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
Python Lookahead You might find yourself working with regular expressions in Python, and the lookahead feature is quite handy in many situations. Lookahead comes in two flavors: positive lookahead and negative lookahead. Let’s explore these types of lookahead and see how you can use them in your Python code! 🐍 Positive lookahead is an assertion … Read more
Method 1: Replace non-ASCII characters with a Single Space When working with Python 🐍, one may come across the need to replace non-ASCII characters with a single space in a given string. Removing these characters helps maintain consistency and avoid encoding issues in data processing tasks. Let’s dive into a simple method for achieving this … Read more
Python’s regex capturing groups allow you to extract parts of a string that match a pattern. For example: match = re.search(r'(\d+)’, ‘abc123’) captures the digits, and match.group(1) returns ‘123’. One of the powerful aspects of Python’s regular expression capabilities is the use of capturing groups. By using capturing groups, you can easily extract specific portions … Read more
In this article, I will cover accessing multiple matches of a regex group in Python. 💡 Regular expressions (regex) are a powerful tool for text processing and pattern matching, making it easier to work with strings. When working with regular expressions in Python, we often need to access multiple matches of a single regex group. … Read more
Working with dates is a common task in programming, and Python provides robust tools for handling them. One such tool is regular expressions, which can be used to match and validate date strings in a specific format. In this article, we will explore how to use Python regex patterns to match dates in the “YYYY-MM-DD” … Read more
The easiest way to extract numbers from a Python string s is to use the expression re.findall(‘\d+’, s). For example, re.findall(‘\d+’, ‘hi 100 alice 18 old 42’) yields the list of strings [‘100′, ’18’, ’42’] that you can then convert to numbers using int() or float(). There are some tricks and alternatives, so keep reading … Read more
Problem Formulation Given a string – sentence. How many words does the string sentence have within it? Examples: INPUT sentence = “Finxter helps you to master Python.” OUTPUT Number of words: 6 INPUT sentence = “””Lorem ipsum dolor sit amet. Consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.””” OUTPUT … Read more
Lazy as I am, I name all temporary code files code.py when I try something in Python. Today, once again, I needed to find one of my code.py files because of a code snippet I was interested in. Being a Python enthusiast, I wondered: 👉 How can I find all files that match a certain … Read more
✨Summary: There are four different ways to split a text into sentences:🚀 Using nltk module🚀 Using re.split()🚀 Using re.findall() 🚀 Using replace Minimal Example Problem Formulation Problem: Given a string/text containing numerous sentences; How will you split the string into sentences? Example: Let’s visualize the problem with the help of an example. Method 1: Using … Read more
Summary: The different methods to split a string using regex are: Minimal Example Problem Formulation 📜Problem: Given a string and a delimiter. How will you split the string using the given delimiter using different functions from the regular expressions library? Example: In the following example, the given string has to be split using a hyphen … Read more
🍎Summary: You can split a string at parenthesis using re.split(r'[()]’, text) in a list comprehension accordingly. Minimal Example Problem Formulation 📜Problem: Given a string. How will you split the string at parenthesis and spaces? Example In the above problem, you have been given a string separated by spaces and there are certain strings that are … Read more