Why You Should Use Python. Python, named after the British comedy group Monty Python, is a high-level, interpreted, interactive, and object-oriented programming language. Its flexibility allows you to do many things, both big and small.With Python, you can write basic programs and scripts and also to create complex and large-scale enterprise solutions.Aug 5, 2022 · action-2 case pattern-3: action-3 case _: action-default. Note that the underscore symbol is what you use to define a default case for the switch statement in Python. An example of a switch statement written with the match case syntax is shown below. It is a program that prints what you can become when you learn various …Python is one of the most popular programming languages in today’s digital age. Known for its simplicity and readability, Python is an excellent language for beginners who are just...The core of extensible programming is defining functions. Python allows mandatory and optional arguments, keyword arguments, and even arbitrary argument lists. More about …Mar 3, 2022 · Basic if Statement. In Python, if statements are a starting point to implement a condition. Let’s look at the simplest example: if <condition>: <expression> When … for Loop with Python range () In Python, the range () function returns a sequence of numbers. For example, values = range(4) Here, range (4) returns a sequence of 0, 1, 2 ,and 3. Since the range () function returns a sequence of numbers, we can iterate over it using a for loop. For example, Nov 1, 2021 · The += Operator In Python – A Complete Guide. By Isha Bansal / November 1, 2021. In this lesson, we will look at the += operator in Python and see how it works …Python is one of the most popular programming languages in the world, known for its simplicity and versatility. If you’re a beginner looking to improve your coding skills or just w...Dec 27, 2023 · In Python, Logical operators are used on conditional statements (either True or False). They perform Logical AND, Logical OR, and Logical NOT operations. OPERATOR. DESCRIPTION. SYNTAX. Example. and. Returns True if both the operands are true. x and y. Each new version of Python adds new features to the language. For Python 3.8, the biggest change is the addition of assignment expressions.Specifically, the := operator gives you a new syntax for assigning variables in the middle of expressions. This operator is colloquially known as the walrus operator.. This tutorial is an in-depth introduction to the walrus …Jan 25, 2024 · This scaling is omitted if cov='unscaled', as is relevant for the case that the weights are w = 1/sigma, with sigma known to be a reliable estimate of the uncertainty. Returns: p ndarray, shape (deg + 1,) or (deg + 1, K) Polynomial coefficients, highest power first. If y was 2-D, the coefficients for k-th data set are in p[:,k].Jun 26, 2023 · In Python, the “//” operator works as a floor division for integer and float arguments. However, the division operator ‘/’ returns always a float value. Note: The “//” operator is used to return the closest integer value which is less than or equal to a specified expression or value. So from the above code, 5//2 returns 2.Aug 20, 2021 · Python also has a built-in function to convert floats to integers: int (). The int () function works similarly to the float () function: you can add a floating-point number inside of the parentheses to convert it to an integer: int(390.8) In …Jun 26, 2013 · 7 Answers. 1/2 is 0 with a remainder of 1. The % operator returns that remainder. Where q is floor (a/n). So: % is the modulo operator. It returns the remainder after dividing the left hand side by the right hand side. Since 2 divides zero times into 1, the remainder is one. In general, if a and b are positive integers, and a < b, then a % b == a. for Loop with Python range () In Python, the range () function returns a sequence of numbers. For example, values = range(4) Here, range (4) returns a sequence of 0, 1, 2 ,and 3. Since the range () function returns a sequence of numbers, we can iterate over it using a for loop. For example,Jun 9, 2020 ... https://neetcode.io/ - A better way to prepare for Coding Interviews LinkedIn: https://www.linkedin.com/in/navdeep-singh-3aaa14161/ ...Complex number literals in Python mimic the mathematical notation, which is also known as the standard form, the algebraic form, or sometimes the canonical form, of a complex number.In Python, you can use either lowercase j or uppercase J in those literals.. If you learned about complex numbers in math class, you might have seen them expressed …May 18, 2022 · In this tutorial, you’ll learn how to use Python to find prime numbers, either by checking if a single value is a prime number or finding all prime numbers in a range of values.Prime numbers are numbers that have no factors other than 1 and the number itself. Being able to work with prime numbers is a common task in occupations such as …Apr 12, 2022 · Well, to write greater than or equal to in Python, you need to use the >= comparison operator. It will return a Boolean value – either True or False. The "greater than or equal to" operator is known as a comparison operator. These operators compare numbers or strings and return a value of either True or False.Jan 3, 2017 · Therefore, a[:-1:-1] means "go from the end of a, which is a[-1] (since i is unspecified and k is negative), to the last element of a (since j == -1), with step size of -1". i and j are equal – you start and stop slicing in the same place – so the expression evaluates to an empty list. Python 3.8.1 - Dec. 18, 2019. Note that Python 3.8.1 cannot be used on Windows XP or earlier. Download Windows help file; Download Windows x86 embeddable zip file; Download Windows x86 executable installer; Download Windows x86 web-based installer; Download Windows x86-64 embeddable zip file; Download Windows x86-64 executable …Sure, here is an in-depth solution for start index from 1 in Python in Python with proper code examples and outputs. In Python, lists are 0-indexed by default. This means that the first element in a list has index 0, the second element has index 1, and so on. However, it is possible to start the index at 1 by using the enumerate() function.Jul 17, 2021 · The fact that I can type does not mean that I can "python", I really like gnibbler's answer over for-messy-things. Thanks everyone for your answers and -- keep things simple, special thanks to gnibbler. May 18, 2023 · Sets in Python. A Set in Python programming is an unordered collection data type that is iterable, mutable and has no duplicate elements. The major advantage of using a set, as opposed to a list, is that it has a highly optimized method for checking whether a specific element is contained in the set. This is based on a data structure known as a ...Slicing arrays. Slicing in python means taking elements from one given index to another given index. We pass slice instead of index like this: [start:end] .May 30, 2023 · Speed = Distance / Time. We declared 3 functions to calculate speed, distance, and time. Then passed the positive and negative integer and float point values to them using the Python abs () function. The abs () function will automatically convert the negative values to positive values, which will be used to calculate speed, distance, and …List elements can also be accessed using a negative list index, which counts from the end of the list: File "<input>", line 1, in <module> a[-8] IndexError: list index out of range. Slicing is indexing syntax that extracts a portion from a list. If a is a list, then a [m:n] returns the portion of a: Omitting the first index a [:n] starts the ...Modern society is built on the use of computers, and programming languages are what make any computer tick. One such language is Python. It’s a high-level, open-source and general-...The k-means clustering method is an unsupervised machine learning technique used to identify clusters of data objects in a dataset. There are many different types of clustering methods, but k-means is one of the oldest and most …Apr 4, 2015 · When I review python document and relearn python in detail now, I find range() built-in function it can directly make a list, but I look no one doing this. Depends, if you are using Python 2.X it does but for Python 3.X it produces a range object which should be iterated upon to create a list if you need to. Apr 12, 2022 · Well, to write greater than or equal to in Python, you need to use the >= comparison operator. It will return a Boolean value – either True or False. The "greater than or equal to" operator is known as a comparison operator. These operators compare numbers or strings and return a value of either True or False.... Python asigna a la variable de control el valor que le corresponde de acuerdo con el elemento iterable que define el bucle: i = 10 print(f"El bucle no ha ...Aug 10, 2010 · s = slice(1, 2, 3) assert s.start == 1 assert s.stop == 2 assert s.step == 3 This is notably used in Numpy to slice multi-dimensional arrays in any direction. Of course, any sane API should use ::3 with the usual "every 3" semantic. The related Ellipsis is covered further at: What does the Ellipsis object do? Table of Contents. Getting Started With Membership Tests in Python. Python’s in Operator. Python’s not in Operator. Using in and not in With Different Python Types. Lists, Tuples, …Nov 7, 2023 · Matplotlib: Visualization with Python. Matplotlib is a comprehensive library for creating static, animated, and interactive visualizations in Python. Matplotlib makes easy things easy and hard things possible. Create publication quality plots . Make interactive figures that can zoom, pan, update. Customize visual style and layout .Are you a Python developer tired of the hassle of setting up and maintaining a local development environment? Look no further. In this article, we will explore the benefits of swit...Apr 28, 2020 · Python doesn't convert the values on both sides of == to the same type. 1 == 1 would return True and "1" == "1" would return True, but the string, "1", is not equal to the integer, 1. Because they are not comparable types. If you put a number in quotation marks it becomes a string. This basically means that it is being treated as letter or set ... Home. Python. 1 Python: What is in 1 in Python? / Python / By Varun Saharawat. 1 Python represents an integer value. Integers are whole numbers that can be positive, negative, …Jun 9, 2020 ... https://neetcode.io/ - A better way to prepare for Coding Interviews LinkedIn: https://www.linkedin.com/in/navdeep-singh-3aaa14161/ ...6. Python Special operators. Python language offers some special types of operators like the identity operator and the membership operator. They are described below with examples. Identity operators. In Python, is and is not are used to check if two values are located at the same memory location.Dec 7, 2023 · Linux Note: Starting with TensorFlow 2.10, Linux CPU-builds for Aarch64/ARM64 processors are built, maintained, tested and released by a third party: AWS.Installing the tensorflow package on an ARM machine installs AWS's tensorflow-cpu-aws package. They are provided as-is. Tensorflow will use reasonable efforts to maintain the availability and integrity …Jul 21, 2022 · Kolade Chris. In Python, you use the double slash // operator to perform floor division. This // operator divides the first number by the second number and rounds the result down to the nearest integer (or whole number). In this article, I will show you how to use the // operator and compare it to regular division so you can see how it works.Dec 20, 2023 · bool () is a built-in function of Python programming language. It is used to convert any other data type value (string, integer, float, etc) into a boolean data type. Unmute. ×. boolean data type can store only 2 values: True and False. False Values: 0, NULL, empty lists, tuples, dictionaries, etc. True Values: All other values will return true.May 9, 2023 · Power Function in Python with Modulus. We can pass more than two parameters to the pow () in Python. The first parameter is the number on which we want to apply the Pow () function, the second parameter is the power and the third parameter is to perform the modulus operation. It return the value of 3 to the power of 4, modulus 10 (same as (3 ... Python lists store multiple data together in a single variable. In this tutorial, we will learn about Python lists (creating lists, changing list items, removing items, and other list operations) with the help of examples. Jun 26, 2023 · In Python, the “//” operator works as a floor division for integer and float arguments. However, the division operator ‘/’ returns always a float value. Note: The “//” operator is used to return the closest integer value which is less than or equal to a specified expression or value. So from the above code, 5//2 returns 2.Jun 26, 2023 · In Python, the “//” operator works as a floor division for integer and float arguments. However, the division operator ‘/’ returns always a float value. Note: The “//” operator is used to return the closest integer value which is less than or equal to a specified expression or value. So from the above code, 5//2 returns 2. Dec 27, 2023 · In Python, Logical operators are used on conditional statements (either True or False). They perform Logical AND, Logical OR, and Logical NOT operations. OPERATOR. DESCRIPTION. SYNTAX. Example. and. Returns True if both the operands are true. x and y.1 day ago · Changed in version 3.5: The use of venv is now recommended for creating virtual environments. Deprecated since version 3.6: pyvenv was the recommended tool for creating virtual environments for Python 3.3 and 3.4, and is deprecated in Python 3.6. On Windows, invoke the venv command as follows: c:\>Python35\python -m venv c:\path\to\myenv.Jun 26, 2023 · In Python, the “//” operator works as a floor division for integer and float arguments. However, the division operator ‘/’ returns always a float value. Note: The “//” operator is used to return the closest integer value which is less than or equal to a specified expression or value. So from the above code, 5//2 returns 2.Defining a Dictionary. Dictionaries are Python’s implementation of a data structure that is more generally known as an associative array. A dictionary consists of a collection of key-value pairs. Each key-value pair maps the key to its associated value. You can define a dictionary by enclosing a comma-separated list of key-value pairs in ...Python is one of the most popular programming languages in the world, known for its simplicity and versatility. If you’re a beginner looking to improve your coding skills or just w... Python. if index % modulus == 0: print() This code takes the current iteration index and, using the modulo operator, compares it with modulus. If the result equals 0, then it can run interval-specific code. In this case, the function calls print () to add a newline, which starts a new row. Mar 17, 2023 · Numpy支持大量的维度数组和矩阵运算，对数组运算提供了大量的数学函数库！Numpy比Python列表更具优势，其中一个优势便是速度。在对大型数组执行操作时，Numpy的速度比Python列表的速度快了好几百。因为Numpy数组本身能节省内存，并且Numpy在执行算术、统计和线性代数运算时采用了优化算法。1 day ago · Python Identity Operators. Identity operators are used to compare the objects, not if they are equal, but if they are actually the same object, with the same memory …Sep 19, 2018 · So, if you wanted the last element in array, you would call array[-1]. All your return c.most_common()[-1] statement does is call c.most_common and return the last value in the resulting list, which would give you the least common item in that list. Essentially, this line is equivalent to: temp = c.most_common() return temp[len(temp) - 1] Jul 17, 2021 · The fact that I can type does not mean that I can "python", I really like gnibbler's answer over for-messy-things. Thanks everyone for your answers and -- keep things simple, special thanks to gnibbler. After defining a list, it's possible to update the individual items in a list. # Defining a list z = [3, 7, 4, 2] # Update the item at index 1 ...Table of Contents. Getting Started With Membership Tests in Python. Python’s in Operator. Python’s not in Operator. Using in and not in With Different Python Types. Lists, Tuples, …Mar 27, 2023 · To create a list of numbers from 1 to N in Python using the range () function you have to pass two arguments to range (): “start” equal to 1 and “stop” equal to N+1. Use the list () function to convert the output of the range () function into a list and obtain numbers in the specified range.Sep 15, 2022 · Slicing in Python gets a sub-string from a string. The slicing range is set as parameters i.e. start, stop and step. For slicing, the 1st index is 0. For negative indexing, to display the 1st element to last element in steps of 1 in reverse order, we use the [::-1]. The [::-1] reverses the order. In a similar way, we can slice strings like this.Dec 7, 2023 · Linux Note: Starting with TensorFlow 2.10, Linux CPU-builds for Aarch64/ARM64 processors are built, maintained, tested and released by a third party: AWS.Installing the tensorflow package on an ARM machine installs AWS's tensorflow-cpu-aws package. They are provided as-is. Tensorflow will use reasonable efforts to maintain the availability and integrity …Mar 13, 2024 · A String is a data structure in Python that represents a sequence of characters. It is an immutable data type, meaning that once you have created a string, you cannot change it. Strings are used widely in many different applications, such as storing and manipulating text data, representing names, addresses, and other types of data that can be ... Aug 5, 2022 · action-2 case pattern-3: action-3 case _: action-default. Note that the underscore symbol is what you use to define a default case for the switch statement in Python. An example of a switch statement written with the match case syntax is shown below. It is a program that prints what you can become when you learn various …Feb 27, 2021 · In this article, we will dive into a fundamental yet crucial concept in Python. We will be learning the significance and uses of the += operator in Python. Description += is an assignment operator in Python that adds the right side operand’s value to the left side operand and assigns the result to the left operand. Syntax a += b. Example:Mar 3, 2022 · Output: x is equal to y. Python first checks if the condition x < y is met. It isn't, so it goes on to the second condition, which in Python, we write as elif, which is short for else if. If the first condition isn't met, check the second condition, and if it’s met, execute the expression. Else, do something else. 1 day ago · csv. writer (csvfile, dialect = 'excel', ** fmtparams) ¶ Return a writer object responsible for converting the user’s data into delimited strings on the given file-like object. csvfile can be any object with a write() method. If csvfile is a file object, it should be opened with newline='' [1].An optional dialect parameter can be given which is used to define a …Mar 13, 2024 · 1. Operator precedence Table in Python: f (args…) {key: value…} When we have more than one operator, the one with higher precedence will be evaluated first. From the above table, we can see that parentheses will be evaluated first and lambda at the last. 2.Feb 27, 2021 · In this article, we will dive into a fundamental yet crucial concept in Python. We will be learning the significance and uses of the += operator in Python. Description += is an assignment operator in Python that adds the right side operand’s value to the left side operand and assigns the result to the left operand. Syntax a += b. Example:Oct 10, 2023 · Python でのスライス. Python での [ : -1] の重要性. スライスはプログラミング言語での操作であり、オブジェクトのシーケンスまたはオブジェクトや文字列の配列に対して実行できます。. スライスでは、関数とより単純な表記法を使用してデータ構造を ... Mar 14, 2024 · USA TODAY. 0:05. 0:51. Wildlife experts in Southwest Florida recently snagged 500 pounds of Burmese pythons - including one more than 16 feet long, after …Feb 27, 2021 · In this article, we will dive into a fundamental yet crucial concept in Python. We will be learning the significance and uses of the += operator in Python. Description += is an assignment operator in Python that adds the right side operand’s value to the left side operand and assigns the result to the left operand. Syntax a += b. Example:Dec 14, 2020 · December 1, 2023. The Python += operator lets you add two values together and assign the resultant value to a variable. This operator is often referred to as the addition assignment operator. It is shorter than adding two numbers together and then assigning the resulting value using both a + and an = sign separately. Mar 4, 2024 · Note. The Python and NumPy indexing operators [] and attribute operator . provide quick and easy access to pandas data structures across a wide range of use cases. This makes interactive work intuitive, as there’s little new to learn if you already know how to deal with Python dictionaries and NumPy arrays.Jan 25, 2024 · This scaling is omitted if cov='unscaled', as is relevant for the case that the weights are w = 1/sigma, with sigma known to be a reliable estimate of the uncertainty. Returns: p ndarray, shape (deg + 1,) or (deg + 1, K) Polynomial coefficients, highest power first. If y was 2-D, the coefficients for k-th data set are in p[:,k].Mar 19, 2024 · There are two other ways you can calculate the exponents of numbers in Python. Using the pow() Function to Calculate Exponents in Python. The built-in pow() function is an efficient way to calculate powers in Python. While the "**" operator is intuitive and clear, pow()is the more traditional method.Dec 14, 2020 · December 1, 2023. The Python += operator lets you add two values together and assign the resultant value to a variable. This operator is often referred to as the addition assignment operator. It is shorter than adding two numbers together and then assigning the resulting value using both a + and an = sign separately. May 9, 2019 · 深入理解Python中的None. Python中的None是一个经常被用到的知识点，但是很多人对于None的内涵把握的还是不够精确，今天就和我一起好好理解下这个小知识点吧。. 1.None表示空，但它不等于空字符串、空列表，也不等同于False，通过下面的代码进行验证。. 2.在写代码 ...Mar 19, 2024 · There are two other ways you can calculate the exponents of numbers in Python. Using the pow() Function to Calculate Exponents in Python. The built-in pow() function is an efficient way to calculate powers in Python. While the "**" operator is intuitive and clear, pow()is the more traditional method.OpenAI Python API library. The OpenAI Python library provides convenient access to the OpenAI REST API from any Python 3.7+ application. The library includes type definitions for all request params and response fields, and offers both synchronous and asynchronous clients powered by httpx.1 day ago · Python 3.12 有什么新变化？ 或自从 Python 2.0，全部的“新变化”文档 教程 开始 Python 的语法和特性之旅 库参考 标准库与内置对象 语言参考 语法与语言元素 Python 安装与使用 各种操作系统的介绍都有 Python 指南 深入学习特定主题 安装 Python 模块 第三方模块与 PyPI.org ...Nov 1, 2021 · The += Operator In Python – A Complete Guide. By Isha Bansal / November 1, 2021. In this lesson, we will look at the += operator in Python and see how it works …Mar 19, 2024 · Python For Loop with a step size. This code uses a for loop in conjunction with the range () function to generate a sequence of numbers starting from 0, up to (but not including) 10, and with a step size of 2. For each number in the sequence, the loop prints its value using the print () function. The output will show the numbers 0, 2, 4, 6, and 8.Mappings. If the primary is a mapping, the expression list must evaluate to an object whose value is one of the keys of the mapping, and the ...1 day ago · csv. writer (csvfile, dialect = 'excel', ** fmtparams) ¶ Return a writer object responsible for converting the user’s data into delimited strings on the given file-like object. csvfile can be any object with a write() method. If csvfile is a file object, it should be opened with newline='' [1].An optional dialect parameter can be given which is used to define a …In this tutorial, you’ll explore regular expressions, also known as regexes, in Python. A regex is a special sequence of characters that defines a pattern for complex string-matching functionality. Earlier in this series, in the tutorial Strings and Character Data in Python, you learned how to define and manipulate string objects. Python lists store multiple data together in a single variable. In this tutorial, we will learn about Python lists (creating lists, changing list items, removing items, and other list operations) with the help of examples. Aug 20, 2023 · Python dictionary is an unordered collection of data that stores data in the format of key:value pair. It is like hash tables in any other language with the time complexity of O(1). Indexing of Python Dictionary is done with the help of keys. These are of any hashable type i.e. an object whose can never change like strings, numbers, tuples, etc.
Aug 5, 2022 · action-2 case pattern-3: action-3 case _: action-default. Note that the underscore symbol is what you use to define a default case for the switch statement in Python. An example of a switch statement written with the match case syntax is shown below. It is a program that prints what you can become when you learn various …. Albright art gallery buffalo
Mar 19, 2024 · Python For Loop with a step size. This code uses a for loop in conjunction with the range () function to generate a sequence of numbers starting from 0, up to (but not including) 10, and with a step size of 2. For each number in the sequence, the loop prints its value using the print () function. The output will show the numbers 0, 2, 4, 6, and 8. for Loop with Python range () In Python, the range () function returns a sequence of numbers. For example, values = range(4) Here, range (4) returns a sequence of 0, 1, 2 ,and 3. Since the range () function returns a sequence of numbers, we can iterate over it using a for loop. For example, May 18, 2022 · In this tutorial, you’ll learn how to use Python to find prime numbers, either by checking if a single value is a prime number or finding all prime numbers in a range of values.Prime numbers are numbers that have no factors other than 1 and the number itself. Being able to work with prime numbers is a common task in occupations such as …Dec 20, 2023 · bool () is a built-in function of Python programming language. It is used to convert any other data type value (string, integer, float, etc) into a boolean data type. Unmute. ×. boolean data type can store only 2 values: True and False. False Values: 0, NULL, empty lists, tuples, dictionaries, etc. True Values: All other values will return true.Python is one of the most popular programming languages in the world, known for its simplicity and versatility. If you’re a beginner looking to improve your coding skills or just w...Aug 23, 2023 · Python code to demonstrate Type conversion using dict (), complex (), str () dict (): This function is used to convert a tuple of order (key, value) into a dictionary. str (): Used to convert an integer into a string. complex (real,imag) : This function converts real numbers to complex (real,imag) number. Python3.1 day ago · 4. Using Python on Windows ¶. This document aims to give an overview of Windows-specific behaviour you should know about when using Python on Microsoft Windows. Unlike most Unix systems and services, Windows does not include a system supported installation of Python. To make Python available, the CPython team has compiled Windows installers ...Mar 4, 2024 · Installation instructions for Miniconda can be found here. The next step is to create a new conda environment. A conda environment is like a virtualenv that allows you to specify a specific version of Python and set of libraries. Run the following commands from a terminal window. conda create -c conda-forge -n name_of_my_env python pandas.3 days ago · 3.1.3. Lists¶ Python knows a number of compound data types, used to group together other values. The most versatile is the list, which can be written as a list of comma-separated values (items) between square brackets. Lists might contain items of different types, but usually the items all have the same type. ...Table of Contents. Getting Started With Membership Tests in Python. Python’s in Operator. Python’s not in Operator. Using in and not in With Different Python Types. Lists, Tuples, …Dec 11, 2023 · Python Increment Operator (+=) In Python, we can achieve incrementing by using Python ‘+=’ operator. This operator adds the value on the right to the variable on the left and assigns the result to the variable. In this section, we will see how use Increment Operator in Python. We don’t write things like: for (int i = 0; i < 5; ++i) For ... File "<ipython-input-6-a1fcabcd869c>", line 1 print "Hello, World!" ^ SyntaxError: Missing parentheses in call to 'print'. Did you mean print(&quo...20 hours ago · Mon 25 Mar 2024 // 18:00 UTC. More than 170,000 users are said to have been affected by an attack using fake Python infrastructure with "successful exploitation …1 day ago · csv. writer (csvfile, dialect = 'excel', ** fmtparams) ¶ Return a writer object responsible for converting the user’s data into delimited strings on the given file-like object. csvfile can be any object with a write() method. If csvfile is a file object, it should be opened with newline='' [1].An optional dialect parameter can be given which is used to define a …Mar 3, 2022 · Output: x is equal to y. Python first checks if the condition x < y is met. It isn't, so it goes on to the second condition, which in Python, we write as elif, which is short for else if. If the first condition isn't met, check the second condition, and if it’s met, execute the expression. Else, do something else. .