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In Python, you can store a function as a text string in a SQLite database using the sqlite3 module. You cannot run the function directly from the database, but you can retrieve the code later and execute it using Python's exec() or eval() functions. This is helpful when you want to store or update function logic, like in code editors, plugins, or apps that run user-created scripts. Using sqlite3 and exec() Function The sqlite3 module is used to create and work with SQLite databases in Python. The exec() function can run Python code that is stored as a string, including ... Read More
To catch an exception for both base and derived classes, we need to put the catch block of the derived class before the base class. Otherwise, the catch block for the derived class will never be reached. This happens because C++ follows a top-down approach when checking catch blocks. So, by placing the derived class catch block first, we ensure that specific exceptions are handled correctly before falling back on the base class. Algorithm Following is the algorithm to catch Base and Derived classes Exceptions in C++: Begin Declare a class B. Declare another ... Read More
The size of a file refers to the number of bytes it occupies in memory. In C, size of a file can be found by moving the file pointer to the end of the file and checking its position. The position indicates the number of bytes the file contains. The most common way to do this is by using two functions: fseek() (to move to the end) and ftell() (to get the current position, which is the size of the file). Syntax Following is the syntax is as follows: FILE *fp = fopen("file.txt", "rb"); fseek(fp, 0, SEEK_END); long size = ... Read More
In this problem, we will see how to print "Hello World" into the console, but we cannot write anything into the main function. This problem can be solved in different ways. Initially, we will create a global variable, then we will store the returned value of the printf() function into that variable. When printf() is executed, then it will be printed. You can print "Hello World" without using the logic inside the main() function in different ways, such as using Global Constructors, Class Object and macros, or preprocessor, etc. Using Global Constructor A global constructor is the constructor of a global object ... Read More
The extended euclidean algorithms find the greatest common divisor (GCD) of two numbers in the form of ax + by = gcd(a, b). This expression is also known as Bezout's Identity. The extended Euclidean algorithm is an extension of the Euclid algorithm that is also used to find the GCD of two numbers using repetitive division. In this article, we have two numbers and our task is to implement the extended Euclidean algorithm to find the GCD of these two numbers in C++. Steps To Implement Extended Euclidean Algorithm The steps to implement an extended Euclidean algorithm are as ... Read More
In a few scenarios, we need to extract the extension of a file to perform specific operations based on its type, such as validating image formats or filtering document files. Python provides different ways to achieve this using the os and pathlib modules. In this article, we'll explore how to get a file’s extension with different approaches. Using os.path.splitext() The OS file path manipulation is made simple with the help of the Python os.path module. It provides methods to perform operations to receive data from file paths, opening, saving, and updating. The os.path.splitext() method of the os module in Python ... Read More
We can pass a JSON object as a parameter to a Python function using the json.loads() method. we can also convert the JSON string into a Python dictionary or list, which depends on its structure. Once converted, the data can be used just like any other dictionary or list in Python. JSON Object Consider a JSON object to pass to a python function. We will use it further in this article - { "name":"Rupert", "age": 25, "desig":"developer" } Using json.loads() Function Before passing a JSON object as a parameter ... Read More
In Python, handling white spaces between strings is easy. Sometimes, we may want to add space in a string, but we are not sure exactly how much. Python provides different ways to manage this, and one useful method is expandtabs() method. Using the expandtabs() Method The expandtabs() method in Python is used to replace tab characters (\t) in a string with spaces. It returns a new string where each \t is replaced with the number of spaces needed to reach the next tab stop. You can control how many spaces are used by passing a tabsize ... Read More
In Python, you can execute functions with multiple arguments directly from the terminal using different approaches depending on how your function is defined and how you want to provide the arguments. Executing Python functions from the terminal allows you to quickly test or run code without writing a full script. When a function requires multiple arguments, you can pass them manually, use input prompts, or use command-line arguments with the help of modules like sys or argparse. Using the Python Interactive Shell If you are working in the Python interactive shell, you can define and call functions directly by entering ... Read More
In Python, both functions and object methods are used to organize and reuse code, but they have different purposes. To understand which is more fundamental requires understanding how each one works and their roles in Python programming. A function in Python is a block of reusable code that performs a specific task. A method is a function that is associated with an object, meaning it belongs to a class or an instance. While both functions and methods can be used to perform operations, functions are more fundamental in the Python language. Why Functions Are More Fundamental in Python Functions are considered ... Read More