You first learned how to create an empty string in Python, using either direct assignment or the string constructor. In this tutorial, you learned how to use Python to check if a string is empty or blank. Note that because strings in Python are immutable, the original string will not be modified. strip() method with the not keyword: # Checking if a String is Blank in Python We’ll create a string that contains a few spaces and combine the. We can then use either not keyword or the len() function to check if it’s empty. strip() method to the string, which returns a string without any whitespace. In order to do this, we first need to apply the. In this section, you’ll learn how to check if a string is both empty as well as blank, meaning that it only contains whitespace. Use strip to Check if a String is Blank in Python In the following section, you’ll learn how to check if a string is either empty or blank. Keep in mind that this only checks if a string is truly empty. Let’s see how we can use this function to check if a string is empty or not: # Using len() To Check if a String is Empty This is done using the len() function, which returns the length of an iterable object passed into it. Use len to Check if a String in Empty in Pythonīecause empty strings in Python are, well, empty, you can also check the length of a string to see if it’s empty or not. In the next section, you’ll learn how to check if a string is empty using the len() function. With this we can run an expression when a string is empty or not: # Checking if a String is Empty with an if-else What this expression evaluates to is not False, which then evaluates to True.Ī cleaner, and more practical way to write this, is using an if-else block. Empty strings in Python are considered to be falsy, meaning that they evaluate to False.īecause of this, we can easily check if a string is empty by checking its boolean truth: # Checking if a String is Empty in Python The simplest, and most Pythonic, way of checking if a string is empty in Python is to simply use an if-else block with the not keyword. Use not To Check if a String is Empty in Python To get semantics out of the way, let’s consider a string that’s made up entirely of spaces or whitespace to be “blank”. From a practical perspective, the string is empty. From a technical perspective, the string isn’t empty. Would we consider this empty? Well, it depends. Now, take a string like this for example: # Is this empty? In the examples above, the strings were truly empty. # Are Strings of Spaces Considered Empty in Python? Let’s see what this looks like and print it out: # Creating an Empty String in Python Similarly, we can use the string constructor function str() to create an empty string in Python. Let’s see what this looks like: # Creating an Empty String in Python This can be done using either single, double, or triple quotes. The simplest, and clearest, way is simply to create a string with nothing in it. In Python, you can create an empty string in a number of ways.
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