In mathematics, the square of a number is the result of multiplying that number by itself. It is denoted by raising the number to the power of 2. For example, the square of 4 is written as 4^2, which equals 16, because 4 multiplied by 4 is 16.
In mathematics, the square root of a number is a value that, when multiplied by itself, gives the original number. It is denoted by the radical symbol (√) or by using the exponent 0.5. For example, the square root of 9 is 3 because 3 * 3 = 9.
In Python, a shebang line, also known as a hashbang or hashpling, is a special line at the beginning of a script or executable file that indicates the path to the interpreter that should be used to execute the script.
Using the if-not statement The most common way to check if a list is empty in Python is to use an if not statement. If a list is empty the condition evaluates to True; otherwise, it evaluates to False. Example:
If you want to import a file from another directory, you can add the part from the other directory to the system path using sys.path.append. Then you can import and use the functions from the other directory. If both directories are intended to be part of the same package, you can use relative imports.
python-dotenv is a Python library that helps manage environment variables in your Python projects by reading variables from a .env file and loading them into the environment. Environment variables are typically used to store configuration settings, API keys, database connection strings, and other sensitive information outside of your codebase.
To load a JSON file in Python, you can use the json module, which is part of the standard library. The json module in Python provides two main functions for loading JSON data: json.load() for loading JSON data from a file-like object and json.
In Python, optional arguments (also known as default arguments) allow you to define functions with parameters that have default values. When the function is called, if a value is provided for a parameter, it will use that value; otherwise, it will use the default value specified in the function definition.
What are *args In Python, *args is a syntax that allows a function to accept a variable number of positional arguments. The asterisk (*) is used in the function definition to collect any additional positional arguments passed to the function into a tuple.
In Python, you can access environment variables using the os module. You can access all variables via os.environ() or access a specific variable using os.getenv() or os.environ.get() Get all environment variables You can get all environment variables using the os.environ() function of the os module