python single line assignment if

How to Write the Python if Statement in one Line

• online practice

Have you ever heard of writing a Python if statement in a single line? Here, we explore multiple ways to do exactly that, including using conditional expressions in Python.

The if statement is one of the most fundamental statements in Python. In this article, we learn how to write the Python if in one line.

The if is a key piece in writing Python code. It allows developers to control the flow and logic of their code based on information received at runtime. However, many Python developers do not know they may reduce the length and complexity of their if statements by writing them in a single line.

For this article, we assume you’re somewhat familiar with Python conditions and comparisons. If not, don’t worry! Our Python Basics Course will get you up to speed in no time. This course is included in the Python Basics Track , a full-fledged Python learning track designed for complete beginners.

We start with a recap on how Python if statements work. Then, we explore some examples of how to write if statements in a single line. Let’s get started!

How the if Statement Works in Python

Let’s start with the basics. An if statement in Python is used to determine whether a condition is True or False . This information can then be used to perform specific actions in the code, essentially controlling its logic during execution.

The structure of the basic if statement is as follows:

The <expression> is the code that evaluates to either True or False . If this code evaluates to True, then the code below (represented by <perform_action> ) executes.

Python uses whitespaces to indicate which lines are controlled by the if statement. The if statement controls all indented lines below it. Typically, the indentation is set to four spaces (read this post if you’re having trouble with the indentation ).

As a simple example, the code below prints a message if and only if the current weather is sunny:

The if statement in Python has two optional components: the elif statement, which executes only if the preceding if/elif statements are False ; and the else statement, which executes only if all of the preceding if/elif statements are False. While we may have as many elif statements as we want, we may only have a single else statement at the very end of the code block.

Here’s the basic structure:

Here’s how our previous example looks after adding elif and else statements. Change the value of the weather variable to see a different message printed:

How to Write a Python if in one Line

Writing an if statement in Python (along with the optional elif and else statements) uses a lot of whitespaces. Some people may find it confusing or tiresome to follow each statement and its corresponding indented lines.

To overcome this, there is a trick many Python developers often overlook: write an if statement in a single line !

Though not the standard, Python does allow us to write an if statement and its associated action in the same line. Here’s the basic structure:

As you can see, not much has changed. We simply need to “pull” the indented line <perform_action> up to the right of the colon character ( : ). It’s that simple!

Let’s check it with a real example. The code below works as it did previously despite the if statement being in a single line. Test it out and see for yourself:

Writing a Python if Statement With Multiple Actions in one Line

That’s all well and good, but what if my if statement has multiple actions under its control? When using the standard indentation, we separate different actions in multiple indented lines as the structure below shows:

Can we do this in a single line? The surprising answer is yes! We use semicolons to separate each action in the same line as if placed in different lines.

Here’s how the structure looks:

And an example of this functionality:

Have you noticed how each call to the print() function appears in its own line? This indicates we have successfully executed multiple actions from a single line. Nice!

By the way, interested in learning more about the print() function? We have an article on the ins and outs of the print() function .

Writing a Full Python if/elif/else Block Using Single Lines

You may have seen this coming, but we can even write elif and else statements each in a single line. To do so, we use the same syntax as writing an if statement in a single line.

Here’s the general structure:

Looks simple, right? Depending on the content of your expressions and actions, you may find this structure easier to read and understand compared to the indented blocks.

Here’s our previous example of a full if/elif/else block, rewritten as single lines:

Using Python Conditional Expressions to Write an if/else Block in one Line

There’s still a final trick to writing a Python if in one line. Conditional expressions in Python (also known as Python ternary operators) can run an if/else block in a single line.

A conditional expression is even more compact! Remember it took at least two lines to write a block containing both if and else statements in our last example.

In contrast, here’s how a conditional expression is structured:

The syntax is somewhat harder to follow at first, but the basic idea is that <expression> is a test. If the test evaluates to True , then <value_if_true> is the result. Otherwise, the expression results in <value_if_false> .

As you can see, conditional expressions always evaluate to a single value in the end. They are not complete replacements for an if/elif/else block. In fact, we cannot have elif statements in them at all. However, they’re most helpful when determining a single value depending on a single condition.

Take a look at the code below, which determines the value of is_baby depending on whether or not the age is below five:

This is the exact use case for a conditional expression! Here’s how we rewrite this if/else block in a single line:

Much simpler!

Go Even Further With Python!

We hope you now know many ways to write a Python if in one line. We’ve reached the end of the article, but don’t stop practicing now!

If you do not know where to go next, read this post on how to get beyond the basics in Python . If you’d rather get technical, we have a post on the best code editors and IDEs for Python . Remember to keep improving!

You may also like

How Do You Write a SELECT Statement in SQL?

What Is a Foreign Key in SQL?

Enumerate and Explain All the Basic Elements of an SQL Query

How to use python if else in one line with examples

How do I write a simple python if else in one line? What are ternary operator in Python? Can we use one liner for complex if and else statements?

In this tutorial I will share different examples to help you understand and learn about usage of ternary operator in one liner if and else condition with Python. Conditional expressions (sometimes called a “ ternary operator ”) have the lowest priority of all Python operations. Programmers coming to Python from C, C++, or Perl sometimes miss the so-called ternary operator ?:. It’s most often used for avoiding a few lines of code and a temporary variable for simple decisions.

I will not go into details of generic ternary operator as this is used across Python for loops and control flow statements. Here we will concentrate on learning python if else in one line using ternary operator

Python if else in one line

The general syntax of single if and else statement in Python is:

Now if we wish to write this in one line using ternary operator, the syntax would be:

In this syntax, first of all the else condition is evaluated.

• If condition returns True then value_when_true is returned
• If condition returns False then value_when_false is returned

Similarly if you had a variable assigned in the general if else block based on the condition

The same can be written in single line:

Here as well, first of all the condition is evaluated.

• if condition returns True then true-expr is assigned to value object
• if condition returns False then false-expr is assigned to value object

For simple cases like this, I find it very nice to be able to express that logic in one line instead of four. Remember, as a coder, you spend much more time reading code than writing it, so Python's conciseness is invaluable.

Some important points to remember:

• You can use a ternary expression in Python, but only for expressions , not for statements
• You cannot use Python if..elif..else block in one line.
• The name " ternary " means there are just 3 parts to the operator: condition , then , and else .
• Although there are hacks to modify if..elif..else block into if..else block and then use it in single line but that can be complex depending upon conditions and should be avoided
• With if-else blocks , only one of the expressions will be executed.
• While it may be tempting to always use ternary expressions to condense your code, realise that you may sacrifice readability if the condition as well as the true and false expressions are very complex.

Python Script Example

This is a simple script where we use comparison operator in our if condition

• First collect user input in the form of integer and store this value into b
• If b is greater than or equal to 0 then return " positive " which will be True condition
• If b returns False i.e. above condition was not success then return " negative "
• The final returned value i.e. either " positive " or " negative " is stored in object a
• Lastly print the value of value a

The multi-line form of this code would be:

Python if..elif..else in one line

Now as I told this earlier, it is not possible to use if..elif..else block in one line using ternary expressions. Although we can hack our way into this but make sure the maximum allowed length of a line in Python is 79 as per PEP-8 Guidelines

We have this if..elif..else block where we return expression based on the condition check:

We can write this if..elif..else block in one-line using this syntax:

In this syntax,

• First of all condition2 is evaluated, if return True then expr2 is returned
• If condition2 returns False then condition1 is evaluated, if return True then expr1 is returned
• If condition1 also returns False then else is executed and expr is returned

As you see, it was easier if we read this in multi-line if..elif..else block while the same becomes hard to understand for beginners.

We can add multiple if else block in this syntax, but we must also adhere to PEP-8 guidelines

Python Script Example-1

In this sample script we collect an integer value from end user and store it in " b ". The order of execution would be:

• If the value of b is less than 0 then " neg " is returned
• If the value of b is greater than 0 then " pos " is returned.
• If both the condition return False , then " zero " is returned

The multi-line form of the code would be:

Output(when if condition is True )

Output(when if condition is False and elif condition is True )

Output(when both if and elif condition are False )

Python script Example-2

We will add some more else blocks in this sample script, the order of the check would be in below sequence :

• Collect user input for value b which will be converted to integer type
• If value of b is equal to 100 then return " equal to 100 ", If this returns False then next if else condition would be executed
• If value of b is equal to 50 then return " equal to 50 ", If this returns False then next if else condition would be executed
• If value of b is equal to 40 then return " equal to 40 ", If this returns False then next if else condition would be executed
• If value of b is greater than 100 then return " greater than 100 ", If this returns False then next go to else block
• Lastly if all the condition return False then return " less than hundred "

The multi-line form of this example would be:

Python nested if..else in one line

We can also use ternary expression to define nested if..else block on one line with Python.

If you have a multi-line code using nested if else block , something like this:

The one line syntax to use this nested if else block in Python would be:

Here, we have added nested if..elif..else inside the else block using ternary expression. The sequence of the check in the following order

• If condition1 returns True then expr1 is returned, if it returns False then next condition is checked
• If condition-m returns True then expr-m is returned, if it returns False then else block with nested if..elif..else is checked
• If condition3 returns True then expr3 is returned, if it returns False then next condition inside the nested block is returned
• If condition-n returns True then expr-n is returned, if it returns False then expr5 is returned from the else condition

In this example I am using nested if else inside the else block of our one liner. The order of execution will be in the provided sequence:

• First of all collect integer value of b from the end user
• If the value of b is equal to 100 then the if condition returns True and " equal to 100 " is returned
• If the value of b is equal to 50 then the elif condition returns True and " equal to 50 " is returned
• If both if and elif condition returns False then the else block is executed where we have nested if and else condition
• Inside the else block , if b is greater than 100 then it returns " greater than 100 " and if it returns False then " less than 100 " is returned

In this tutorial we learned about usage of ternary operator in if else statement to be able to use it in one line. Although Python does not allow if..elif..else statement in one line but we can still break it into if else and then use it in single line form. Similarly we can also use nested if with ternary operator in single line. I shared multiple examples to help you understand the concept of ternary operator with if and else statement of Python programming language

Lastly I hope this tutorial guide on python if else one line was helpful. So, let me know your suggestions and feedback using the comment section.

Deepak Prasad

He is the founder of GoLinuxCloud and brings over a decade of expertise in Linux, Python, Go, Laravel, DevOps, Kubernetes, Git, Shell scripting, OpenShift, AWS, Networking, and Security. With extensive experience, he excels in various domains, from development to DevOps, Networking, and Security, ensuring robust and efficient solutions for diverse projects. You can reach out to him on his LinkedIn profile or join on Facebook page.

Can't find what you're searching for? Let us assist you.

Enter your query below, and we'll provide instant results tailored to your needs.

If my articles on GoLinuxCloud has helped you, kindly consider buying me a coffee as a token of appreciation.

For any other feedbacks or questions you can send mail to [email protected]

Thank You for your support!!

Leave a Comment Cancel reply

Save my name and email in this browser for the next time I comment.

Notify me via e-mail if anyone answers my comment.

Python If-Else Statement in One Line - Ternary Operator Explained

Single-line conditionals in python here’s when to and when not to use them.

Python isn’t the fastest programming language out there, but boy is it readable and efficient to write. Everyone knows what conditional statements are, but did you know you can write if statements in one line of Python code? As it turns out you can, and you’ll learn all about it today.

After reading, you’ll know everything about Python’s If Else statements in one line. You’ll understand when to use them, and when it’s best to avoid them and stick to conventional conditional statements.

Don’t feel like reading? Watch my video instead:

Want to get hired as a data scientist? Running a data science blog might help:

Can Blogging About Data Science Really Get You Hired as a Data Scientist?

What’s Wrong With the Normal If Statement?

Absolutely nothing. Splitting conditional statements into multiple lines of code has been a convention for ages. Most programming languages require the usage of curly brackets, and hence the single line if statements are not an option. Other languages allow writing only simple conditionals in a single line.

And then there’s Python. Before diving into If Else statements in one line, let’s first make a short recap on regular conditionals.

For example, you can check if a condition is true with the following syntax:

The variable age is less than 18 in this case, so Go home. is printed to the console. You can spice things up by adding an else condition that gets evaluated if the first condition is False :

This time age is greater than 18, so Welcome! gets printed to the console. Finally, you can add one or multiple elif conditions. These are used to capture the in-between cases. For example, you can print something entirely different if age is between 16 (included) and 18 (excluded):

The variable age is 17, which means the condition under elif is True , hence Not sure... is printed to the console.

Pretty basic stuff, so we naturally don’t want to spend so many lines of code writing it. As it turns out, you can use the ternary operator in Python to evaluate conditions in a single line.

Ternary Operator in Python

A ternary operator exists in some programming languages, and it allows you to shorten a simple If-Else block. It takes in 3 or more operands:

• Value if true - A value that’s returned if the condition evaluates to True.
• Condition - A boolean condition that has to be satisfied to return value if true.
• Value if false - A value that’s returned if the condition evaluates to False. In code, it would look like this:

You can even write else-if logic in Python’s ternary operator. In that case, the syntax changes slightly:

I have to admit - it looks a bit abstract when written like this. You’ll see plenty of practical examples starting from the next section.

One-Line If Statement (Without Else)

A single-line if statement just means you’re deleting the new line and indentation. You’re still writing the same code, with the only twist being that it takes one line instead of two.

Note: One-line if statement is only possible if there’s a single line of code following the condition. In any other case, wrap the code that will be executed inside a function.

Here’s how to transform our two-line if statement to a single-line conditional:

As before, age is less than 18 so Go home. gets printed.

What if you want to print three lines instead of one? As said before, the best practice is to wrap the code inside a function:

One-line if statements in Python are pretty boring. The real time and space saving benefit happens when you add an else condition.

You’ll benefit the most from one-line if statements if you add one or multiple else conditions.

One-Line If-Else Statement

Now we can fully leverage the power of Python’s ternary operator. The code snippet below stores Go home. to a new variable outcome if the age is less than 18 or Welcome! otherwise:

As you would guess, Welcome! is printed to the console as age is set to 19. If you want to print multiple lines or handle more complex logic, wrap everything you want to be executed into a function - just as before.

You now have a clear picture of how the ternary operator works on a simple one-line if-else statement. We can add complexity by adding more conditions to the operator.

One-Line If-Elif-Else Statement

Always be careful when writing multiple conditions in a single line of code. The logic will still work if the line is 500 characters long, but it’s near impossible to read and maintain it.

You should be fine with two conditions in one line, as the code is still easy to read. The following example prints Go home. if age is below 16, Not Sure... if age is between 16 (included) and 18 (excluded), and Welcome otherwise:

You’ll see Not sure... printed to the console, since age is set to 17. What previously took us six lines of code now only takes one. Neat improvement, and the code is still easy to read and maintain.

What else can you do with one-line if statements? Well, a lot. We’ll explore single-line conditionals for list operations next.

Example: One-Line Conditionals for List Operations

Applying some logic to a list involves applying the logic to every list item, and hence iterating over the entire list. Before even thinking about a real-world example, let’s see how you can write a conditional statement for every list item in a single line of code.

How to Write IF and FOR in One Line

You’ll need to make two changes to the ternary operator:

Surround the entire line of code with brackets [] Append the list iteration code (for element in array) after the final else Here’s how the generic syntax looks like:

It’s not that hard, but let’s drive the point home with an example. The following code snippet prints + if the current number of a range is greater than 5 and - otherwise. The numbers range from 1 to 10 (included):

Image 1 - If and For in a single line in Python (image by author)

Let’s now go over an additional real-world example.

Example: Did Student Pass the Exam?

To start, we’ll declare a list of students. Each student is a Python dictionary object with two keys: name and test score:

We want to print that the student has passed the exam if the score is 50 points or above. If the score was below 50 points, we want to print that the student has failed the exam.

In traditional Python syntax, we would manually iterate over each student in the list and check if the score is greater than 50:

Image 2 - List iteration with traditional Python syntax (image by author)

The code works, but we need 5 lines to make a simple check and store the results. You can use your newly-acquired knowledge to reduce the amount of code to a single line:

Image 3 - One-line conditional and a loop with Python (image by author)

The results are identical, but we have a much shorter and neater code. It’s just on the boundary of being unreadable, which is often a tradeoff with ternary operators and single-line loops. You often can’t have both readable code and short Python scripts.

Just because you can write a conditional in one line, it doesn’t mean you should. Readability is a priority. Let’s see in which cases you’re better off with traditional if statements.

Be Careful With One-Line Conditionals

Just because code takes less vertical space doesn’t mean it’s easier to read. Now you’ll see the perfect example of that claim.

The below snippet checks a condition for every possible grade (1-5) with a final else condition capturing invalid input. The conditions take 12 lines of code to write, but the entire snippet is extremely readable:

As expected, you’ll see Grade = 1 printed to the console, but that’s not what we’re interested in. We want to translate the above snippet into a one-line if-else statement with the ternary operator.

It’s possible - but the end result is messy and unreadable:

This is an example of an extreme case where you have multiple conditions you have to evaluate. It’s better to stick with the traditional if statements, even though they take more vertical space.

Take home point: A ternary operator with more than two conditions is just a nightmare to write and debug.

And there you have it - everything you need to know about one-line if-else statements in Python. You’ve learned all there is about the ternary operator, and how to write conditionals starting with a single if to five conditions in between.

Remember to keep your code simple. The code that’s easier to read and maintain is a better-written code at the end of the day. Just because you can cram everything into a single line, doesn’t mean you should. You’ll regret it as soon as you need to make some changes.

An even cleaner way to write long conditionals is by using structural pattern matching - a new feature introduced in Python 3.10. It brings the beloved switch statement to Python for extra readability and speed of development.

What do you guys think of one-line if-else statements in Python? Do you use them regularly or have you switched to structural pattern matching? Let me know in the comment section below.

if-elif-else statement on one line in Python

Last updated: Apr 9, 2024 Reading time · 4 min

# Table of Contents

• If-Elif-Else statement on one line in Python
• Shorthand if-else statement in Python

# If-Elif-Else statement on one line in Python

Use a nested ternary operator to implement an if-elif-else statement on one line.

The first ternary should check for a condition and if the condition is not met, it should return another ternary that does the job of an elif/else statement.

The ternary operator is very similar to an if/else statement.

The example checks if the name variable is falsy and if it is, the string "James Doe" is returned, otherwise, the name variable is returned.

# Using nested ternaries in Python

To have an inline if-elif-else statement, we have to use a nested ternary.

You can wrap the statement in parentheses to make it more readable.

The first ternary in the example checks if the variable stores a value greater than 100 .

If the condition is met, the number 10 gets returned.

The nested ternary operator checks if the variable is less than 100 .

If the condition is met, the number 20 is returned, otherwise, 0 is returned.

Here is another example.

If the condition isn't met, the else statement runs and the nested ternary checks for another condition.

The nested ternary checks if the variable stores a value of less than 100 and if the condition is met, the string b gets returned. This is the elif statement.

If the condition isn't met, the else statement runs and the string c gets returned.

# The equivalent of the nested ternary in an if-elif-else statement

Here is how we would implement the ternary operator of the example using if/elif/else statements.

Using if-elif-else statements is a bit more readable, but it is also a bit more verbose.

Whether using a nested ternary operator makes your code more readable depends on the complexity of the conditions you are checking for.

Using the shorthand syntax isn't always recommended.

# Shorthand if-else statement in Python

The ternary operator can also be used if you need a shorthand if-else statement.

The ternary operator will return the value to the left if the condition is met, otherwise, the value in the else statement is returned.

The operator in the example checks if variable1 is greater than variable2 .

Here is the same code sample but using the longer form syntax.

# a if condition else b

The syntax of the ternary operator is a if condition else b .

You can also store the result in a variable.

The example checks if the name variable is falsy and if it is the string "bobby hadz" is returned, otherwise the name variable is returned.

I've also written an article on how to check for multiple conditions in an if statement .

# Additional Resources

You can learn more about the related topics by checking out the following tutorials:

• Styling multiline 'if' statements in Python
• Get the first item in a list that matches condition - Python
• Find the index of Elements that meet a condition in Python
• Using f-string for conditional formatting in Python
• Check if all/any elements in List meet condition in Python
• ValueError: Circular reference detected in Python [Solved]
• Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)
• Python argparse: unrecognized arguments error [Solved]
• How to exit an if statement in Python [5 Ways]

Borislav Hadzhiev

Web Developer

Copyright © 2024 Borislav Hadzhiev

How to create a one line if-else statement in Python

by Nathan Sebhastian

Posted on Feb 22, 2023

Reading time: 3 minutes

To create a one line if-else statement in Python, you need to use the ternary operator syntax as follows:

The ternary operator in Python is used to return an expression a or b based on the condition that’s defined in your code.

The following tutorial shows you examples of creating one line if statements in practice.

Writing a one line if-else statement

Let’s see an example that’s easy to understand. Suppose you create a program for a bank, and you want to determine if a person is old enough to apply for a bank account.

In most countries, a person needs to be 18 years or older, so you can use an if-else statement as follows:

The above code prints a different message based on the value of the age variable.

Next, let’s rewrite the same code using the ternary operator:

In the above example, the if statement checks if the value of age is greater than or equal to 18 . If it is, the expression evaluates to the string “Welcome!”. If it’s not, the expression evaluates to the string “Sorry. Not allowed!”.

While a regular if statement puts the condition first and then the expression after, a ternary condition requires you to put the expression first before the if keyword.

The ternary operator also supports an elif condition, but the syntax is hard to read as follows:

Again, let’s see an example with a regular if-elif-else statement first.

Suppose you have a program that determines whether the day is Saturday, Sunday, or a weekday and assigns a different activity to each day:

You can rewrite the code above using ternary operator as follows:

I’m sure you’re perplexed by the ternary conditions above. While the ternary operator can handle multiple conditions, it’s not recommended because it sacrifices readability.

You can separate the ternary conditions by wrapping them in parentheses as follows:

But I believe the regular if-elif-else statement is far easier to read than the ternary statement shown above.

You should only use ternary operators for simple statements that have one condition, ideally with no mathematical operations.

Suppose you have conditions that involve numbers like this:

If you convert the conditional above using ternary, here’s the result:

Oops.. that’s just nauseating to read. As the saying goes, “With great power comes great responsibility.”

Even though you can create a one liner if-else statement in Python, you need to exercise caution when using it.

If you write a one line if-else statement that has many conditionals with complex rules, your code will be hard to read and understand.

Python allows you to write a one line if-else statement by using the ternary operator syntax. But you need to be careful as writing complex conditionals using the ternary operator makes your code confusing.

I hope this tutorial is helpful. See you in other tutorials! 👋

Take your skills to the next level ⚡️

I'm sending out an occasional email with the latest tutorials on programming, web development, and statistics. Drop your email in the box below and I'll send new stuff straight into your inbox!

Hello! This website is dedicated to help you learn tech and data science skills with its step-by-step, beginner-friendly tutorials. Learn statistics, JavaScript and other programming languages using clear examples written for people.

Learn more about this website

Connect with me on Twitter

Or LinkedIn

Type the keyword below and hit enter

Click to see all tutorials tagged with:

• Free Python 3 Tutorial
• Control Flow
• Exception Handling
• Python Programs
• Python Projects
• Python Interview Questions
• Python Database
• Data Science With Python
• Machine Learning with Python
• Break a long line into multiple lines in Python
• How to Convert Bytes to String in Python ?
• One Liner for Python if-elif-else Statements
• Working with Highlighted Text in Python .docx Module
• Paragraph Formatting In Python .docx Module
• Working With Text In Python .docx Module
• Working with Headers And Footers in Python .docx Module
• Working with Titles and Heading - Python docx Module
• Working with Images - Python .docx Module
• Working with Page Break - Python .docx Module
• Working with Tables - Python .docx Module
• Network Programming Python - HTTP Requests
• Upgrading from Python2 to Python3 on MacOS
• Highlight a Bar in Bar Chart using Altair in Python
• When not to use Recursion while Programming in Python?
• Using Certbot Manually for SSL certificates
• Biopython - Entrez Database Connection
• How to clear Tkinter Canvas?
• Python program to implement Half Subtractor

Assigning multiple variables in one line in Python

A variable is a segment of memory with a unique name used to hold data that will later be processed. Although each programming language has a different mechanism for declaring variables, the name and the data that will be assigned to each variable are always the same. They are capable of storing values of data types.

The assignment operator(=) assigns the value provided to its right to the variable name given to its left. Given is the basic syntax of variable declaration:

 Assign Values to Multiple Variables in One Line

Given above is the mechanism for assigning just variables in Python but it is possible to assign multiple variables at the same time. Python assigns values from right to left. When assigning multiple variables in a single line, different variable names are provided to the left of the assignment operator separated by a comma. The same goes for their respective values except they should be to the right of the assignment operator.

While declaring variables in this fashion one must be careful with the order of the names and their corresponding value first variable name to the left of the assignment operator is assigned with the first value to its right and so on. 

Variable assignment in a single line can also be done for different data types.

Not just simple variable assignment, assignment after performing some operation can also be done in the same way.

Assigning different operation results to multiple variable.

Here, we are storing different characters in a different variables.

Please Login to comment...

Similar reads.

• python-basics
• Technical Scripter 2020
• Technical Scripter
• 10 Best Slack Integrations to Enhance Your Team's Productivity
• 10 Best Zendesk Alternatives and Competitors
• 10 Best Trello Power-Ups for Maximizing Project Management
• Google Rolls Out Gemini In Android Studio For Coding Assistance
• 30 OOPs Interview Questions and Answers (2024)

Improve your Coding Skills with Practice

What kind of Experience do you want to share?

ModuleNotFoundError: No module named 'ProductionAPI'

I’m relatively new to python. I cloned a repo called ‘Python’ from git. It has a script called AllScan.py within a folder(Name:SampleScripts). I have another file called ProductionAPI.py which is not located in any folder and is directly in this “Python” repo. This AllScan.py script calls one of the function in ProductionAPI.py(I have imported like this “from ProductionAPI import ProductionAPI”). This repo “Python” has multiple folders in it. Now, the problem is when I try to run my script AllScan.py from command line using a cmd like (py SampleScripts/AllScan.py) it throws a ModuleNotFoundError. It works fine in pycharm though. Can anybody please help me resolve this issue ?

Actual Error: D:Python>py SampleScripts/AllScan.py Traceback (most recent call last): File “D:\Python\SampleScripts\AllScan.py”, line 8, in from ProductionAPI import ProductionAPI ModuleNotFoundError: No module named ‘ProductionAPI’

I’m relatively new to python. I cloned a repo called ‘Python’ from git. It has a script called AllScan.py within a folder(Name:SampleScripts). I have another file called ProductionAPI.py which is not located in any folder and is directly in this “Python” repo. This AllScan.py script calls one of the function in ProductionAPI.py(I have imported like this “from ProductionAPI import ProductionAPI”). This repo “Python” has multiple folders in it. Now, the problem is when I try to run my script AllScan.py from command line using a cmd like (py SampleScripts/AllScan.py) it throws a ModuleNotFoundError.

Python finds modules by searching in folders named in the PYTHONPATH environment variable, and then in the standard places for the Python interpreter itself (the venv lib if you have one, the stdlib it shipped with).

When you run a script on the command line, the folder of the script is prepended to the search path, letting the script import files in the same folder as the script.

If you want to use more .py files, their folder needs to be in the PYTHONPATH. The URL below suggests that on Windows you can modify it like this:

as described here:

I would prepend your top level folder rather than appending it.

Likely your PYTHONPATH is empty or unset anyway, so you could just go:

Try that and see if the behaviour improves.

You can inspect what path Python ends up searching from inside your test script like this:

That will let you see everything, and whether your modifications to PYTHONPATH are having the desired effect.

It works fine in pycharm though.

PyCharm is likely making these arrangements for you.

The links and discussion in this thread may be helpful:

Related Topics

Python One Line If Not None

To assign the result of a function get_value() to variable x if it is different from None , use the Walrus operator if tmp := get_value(): x = tmp within a single-line if block. The Walrus operator assigns the function’s return value to the variable tmp and returns it at the same time, so that you can check and assign it to variable x subsequently.

Problem : How to assign a value to a variable if it is not equal to None —using only a single line of Python code?

Example : Say, you want to assign the return value of a function get_value() , but only if it doesn’t return None . Otherwise, you want to leave the value as it is.

Here’s a code example:

While this works, you need to execute the function get_value() twice which is not optimal. An alternative would be to assign the result of the get_value() function to a temporary variable to avoid repeated function execution:

However, this seems clunky and ineffective. Is there a better way?

Let’s have an overview of the one-liners that conditionally assign a value to a given variable:

Exercise : Run the code. Does it always generate the same result?

Method 1: Ternary Operator + Semicolon

The most basic ternary operator x if c else y consists of three operands x , c , and y . It is an expression with a return value. The ternary operator returns x if the Boolean expression c evaluates to True . Otherwise, if the expression c evaluates to False , the ternary operator returns the alternative y .

You can use the ternary operator to solve this problem in combination with the semicolon to write multiple lines of code as a Python one-liner.

You cannot run the get_value() function twice—to check whether it returns True and to assign the return value to the variable x . Why? Because it’s nondeterministic and may return different values for different executions.

Therefore, the following code would be a blunt mistake:

The variable x may still be None —even after the ternary operator has seemingly checked the condition.

Related articles:

• Python Ternary
• Python Single-Line If Statement
• Python Semicolon

Method 2: Walrus + One-Line-If

A beautiful extension of Python 3.8 is the Walrus operator . The Walrus operator := is an assignment operator with return value. Thus, it allows you to check a condition and assign a value at the same time:

This is a very clean, readable, and Pythonic way. Also, you don’t have the redundant identity assignment in case the if condition is not fulfilled.

Related Article: The Walrus Operator in Python 3.8

Python One-Liners Book: Master the Single Line First!

Python programmers will improve their computer science skills with these useful one-liners.

Python One-Liners will teach you how to read and write “one-liners”: concise statements of useful functionality packed into a single line of code. You’ll learn how to systematically unpack and understand any line of Python code, and write eloquent, powerfully compressed Python like an expert.

The book’s five chapters cover (1) tips and tricks, (2) regular expressions, (3) machine learning, (4) core data science topics, and (5) useful algorithms.

Detailed explanations of one-liners introduce key computer science concepts and boost your coding and analytical skills . You’ll learn about advanced Python features such as list comprehension , slicing , lambda functions , regular expressions , map and reduce functions, and slice assignments .

You’ll also learn how to:

• Leverage data structures to solve real-world problems , like using Boolean indexing to find cities with above-average pollution
• Use NumPy basics such as array , shape , axis , type , broadcasting , advanced indexing , slicing , sorting , searching , aggregating , and statistics
• Calculate basic statistics of multidimensional data arrays and the K-Means algorithms for unsupervised learning
• Create more advanced regular expressions using grouping and named groups , negative lookaheads , escaped characters , whitespaces, character sets (and negative characters sets ), and greedy/nongreedy operators
• Understand a wide range of computer science topics , including anagrams , palindromes , supersets , permutations , factorials , prime numbers , Fibonacci numbers, obfuscation , searching , and algorithmic sorting

By the end of the book, you’ll know how to write Python at its most refined , and create concise, beautiful pieces of “Python art” in merely a single line.

Get your Python One-Liners on Amazon!!

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 that has taught exponential skills to millions of coders worldwide. He’s the author of the best-selling programming books Python One-Liners (NoStarch 2020), The Art of Clean Code (NoStarch 2022), and The Book of Dash (NoStarch 2022). Chris also coauthored the Coffee Break Python series of self-published books. He’s a 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.

How to make two print code in one line?

How can I make two print code in one line?

I tried making print(“hello”) + print(“hello again”) but its not working. Can someone help me?

If you want them to output on one line, either concatenate them or pass both as parameters to one statement.

The second line would actually print a double space in the output, the comma already separates the arguments in the final output.

Yeah, I decided to write the same message despite the double space just for simplicity. I don’t really know why I did it though. Thanks for pointing it out, though.