This tutorial will show you how to convert a Unicode string to a string in Python. If you already know about Unicode, you can skip the following background section and dive into the problem right away. Background Unicode A bit about Unicode from Wikipedia. Unicode is a character encoding standard that includes characters from almost … Read more
Python’s built-in repr(obj) function returns the standard string representation of the provided object. This often includes the type and memory address of the object—for lack of further information. For example, the returned string representation may be ‘<main.Car object at 0x000001F66D11DBE0>’ for a custom object of type Car. The function internally calls the method obj.__repr__() which … Read more
Python’s built-in str(x) function converts the object x to a string using the x.__str__() method or, if non-existent, the repr(x) built-in function to obtain the string conversion. Syntax str() Syntax: str(object) # –> Most common case: convert an object to a string str(object=b”, encoding=’utf-8′, errors=’strict’) # –> Not so common case: Converts a bytes or … Read more
Problem Formulation: Given a byte string that contains new-line characters ‘\n’. How to split the byte string into a list of lines? Example: You want to transform the byte string b’your\nbyte\nstring’ into the list of byte strings [b’your’, b’byte’, b’string’] using b’\n’ as a newline separator. Given: b’your\nbyte\nstring’ Goal: [b’your’, b’byte’, b’string’] Solution: To split … Read more
Problem Formulation: Given an integer number. How to convert the integer to a string representation for printing or other use that has thousand separators? Example: Given an integer number 1000000. You want the string representation ‘1,000,000’. Method 1: f-Strings Using the modern f-strings is, in my opinion, the most Pythonic solution to add commas as … Read more
Problem Formulation Given string s, and character c. How to remove all characters in s after the first occurrence of c? Example Given: – string s = ‘hello world’, and – empty space character c = ‘ ‘. Desired result: ‘hello’ Method 1: string.index() + slicing To remove everything after the first occurrence of character … Read more
Problem: Given a string; how to split/cut the string and extract the required characters? In this article, we will be discussing some interesting scenarios which allow us to split or cut a string and extract the necessary portion of the string that we need. Let us dive into each example/scenario and have a look at … Read more
Problem Formulation: Given a string of letters and numbers. How to split the string into substrings of either letters or numbers by using the boundary between a letter and a number and vice versa. Examples: Have a look at the following examples of what you want to accomplish. ‘111A222B333C’ —> [‘111’, ‘A’, ‘222’, ‘B’, ‘333’, … Read more
The Python ord() function takes a character (=string of length one) as an input and returns the Unicode number of this character. For example, ord(‘a’) returns the Unicode number 97. The inverse function of ord() is the chr() function, so chr(ord(‘a’)) returns the original character ‘a’. Here are three examples of passed Unicode characters transformed … Read more
A piece of Python code is a waste of time and resource without communicating with the real world. In this tutorial, you’ll master the humble, but powerful, Python print() function. Python’s built-in print() function prints a string representation of any number of objects to the standard output. The print() function has many advanced arguments to … Read more
Challenge: How to create a multi-line string in Python? In this tutorial, I’ll show you four methods to create and maintain multi-line strings in Python. The most Pythonic ones are the first two methods with triple single quotes ”’ … ”’ or triple double quotes “”” … “”” that wrap a string across multiple lines. … Read more
Problem: Write a function that joins an arbitrary number of string arguments with a given separator. Example: Given the string arguments “A”, “B”, and “C” and the string separator “-“. Join them to the concatenated string “A-B-C”. Solution: The following code creates a Python function concat() that takes an arbitrary number of arguments, packs them … Read more