Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles on Trending Technologies
Technical articles with clear explanations and examples
What is the most elegant way to check if the string is empty in Python?
The strings are fundamental data types used to store text. When working with strings, checking if a string is empty is a common task. An empty string is a string with zero characters. There are various ways to check if a string is empty, but choosing elegant approaches helps improve code readability. Using if not string (Most Pythonic) In Python, empty strings are considered falsy, which evaluates to False in a boolean context. Using not string returns True if the string is empty ? my_string = "" if not my_string: print("The ...
Read MoreHow to check if multiple strings exist in another string in Python?
While working with strings, checking if a string exists inside another string is a common task and can be achieved using the in keyword. In this article, we'll explore different methods to check if multiple strings exist in another string in Python. For example, checking if multiple strings like "TP" and "WELCOME" exist in the string "WELCOME to TP". Python provides several approaches including any(), all(), and regular expressions. Using any() Function The any() function returns True if at least one element in an iterable is truthy. We can use it with a generator expression to check ...
Read MoreHow to create a long multi-line string in Python?
In Python, you can create long multi-line strings using several approaches. Each method has its own advantages depending on your specific use case and formatting requirements. Using Triple Quotes The most common approach is using triple quotes (''' or """). This method preserves the exact formatting including line breaks, indentation, and special characters like TAB or NEWLINES ? multiline_string = """Welcome to Tutorialspoint How are you doing? Hope everything is fine Thank you""" print("The multi-line string is:") print(multiline_string) The multi-line string is: Welcome to Tutorialspoint How are you doing? Hope everything is ...
Read MoreHow to get a function name as a string in Python?
In Python, functions are first-class objects, which means they can be passed around and manipulated like other data types (integers, strings, etc.). This allows us to inspect and retrieve function attributes, including their names as strings. To get a function name as a string, we use the built-in __name__ attribute that every function object possesses. The __name__ Attribute The __name__ attribute is a special built-in variable that stores the name of a function, class, or module as a string. For functions, it contains the original name used when defining the function. Basic Usage Here's how ...
Read MoreHow can we change the id of an immutable string in Python?
In Python, strings are immutable, which means once the string is created, it cannot be changed. Because of this immutability, any operation that tries to modify the string results in creating a new string object with a different identity. Every object in Python has a unique identity, which can be accessed by using the built-in id() function. In this article, we are going to learn about changing the id of an immutable string in Python. We cannot directly change the ID of the immutable string, but by reassigning or modifying it, we can create a new string and ...
Read MoreHow to generate random strings with upper case letters and digits in Python?
Generating random strings with uppercase letters and digits is common in Python for creating passwords, tokens, or unique identifiers. Here are several effective methods to accomplish this ? Using random.choices() The random.choices() function allows repeated character selection, making it ideal for generating random strings of any length ? import random import string # Define the length and character set length = 10 characters = string.ascii_uppercase + string.digits # Generate random string with possible duplicates result = ''.join(random.choices(characters, k=length)) print(result) 8KM2N7QX5R Using random.choice() with Loop This method builds the ...
Read MoreHow to get a variable name as a string in Python?
In Python, variables are just labels pointing to values. They don't carry any built-in metadata about their names, so there's no direct method to get a variable name as a string. However, we can achieve this by inspecting the environment using globals(), locals(), or the inspect module. Let's explore these approaches ? Using globals() Function The globals() function returns a dictionary representing the current global symbol table. We can search through this dictionary to find variable names by their values. Syntax globals() Example Here's how to find a global variable name ...
Read MoreHow to convert hex string into int in Python?
A Hexadecimal is the base-16 number system that uses the digits from '0 to 9' and letters from 'A to F'. It is commonly used in computers to represent binary data in a readable format. In this article, we will learn about converting hex strings into integers. For example, if we receive input as a hex string ("fe00") and need to convert it into an integer, Python provides multiple methods. Let's explore them one by one. Using int() Function The int() function is the most common method to convert a hex string to an integer. It accepts ...
Read MoreHow to remove specific characters from a string in Python?
When working with strings in Python, you might often find the need to remove specific characters. This could be driven by various needs such as data cleaning, formatting, or simply modifying text for output. Below are several methods to remove specific characters from a string. Using str.replace() Using a Loop Using str.translate() Using List Comprehension Using str.replace() Method The simplest way to remove specific characters from a string is to use the str.replace() method. This method allows you to replace occurrences of a ...
Read MoreHow to extract numbers from a string in Python?
Python provides several methods to extract numbers from strings. Whether you need integers, floating-point numbers, or both, these techniques will help you parse numeric data from text efficiently. Using Regular Expressions (re.findall) The most powerful approach uses regular expressions to match different number patterns ? import re # Extract integers and floats text = "The price is $29.99 and quantity is 5" numbers = re.findall(r'\d+\.\d+|\d+', text) print("String format:", numbers) # Convert to appropriate numeric types numeric_values = [] for num in numbers: if '.' in num: ...
Read More