Problem Formulation Given a string and a substring in Python. How to find the index of the last occurrence of the substring in Python? Let’s have a look at a couple of examples to thoroughly understand the problem: Example 1: string = ‘fifi’ substring = ‘fi’ result: 2 Example 2: string = ‘hello’ substring = … Read more
Use str.rstrip() to remove a trailing newline. Given a string s, create a new one without trailing newline character by calling s.rstrip(‘\n’). If you need the string stored in the original variable, simply assign the result to the original variable. Here’s an example: This actually removes all trailing newline characters: If you want to remove … Read more
Resumen: Para extraer números de una cadena determinada en Python puedes usar uno de los siguientes métodos: Utiliza el módulo regex . Utiliza las funciones split() y append() en una lista. Utiliza una comprensión de lista con las funciones isdigit() y split(). Utiliza el módulo num_from_string. Extraer dígitos o números de una cadena dada puede … Read more
Problem Formulation Using Python, we frequently need to deal with different kinds of numbers. We need to ask ourselves how to specify the number of decimal places in Python. By default, any number that includes a decimal point is considered a floating-point number. These binary floating-point numbers are hardware-based and lose accuracy after about 15 … Read more
Python’s __reversed__ magic method implements the reversed() built-in function that returns a reverse iterator over the values of the given sequence such as a list, a tuple, or a string. Syntax __reversed__(self) Let’s have a look at an example next. Example In the following code, you create a Person class with one name attribute. The … Read more
Syntax object.__repr__(self) The Python __repr__ method returns a string representation of the object on which it is called. It implements the built-in repr() function. If you call print(x) an object x, Python internally calls x.__str__() to determine the string representation of object x. If this isn’t implemented, Python calls x.__repr__(). We call this a “Dunder … Read more
Question Recap the following regular expression concepts (more details in the article below): The dot character . in regular expressions matches any character excluding the newline character. For example, the pattern ‘c.t’ will match the strings ‘cat’, ‘cut’, or ‘czt’. The character class [ ] is a set of characters: if you use it in … Read more
[toc] Overview Problem Statement: How to convert bytes data to string data in Python? Example: The following example illustrates how the decode() method converts a byte string to string. (We will dive into the details of this solution soon!) Output: Note: Difference between Byte and String Objects in Python Strings are normal sequences of characters, … Read more
Syntax object.__str__(self) The Python __str__ method returns a string representation of the object on which it is called. For example, if you call print(x) an object x, Python internally calls x.__str__() to determine the string representation of object x. This method is also used to implement the built-in str() function. We call this a “Dunder … Read more
Problema: Se dan dos listas l1 y l2. Quieres realizar una de las siguientes acciones: 1. Comparación booleana: comparar las listas por elementos y devolver True si la métrica de comparación devuelve True para todos los pares de elementos y False en caso contrario. 2. Diferencia: encontrar la diferencia entre los elementos de la primera … Read more
Python Mutliline Strings In this article we are going to look at how to properly indent your code for Python multiline strings, so let’s start by clarifying what a multiline string is and why indentation is important. Readability for other users is one of the key requirements of writing effective Python code, so having a … Read more
English version of article (English): https://blog.finxter.com/how-to-convert-an-integer-list-to-a-string-list-in-python/ La forma más pitónica de convertir una lista de enteros ints en una lista de cadenas es usar el código de una línea strings = [str(x) for x in ints]. Recorre todos los elementos de la lista ints y convierte cada elemento de la lista x en una cadena … Read more