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Table of contents
1.
Introduction
2.
Sep parameter in Python
2.1.
Python
3.
Working of SEP in Python
3.1.
Syntax
3.2.
Python
3.3.
Examples
3.4.
Python
3.4.1.
Output
4.
end and flush in Python
4.1.
Example
4.2.
Python
4.2.1.
Output
4.3.
Example
4.4.
Python
4.4.1.
Output
4.5.
Example
4.6.
Python
4.6.1.
Output
4.7.
Example
4.8.
Python
4.8.1.
Output
4.9.
Python
5.
Difference between sep and end
6.
Frequently asked questions
6.1.
What does SEP =' mean in Python?
6.2.
What is the default SEP value in the print command?
6.3.
What is the use of SEP in Python?
6.4.
What does SEP \T mean?
6.5.
What is the default value of SEP in Python?
7.
Conclusion
Last Updated: Mar 27, 2024
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Sep() parameter in Python

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Introduction

In Python programming, understanding the sep() parameter is key to formatting output efficiently. sep() allows developers to control how elements are separated when they're printed or concatenated. 

We've all written numerous print statements in Python, with and without parameters. But have you ever wondered why sep is used in the print statement? Or are you just hearing it for the first time? 

This article will guide you through the working of sep in python. Also, it will clear all your doubts regarding the print statement.

sep in python

So, let us start understanding the sep in python.

Sep parameter in Python

Whenever you try to print something using the print function in python, the result looks like this: 

  • Python

Python

print("a", "b", sep = '.')

 

OUTPUT

1 2

By default, there is a whitespace between the numbers. It is a soft space feature that can be modified to any character, integer, or String as per our choice. Now, how can we achieve this? We can accomplish this by using SEP in python, which can only be found in python 3.x or later. It is also used to format the output statement. 

Let us now see the working of SEP in python: 

You can also read about the Exceptions & Errors in Python

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Working of SEP in Python

Here we will discuss the syntax and some examples to illustrate the working of sep in python: 

Syntax

  • Python

Python

print("something", "something", .., sep = "character to be inserted")

Examples

  • Python

Python

#code for disabling the soft space feature
print("Coding", "Ninjas", sep = '@')

#for formatting a date
print('25','12','2001', sep='/')

#for formatting the numbers
print(21, 25, sep = '#')

Output

output

There are more parameters like sep which do exist in python. As we know, In python 3, print() is now a function and its output can be controlled by using arguments.

We have already studied about sep parameter, it's now time to discuss the end and flush parameters that format the output statement.

Also read about Short-Circuiting in Python

end and flush in Python

By default, print() appends a \n to the end of the output. The end parameter allows you to change this.

Example

  • Python

Python

print ("Hello, Ninja!")
print(1,2)

Output

output

As you can see above, by default, the print() is adding a line for the next print statement.

Let us now change this as per our choice using the end parameter:

Example

  • Python

Python

print ("Hello, Ninja!", end = ' ')
print(1,2)

Output

output

When sep is used with the end parameter, the output statement becomes amazing. 

Example

  • Python

Python

print ("Hello, Ninja!", "How are you doing?", sep = ' ', end = ' ')
print("Coding Ninjas is an amazing platform for Coding")


Output

output

You can use sep and end together to generate lists, CSV output, bulleted lists, and more.

Note: The output of print() is saved in a buffer. When the end parameter is changed, the buffer is no longer flushed. You must also use the flush=True parameter to ensure that you get output as soon as print() is called.

The default value is "False," which means that if we don't use the flush parameter, then flushing of the stream will be False. If we specify "True," the stream flushes.

"flush" is available in Python 3.x and later versions.

Also read about - Convert String to List Python

Example

  • Python

Python

from time import sleep
# output is not flushed here
print("Hello Ninja!", end='')
sleep(5)
print("Bye!!!")


Output

output

You've noticed something isn't right. Yes! "Hello Ninja!" and "Bye!!!" are printing all at once.

To resolve this issue, set the flush parameter to "True". If that's the case, the stream will be flushed.

  • Python

Python

from time import sleep
# output is not flushed here
print("Hello Ninja!", end='', flush = True)
sleep(5)
print("Bye!!!")


Output

output

 

You can try it on online python compiler.

Difference between sep and end

Let us note down the points of difference between sep and end as follows:

sep end
It defines the separating character between the values when the user is printing multiple values. It defines what is to be printed at the end of the print() function to control the line breaks.
Example: print("a""b", sep = '.') will print: a.b Example: print("a""b", end=".")will print

Also see, Python Operator Precedence

Frequently asked questions

What does SEP =' mean in Python?

In Python, the sep parameter is actually an argument within the print() function. It specifies the separator between the values being printed in Python. By default, it is set to a space character, but you can customize it.

What is the default SEP value in the print command?

The default value of SEP in the print command is ' ' – a space.

What is the use of SEP in Python?

The sep parameter is primarily used to format and add a separator between strings that must be printed on the console. Python 3 is the first version to include this feature.

What does SEP \T mean?

"SEP \T" doesn't have a specific meaning in Python. It appears to be a string with the characters "SEP" followed by a backslash and a "T" character. In Python, backslashes are typically used for escape sequences, but "\T" isn't a recognized escape sequence.

What is the default value of SEP in Python?

In Python, the sep parameter determines the separator between the values passed to the print() function. By default, the sep parameter is set to a single space character (' '), meaning that elements passed to print() are separated by spaces unless otherwise specified.

Conclusion

In this article, we have discussed Sep() Parameter in Python. The sep() parameter in Python offers valuable flexibility in formatting output. By allowing developers to customize the separators between printed or concatenated elements, it enhances code readability and presentation. 

Recommended Readings: ping command in linux

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