Resolving ‘indentationerror: Unexpected Indent’ In Python

Resolving ‘IndentationError: Unexpected Indent’ in Python


In Python, indentation is crucial for code organization and structure. An ‘IndentationError: Unexpected Indent’ occurs when there is an inconsistency in the indentation level of code blocks. To resolve this error, it’s essential to ensure proper and consistent indentation throughout your code.


Reason for the Error:


The error is usually caused by an incorrect amount of indentation (tabs or spaces) in the code. Python uses indentation to define code blocks and nested structures. If the indentation is unexpected or inconsistent, Python cannot interpret the code correctly.

Steps to Resolve the Error:

  1. Check Indentation Level: Ensure that the indented code is at the correct level. Each block of code within a function, loop, or class should be indented by one or more levels using either tabs or spaces.

  2. Use Consistent Indentation: Maintain consistent indentation throughout your code. Indent lines by using either tabs or spaces, but do not mix the two. Most Python code uses four spaces for indentation.

  3. Check for Extra Indentation: Remove any unnecessary indentation if a block of code is not intended to be nested within another block.

  4. Consider the Parentheses: Indentation should not extend beyond the parentheses of if statements, loops, and function definitions.


# Incorrect
if num % 2 == 0:
  print("Even")  # Indentation should be one level higher
# Correct
if num % 2 == 0:
    print("Even")  # Indentation of one level

Additional Tips:

  • Use parentheses for clarity, even if they are not required syntactically.
  • Consider using an IDE or text editor that supports auto-indentation to avoid indentation errors.
  • Adhere to the conventions of the PEP 8 style guide for Python code formatting to ensure consistency and readability.

By following these steps, you can effectively resolve ‘IndentationError: Unexpected Indent’ errors and maintain proper code structure in your Python programs.## Resolving ‘indentationerror: Unexpected Indent’ In Python

Executive Summary

This article provides a comprehensive guide to understanding and resolving the ‘indentationerror: unexpected indent’ error in Python. We will delve into the fundamentals of code indentation in Python and explore five key subtopics to effectively debug this common error.


In Python, indentation is crucial for defining code blocks and their hierarchy. The interpreter evaluates indented lines as part of a particular code block, making correct indentation essential for program flow. However, when indentations are incorrect or unexpected, it triggers the ‘indentationerror: unexpected indent’ error.

Indentation in Python

Python uses consistent indentation, typically using four spaces or one tab per indentation level. Indentation helps define logical code blocks, such as functions, loops, and classes. The interpreter evaluates indented lines as belonging to the block of the previous line. Missing or incorrect indentation breaks this structure and leads to the error.

5 Key Subtopics for Debugging

1. Consistent Indentation Style

Ensure consistent indentation style throughout your code. Use either four spaces or a tab character for every indentation level. Mixing styles or using inconsistent spacing can confuse the interpreter.

2. Remember Closing Indentation

Every indentation must have a corresponding closing indentation. For example, if a block begins with an indentation of four spaces, it must end with the same indentation level. Missing or incorrect closing indentation triggers the error.

3. Check Syntax Errors

It is crucial to check for syntax errors in your code. Syntax errors, such as missing colons, can trigger ‘indentationerror: unexpected indent’ even if indentation is technically correct. Use a code editor or run your script with syntax checking enabled.

4. Analyze Conditional Statements

Conditional statements like if-else and for loops introduce new blocks of code. Ensure that these blocks are properly indented below the conditional statement line. Incorrect indentation within these blocks can lead to unexpected indentation errors.

5. Avoid Tabs in Mixed Environments

While tabs can be used for indentation, mixing tabs and spaces in the same file can result in inconsistencies. For clarity and consistency, use either four spaces or one tab character throughout your code.


By understanding the fundamentals of code indentation in Python and addressing the key subtopics discussed above, you can effectively debug and resolve ‘indentationerror: unexpected indent’ errors. Ensure consistent indentation style, remember closing indentation, check for syntax errors, analyze conditional statements, and avoid mixed indentation formats to ensure the smooth execution of your Python code.

Keyword Phrase Tags

  • Python Indentation
  • ‘indentationerror: unexpected indent’ Error
  • Code Indentation in Python
  • Python Error Handling
  • Python Syntax Errors
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Comments 12
  1. Thanks for the clarifiction, this article has helped me solve a puzzle I was having with indentation! I think I’ve finally got the hang of it now.

  2. Amazing post! This is one of the most well writen tutorials I’ve ever read. You made it so easy to understand. Thank you, it helped me a lot!

  3. Waw, good post, You explained evething very clearly. I was struggling with this error for hours, but now it’s all clear.

  4. Good article and well written but you should have used code blocks instead of <pre> blocks and also refrain from using double-spaces after sentences, it disturbs the code’s readability.

  5. That’s not really helpfull, you didn’t cover all of the possible cases of indentation errors and this error is not common as you said.

  6. Indentation Errors are the most annoying thing ever, I think all languages should get ride of indentation and use braces instead. What do you think guys?

  7. Of cource there are more ways to solve this error! But I guess it’s not that important for you to talk about

  8. This makes no sense whatsoever, the examples are wrong and what you said about indentation is not even true, so frustrating!

  9. Finally, an article that makes sense, I was struggling with this for ever, thank you so much, this article saved me!

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