Given a list of elements. If you print the list to the shell using
print([1, 2, 3]), the output is enclosed in square brackets like so:
[1, 2, 3]. But you want the list without brackets like so:
1, 2, 3.
print([1, 2, 3]) # Output: [1, 2, 3] # Desired: 1, 2, 3
How to print the list without enclosing brackets?
Method 1: Unpacking
The asterisk operator
* is used to unpack an iterable into the argument list of a given function. You can unpack all list elements into the
print() function to print each of them individually. Per default, all print arguments are separated by an empty space. For example, the expression
print(*my_list) will print the elements in
my_list, empty-space separated, without the enclosing square brackets!
my_list = [1, 2, 3] print(*my_list) # Output: 1 2 3
To master the basics of unpacking, feel free to check out this video on the asterisk operator:
Method 2: Unpacking with Separator
To print a comma-separated list without enclosing square brackets, the most Pythonic way is to unpack all list values into the
print() function and use the
sep=', ' argument to separate the list elements with a comma and a space. Specifically, the expression
print(*my_list, sep=', ') will print the list elements without brackets and with a comma between subsequent list elements.
my_list = [1, 2, 3] print(*my_list, sep=', ') # Output: 1, 2, 3
You can learn about the ins and outs of the built-in
print() function in the following video:
Method 3: Slicing String Representation
Slicing is a concise way to access a subsequence from an original sequence. You can use slicing on the string representation of a list to access all characters except the first and last ones—that are the square bracket characters. For example, the expression
print(str([1, 2, 3])[1:-1]) prints the list as
"1, 2, 3" without enclosing square brackets.
my_list = [1, 2, 3] print(str(my_list)[1:-1]) # Output: 1, 2, 3
Feel free to dive into slicing next to boost your coding skills:
Method 4: String Join With Generator Expression
You can print a list without brackets by combining the
string.join() method on the separator string
', ' with a generator expression to convert each list element to a string using the
str() built-in function. Specifially, the expression
print(', '.join(str(x) for x in my_list)) prints
my_list to the shell without enclosing brackets.
my_list = [1, 2, 3] print(', '.join(str(x) for x in my_list)) # Output: 1, 2, 3
You can modify the separator string on which you join to customize the appearance of the list:
my_list = [1, 2, 3] print(' '.join(str(x) for x in my_list)) # Output: 1 2 3
string.join(iterable)method concatenates the elements in the given iterable.
str(object)built-in function converts a given object to its string representation.
- Generator expressions or list comprehensions are concise one-liner ways to create a new iterable based by reusing elements from another iterable.
You can dive deeper into generators in the following video:
Where to Go From Here?
Enough theory. Let’s get some practice!
Coders get paid six figures and more because they can solve problems more effectively using machine intelligence and automation. To become more successful in coding, solve more real problems for real people. That’s how you polish the skills you really need in practice. After all, what’s the use of learning theory that nobody ever needs?
You build high-value coding skills by working on practical coding projects!
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If your answer is YES!, consider becoming a Python freelance developer! It’s the best way of approaching the task of improving your Python skills—even if you are a complete beginner.
Join my free webinar “How to Build Your High-Income Skill Python” and watch how I grew my coding business online and how you can, too—from the comfort of your own home.
While working as a researcher in distributed systems, Dr. Christian Mayer found his love for teaching computer science students.
To help students reach higher levels of Python success, he founded the programming education website Finxter.com. He’s author of the popular programming book Python One-Liners (NoStarch 2020), coauthor of the Coffee Break Python series of self-published books, computer science enthusiast, freelancer, and owner of one of the top 10 largest Python blogs worldwide.
His passions are writing, reading, and coding. But his greatest passion is to serve aspiring coders through Finxter and help them to boost their skills. You can join his free email academy here.