In Python, there are a couple of approaches you can take to check whether a variable is a string. The two common methods involve using the type() function and the isinstance() function. Method 1: Using the type() Function To determine if a variable is a string using the type() function, follow these steps: name = "Roger" if type(name) == str: print("The variable is a string.") else: print("The variable is not a string....
When it comes to reading the content of a file in Python, there are a few important things to keep in mind. In this article, we’ll walk you through the process of efficiently reading a file’s content using Python. To begin, the first step is to open the file using Python’s open() global function. This function takes in two parameters: the file path and the mode. For reading purposes, we’ll use the read (r) mode....
If you’re using macOS, you may have noticed that it comes with an outdated version of Python 2 installed by default. Fortunately, you can easily install the latest version of Python 3 on your Mac. In this blog post, we’ll walk you through the process step by step. By installing Xcode, the Apple Development IDE, you will have Python 3 installed at /usr/bin/python3. You can check the version of Python 3 installed by running python3 in your terminal....
Listing files and folders in a directory is a common task in Python programming. In this tutorial, we will explore different methods to accomplish this. Using the os.listdir() Method The built-in os module in Python provides the listdir() method, which can be used to retrieve a list of files and folders in a given directory. Here’s an example: import os dirname = '/users/Flavio/dev' files = os.listdir(dirname) print(files) In the above code, we import the os module and set the dirname variable to the desired directory path....
In Python, there are three global functions that can be quite useful when working with collections: map(), filter(), and reduce(). In this blog post, we will focus on how to use the filter() function. Note: In some cases, using list comprehensions can be a more intuitive and Pythonic approach. The filter() function takes an iterable as input and returns a filter object, which is another iterable that contains only the items that pass a given filtering condition....
In Python, there are three useful global functions - map(), filter(), and reduce() - that we can use to work with collections. map() is specifically used to apply a function to each item in an iterable, such as a list, and create a new list with the same number of items, but with modified values. Let’s take a look at an example that demonstrates the use of map(). Suppose we have a list of numbers [1, 2, 3], and we want to double each number in the list....
When working with Python, there may come a time when you need to write content to a file. In this article, we will explore how you can accomplish this task. Let’s get started. Opening the File To write content to a file, you first need to open it using the open() function. This function takes two parameters: the file path and the mode. The mode determines how the file will be treated when opened....
Python is a comprehensive programming language with a vast collection of utilities in its standard library. However, sometimes we need additional functionality that is not built-in. This is where 3rd party packages come into play. Packages are created and made available as open-source software by individuals and companies for the Python community. These packages are hosted on the Python Package Index (PyPI) at https://pypi.org, and can be easily installed using pip, the package installer for Python....
People often ask me which programming language they should start with: JavaScript or Python. As a senior developer and author of books on both JavaScript and Python, I can tell you that both languages are great options for beginners and extremely popular in the industry. However, there are certain differences between them that can help you make an informed decision. JavaScript, being the language of the web, has a significant advantage in frontend development....
Python has a built-in data type called “bool” that represents boolean values. A boolean value can have one of two possible states: True or False (both capitalized). For example: done = False done = True Booleans are particularly useful when working with conditional control structures like if statements. They allow you to perform different actions based on the truthiness or falsiness of a condition. Here’s an example: done = True if done: # run some code here else: # run some other code When evaluating a value to determine if it’s True or False, Python has specific rules based on the type of value being checked:...