[Tut] How to Print a List Without Brackets and Commas in Python?

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How to Print a List Without Brackets and Commas in Python?

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Problem Formulation

Given a Python listof elements.

If you print the list to the shell using

Code:

print([1, 2, 3])

, the output is enclosed in square brackets and separated by commas like so:

Code:

"[1, 2, 3]"

.

But you want the list without brackets and commas like so:

Code:

1 2 3

.

Code:

print([1, 2, 3]) # Output: [1, 2, 3] # Desired: 1 2 3

How to print the list without enclosing brackets and without separating commas in Python?

Recommended Tutorial: Howhttps://blog.finxter.com/how-to-print-a-...in-python/to Print a List Without Brackets in Python?

Method 1: Unpacking Multiple Values into Print Function

The asterisk operator

Code:

*

is used to unpack an iterableinto the argument list of a given function.

You can unpack all list elements into the

Code:

print()

function to print all values individually, separated by an empty space per default (that you can override using the

Code:

sep

argument). For example, the expression

Code:

print(*my_list)

prints the elements in

Code:

my_list

, empty space separated, without the enclosing square brackets and without the separating commas!

Here’s an example:

Code:

my_list = [1, 2, 3] print(*my_list) # Output: 1 2 3

Note: If you want a different separating character, you can set the

Code:

sep

argument of the

Code:

print()

function. For example,

Code:

print(*my_list, sep='|')

will use the vertical bar

Code:

'|'

as a separating character.

Here’s an example:

Code:

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

Code:

print()

function in the following video:



To master the basics of unpacking, feel free to check out this video on the asterisk operator:



Method 2: String Replace Method

A simple way to print a list without commas and square brackets is to first convertthe list to a string using the built-in

Code:

str()

function. Then modify the resulting string representation of the list by using the

Code:

string.replace()

method until you get the desired result.

Here’s an example:

Code:

my_list = [1, 2, 3] # Convert List to String s = str(my_list) print(s) # [1, 2, 3] # Replace Separating Commas and Square Brackets s = s.replace(', ', '\n').replace('[', '').replace(']', '') # Print List Without Commas and Brackets print(s)

The result is a string without commas and without brackets:

Code:

1 2 3

Method 3: String Join With Generator Expression

You can print a list without brackets and without commas. Use the

Code:

string.join()

method on any separator string such as

Code:

' '

or

Code:

'\t'

. Pass a generator expression to convert each list element to a string using the

Code:

str()

built-in function. For example, the expression

Code:

print(' '.join(str(x) for x in my_list))

prints

Code:

my_list

to the shell without enclosing brackets and commas.

Code:

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:

Code:

my_list = [1, 2, 3] print('xxx'.join(str(x) for x in my_list)) # Output: 1xxx2xxx3

• The
  Code:

  string.join(iterable)
  method concatenates the elements in the given iterable.
  
  
• The
  Code:

  str(object)
  built-in function converts a given object to its string representation.
  
  
• Generator expressions or list comprehensions are concise one-linerways 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!

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Programmer Humor

Code:

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❗ Answer: They read the shampoo bottle instructions:
Lather. Rinse. Repeat.