Problem Formulation In the following example, you use a newline character ‘\n’ inside the curly braces of an f-string: But if you run this code, Python raises a SyntaxError: f-string expression part cannot include a backslash. ⚡ The reason is that there is a limitation in versions of Python before 3.12 where backslashes are not … Read more
I have just created this small helper tool to extract all email addresses from a huge text file or string. Simply copy and paste your text into the field and click “Extract Emails“: 👇 Email Extractor Enter Text: Extract Emails Copy to Clipboard Extracted Emails: JavaScript Regex In the online tool above, I used a … Read more
Python String Comprehension is a concise way to create strings using a single line of code, often involving iteration and optional conditionals, providing a succinct, readable alternative to using loops. It’s particularly useful for generating strings based on existing iterables. Here’s an example: In this example, the generator expression (fruit[0] for fruit in input_list if … Read more
When working with lists that contain Unicode strings, you may encounter characters that make it difficult to process or manipulate the data or handle internationalized content or content with emojis 😻. In this article, we will explore the best ways to remove Unicode characters from a list using Python. You’ll learn several strategies for handling … Read more
The best way to remove Unicode characters from a Python dictionary is a recursive function that iterates over each key and value, checking their type. ✅ If a value is a dictionary, the function calls itself. ✅ If a value is a string, it’s encoded to ASCII, ignoring non-ASCII characters, and then decoded back to … Read more
To remove all Unicode characters from a JSON string in Python, load the JSON data into a dictionary using json.loads(). Traverse the dictionary and use the re.sub() method from the re module to substitute any Unicode character (matched by the regular expression pattern r'[^\x00-\x7F]+’) with an empty string. Convert the updated dictionary back to a … Read more
To add trailing zeros to a string up to a certain length in Python, convert the number to a string and use the ljust(width, ‘0’) method. Call this method on the string, specifying the total desired width and the padding character ‘0’. This will append zeros to the right of the string until the specified … Read more
The multiplication operator (*) allows you to repeat a given string a certain number of times. However, if you want to repeat a string to a specific length, you might need to employ a different approach, such as string slicing or a while loop. For example, while manipulating strings in Python, you may need to … Read more
To create and manage multiline strings in Python, you can use triple quotes and backslashes, while more advanced options involve string literals, parentheses, the + operator, f-strings, the textwrap module, and join() method to handle long strings within collections like dictionaries and lists. Let’s get started with the simple techniques first: 👇 Basic Multiline Strings … Read more
Problem Formulation Picture this: you’re extracting data from an XML file with a series of percentages. But your percentages look something like this: You’ve successfully extracted the data, but these percentages are tagged with the “%” symbol, making them strings rather than numbers. Now, let’s say you want to do something like: But with that … Read more
You can use the re module in Python to use regular expressions. Here’s an example of how you can use it to find <h1>…</h1> in a string: The output is ‘My First Heading’: In this example, the re.findall() function returns all non-overlapping matches of pattern in string, as a list of strings. The string is … Read more
Imagine you have a project that requires you to process tons of text files, and these files are scattered throughout your folder hierarchy. By the time you finish reading this article, you’ll be equipped with the knowledge to efficiently fetch all the .txt files in any folder using Python. Method 1: The Os Module The … Read more