Unexpected indentation как исправить

Python uses spacing at the start of the line to determine when code blocks start and end. Errors you can get are:

Unexpected indent. This line of code has more spaces at the start than the one before, but the one before is not the start of a subblock (e.g., the if, while, and for statements). All lines of code in a block must start with exactly the same string of whitespace. For instance:

>>> def a():
...   print "foo"
...     print "bar"
IndentationError: unexpected indent

This one is especially common when running Python interactively: make sure you don’t put any extra spaces before your commands. (Very annoying when copy-and-pasting example code!)

>>>   print "hello"
IndentationError: unexpected indent

Unindent does not match any outer indentation level. This line of code has fewer spaces at the start than the one before, but equally it does not match any other block it could be part of. Python cannot decide where it goes. For instance, in the following, is the final print supposed to be part of the if clause, or not?

>>> if user == "Joey":
...     print "Super secret powers enabled!"
...   print "Revealing super secrets"
IndendationError: unindent does not match any outer indentation level

Expected an indented block. This line of code has the same number of spaces at the start as the one before, but the last line was expected to start a block (e.g., if, while, for statements, or a function definition).

>>> def foo():
... print "Bar"
IndentationError: expected an indented block

If you want a function that doesn’t do anything, use the “no-op” command pass:

>>> def foo():
...     pass

Mixing tabs and spaces is allowed (at least on my version of Python), but Python assumes tabs are 8 characters long, which may not match your editor. Don’t mix tabs and spaces. Most editors allow automatic replacement of one with the other. If you’re in a team, or working on an open-source project, see which they prefer.

The best way to avoid these issues is to always use a consistent number of spaces when you indent a subblock, and ideally use a good IDE that solves the problem for you. This will also make your code more readable.

Introduction

Indentation is a crucial part of writing code in Python. It is used to define blocks of code, such as loops and functions. However, if the indentation is inconsistent, it can lead to unexpected behavior and errors. In this tutorial, we will discuss how to resolve IndentationError: unexpected Indent in Python.

IndentationError: unexpected indent in Python.

What Causes the error?

Unexpected indent error can occur due to several reasons. Some of the most common causes are:

  • Copying and pasting code from different sources
  • Using different text editors with different tab settings
  • Manually indenting the code

How to Detect it?

To detect IndentationError: Unexpected indent in your code, you can use the built-in python -t command. This command will check your code for any inconsistent indentation and print a warning message with the line number and column of the error.

For example:

$ python -t file.py
  File "file.py", line 4
    print("Hello, World!")
    ^
IndentationError: unexpected indent

In this example, the error occurred on line 4, and the error message indicates that there is an unexpected indent.

To resolve Unexpected indent error, you need to ensure that the code is indented consistently throughout the entire file. There are several ways to achieve this:

  1. Use a Text Editor with Automatic Indentation: Some text editors, such as Sublime Text, have a feature to automatically indent code. This can be very useful in resolving Unexpected indent, as it ensures that the code is indented consistently every time you press the tab key.
  2. Use a Consistent Tab Size: If you are manually indenting the code, it is important to use a consistent tab size throughout the entire file. For example, if you are using a tab size of 4 spaces, make sure that you are using 4 spaces for all indentations.
  3. Remove Extra Indentation: If the code has extra indentation, you can remove it by using the backspace key.
  4. Use a Linter: A linter is a tool that checks code for potential errors and inconsistencies, including inconsistent indentation. Some popular linters for Python include PyLint and Flake8.

Here’s an example of how to resolve Unexpected indent using a text editor with automatic indentation:

# Inconsistent Indentation
def hello():
print("Hello, World!")

# Resolved Indentation
def hello():
    print("Hello, World!")

In this example, the indentation was inconsistent, but by using a text editor with automatic indentation, the code was indented consistently.

See also: Fix Error: metadata-generation-failed in Python

Conclusion

Inconsistent indentation can lead to unexpected behavior and errors in Python. To resolve it, you need to ensure that the code is indented consistently throughout the entire file. You can use a text editor with automatic indentation, a consistent tab size, or a linter to resolve inconsistent indentation.

IndentationError: Unexpected Intent in Python – FAQs

What is an IndentationError: unexpected indent in Python?

IndentationError: Unexpected indent in Python refers to code that is indented in different ways within the same file. This can lead to unexpected behavior and errors in the code.

How do I detect IndentationError: unexpected indent in my code?

To detect IndentationError: Unexpected indent in your code, you can use the built-in python -t command. This command will check your code for any inconsistent indentation and print a warning message with the line number and column of the error.

How do I resolve IndentationError: unexpected indent in my code?

To resolve IndentationError: unexpected indent, you need to ensure that the code is indented consistently throughout the entire file. You can use a text editor with automatic indentation, a consistent tab size, or a linter to resolve inconsistent indentation. You can also remove extra indentation by using the backspace key.

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Table of Contents
Hide
  1. What are the reasons for IndentationError: unexpected indent?
    1. Python and PEP 8 Guidelines 
  2. Solving IndentationError: expected an indented block
  3. Example 1 – Indenting inside a function
  4. Example 2 – Indentation inside for, while loops and if statement
  5. Conclusion

Python language emphasizes indentation rather than using curly braces like other programming languages. So indentation matters in Python, as it gives the structure of your code blocks, and if you do not follow it while coding, you will get an indentationerror: unexpected indent.

What are the reasons for IndentationError: unexpected indent?

IndentationError: unexpected indent mainly occurs if you use inconsistent indentation while coding. There are set of guidelines you need to follow while programming in Python. Let’s look at few basic guidelines w.r.t indentation.

Python and PEP 8 Guidelines 

  1. Generally, in Python, you follow the four spaces rule according to PEP 8 standards
  2. Spaces are the preferred indentation method. Tabs should be used solely to remain consistent with code that is already indented with tabs.
  3. Do not mix tabs and spaces. Python disallows the mixing of indentation.
  4. Avoid trailing whitespaces anywhere because it’s usually invisible and it causes confusion.

Solving IndentationError: expected an indented block

Now that we know what indentation is and the guidelines to be followed, Let’s look at few indentation error examples and solutions.

Example 1 – Indenting inside a function

Lines inside a function should be indented one level more than the “def functionname”. 

# Bad indentation inside a function

def getMessage():
message= "Hello World"
print(message)
  
getMessage()

# Output
  File "c:ProjectsTryoutslistindexerror.py", line 2
    message= "Hello World"
    ^
IndentationError: expected an indented block

Correct way of indentation while creating a function.

# Proper indentation inside a function

def getMessage():
    message= "Hello World"
    print(message)
  
getMessage()

# Output
Hello World

Example 2 – Indentation inside for, while loops and if statement

Lines inside a for, if, and while statements should be indented more than the line, it begins the statement so that Python will know when you are inside the loop and when you exit the loop.

Suppose you look at the below example inside the if statement; the lines are not indented properly. The print statement is at the same level as the if statement, and hence the IndentationError.

# Bad indentation inside if statement
def getMessage():
    foo = 7
    if foo > 5:
    print ("Hello world")
  
getMessage()

# Output
  File "c:ProjectsTryoutslistindexerror.py", line 4
    print ("Hello world")
    ^
IndentationError: expected an indented block

To fix the issues inside the loops and statements, make sure you add four whitespaces and then write the lines of code. Also do not mix the white space and tabs these will always lead to an error.

# Proper indentation inside if statement
def getMessage():
    foo = 7
    if foo > 5:
        print ("Hello world")
  
getMessage()

# Output
Hello world

Conclusion

The best way to avoid these issues is to always use a consistent number of spaces when you indent a subblock and ideally use a good IDE that solves the problem for you.

Avatar Of Srinivas Ramakrishna

Srinivas Ramakrishna is a Solution Architect and has 14+ Years of Experience in the Software Industry. He has published many articles on Medium, Hackernoon, dev.to and solved many problems in StackOverflow. He has core expertise in various technologies such as Microsoft .NET Core, Python, Node.JS, JavaScript, Cloud (Azure), RDBMS (MSSQL), React, Powershell, etc.

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Автор оригинала: Chris.

Если вы похожи на меня, вы сначала попробуйте все в своем коде и исправить ошибки, как они приходят. Одна частая ошибка в Python – IndentationError: неожиданный отступ Отказ Итак, что означает это сообщение об ошибке?

Ошибка . IndentationError: неожиданный отступ Возникает, если вы используете непоследовательную отступ вкладок или пробелы для блоков кода с отступом, таких как Если блок и для петля. Например, Python бросит ошибку вдавливания, если вы используете для петля с три персонажа пробелов Отступ для первой строки и Один символ вкладок отступ второй строки корпуса петли. Чтобы устранить ошибку, используйте одинаковое количество пустых пробелов для всех блоков кода с отступом.

Давайте посмотрим на пример, где возникает эта ошибка:

for i in range(10):
  print(i)
   print('--')

Первая строка в корпусе петли использует два пробела в качестве уровня вдавливания. Вторая строка в корпусе петлей использует три персонажа пробелов в качестве уровня отступа. Таким образом, блоки вдавливания различны для разных линий того же блока. Однако Python ожидает, что все линии с отступом имеют структурно те же отступ.

Чтобы исправить ошибку, просто используйте одинаковое количество пробелов для каждой строки кода:

for i in range(10):
    print(i)
    print('--')

Общая рекомендация состоит в том, чтобы использовать четыре единственных пробелных персонажей '' для каждого Отступ уровень. Если у вас вложенные уровни вдавливания, это означает, что второй уровень вдавливания имеет одновение пробелы:

for i in range(10):
    for j in range(10):
        print(i, j)

Смесительные вкладки и пробелы частоты часто вызывают ошибку

Общая проблема также в том, что вдавливание, по-видимому, является последовательным – пока это не так. Следующий код имеет один символ вкладки в первой строке и четырех пустых пробеле во второй строке блока кода с отступом. Они выглядят одинаково, но Python все еще бросает ошибку вдавливания.

На первый взгляд углубление выглядит одинаково. Однако, если вы пройдете пробелы перед Печать (I) , вы видите, что он состоит только из одного табличного характера, в то время как пробелы перед Распечатать (j) Заявление состоит из ряда пустых мест '' Отказ

Попробуйте сами: Прежде чем я скажу вам, что делать с этим, попробуйте исправить код себя в нашей интерактивной оболочке Python:

Упражнение : Исправьте код в оболочке интерактивного кода, чтобы избавиться от сообщения об ошибке.

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Как исправить ошибку отступа на все времена?

Источник ошибки часто является неправильным использованием вкладок и пробеловных символов. Во многих редакторах кода вы можете установить символ вкладки на фиксированное количество символов пробела. Таким образом, вы, по сути никогда не используете сам табличный символ. Например, если у вас есть Sublime Text Editor, следующее быстрое руководство гарантирует, что вы никогда не будете работать в этой ошибке:

  • Установить Возвышенный текст Использовать вкладки для отступа: Вид -> Отступ -> Преобразовать вдавшиеся вкладки
  • Снимите флажок Опция Отступ с использованием пробелов в том же подменю выше.

Куда пойти отсюда?

Достаточно теории, давайте познакомимся!

Чтобы стать успешным в кодировке, вам нужно выйти туда и решать реальные проблемы для реальных людей. Вот как вы можете легко стать шестифункциональным тренером. И вот как вы польские навыки, которые вам действительно нужны на практике. В конце концов, что такое использование теории обучения, что никто никогда не нуждается?

Практические проекты – это то, как вы обостряете вашу пилу в кодировке!

Вы хотите стать мастером кода, сосредоточившись на практических кодовых проектах, которые фактически зарабатывают вам деньги и решают проблемы для людей?

Затем станьте питоном независимым разработчиком! Это лучший способ приближения к задаче улучшения ваших навыков Python – даже если вы являетесь полным новичком.

Присоединяйтесь к моему бесплатным вебинаре «Как создать свой навык высокого дохода Python» и посмотреть, как я вырос на моем кодированном бизнесе в Интернете и как вы можете, слишком от комфорта вашего собственного дома.

Присоединяйтесь к свободному вебинару сейчас!

Работая в качестве исследователя в распределенных системах, доктор Кристиан Майер нашел свою любовь к учению студентов компьютерных наук.

Чтобы помочь студентам достичь более высоких уровней успеха Python, он основал сайт программирования образования Finxter.com Отказ Он автор популярной книги программирования Python One-listers (Nostarch 2020), Coauthor of Кофе-брейк Python Серия самооставленных книг, энтузиаста компьютерных наук, Фрилансера и владелец одного из лучших 10 крупнейших Питон блоги по всему миру.

Его страсти пишут, чтение и кодирование. Но его величайшая страсть состоит в том, чтобы служить стремлению кодер через Finxter и помогать им повысить свои навыки. Вы можете присоединиться к его бесплатной академии электронной почты здесь.

IndentationErrors serve two purposes: they help make your code more readable and ensure the Python interpreter correctly understands your code. If you add in an additional space or tab where one is not needed, you’ll encounter an “IndentationError: unexpected indent” error.

In this guide, we discuss what this error means and why it is raised. We’ll walk through an example of this error so you can figure out how you can fix it in your program.

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IndentationError: unexpected indent

An indent is a specific number of spaces or tabs denoting that a line of code is part of a particular code block. Consider the following program:

def hello_world():
	print("Hello, world!")

We have defined a single function: hello_world(). This function contains a print statement. To indicate to Python this line of code is part of our function, we have indented it.

You can indent code using spaces or tabs, depending on your preference. You should only indent code if that code should be part of another code block. This includes when you write code in:

  • An “if…else” statement
  • A “try…except” statement
  • A “for” loop
  • A “function” statement

Python code must be indented consistently if it appears in a special statement. Python enforces indentation strictly.

Some programming languages like JavaScript do not enforce indentation strictly because they use curly braces to denote blocks of code. Python does not have this feature, so the language depends heavily on indentation.

The cause of the “IndentationError: unexpected indent” error is indenting your code too far, or using too many tabs and spaces to indent a line of code.

The other indentation errors you may encounter are:

  • Unindent does not match any other indentation level
  • Expected an indented block

An Example Scenario

We’re going to build a program that loops through a list of purchases that a user has made and prints out all of those that are greater than $25.00 to the console.

To start, let’s define a list of purchases:

 purchases = [25.50, 29.90, 2.40, 57.60, 24.90, 1.55]

Next, we define a function to loop through our list of purchases and print the ones worth over $25 to the console:

def show_high_purchases(purchases):
	   for p in purchases:
		        if p > 25.00:
			            print("Purchase: ")
				                print(p)

The show_high_purchases() function accepts one argument: the list of purchases through which the function will search. The function iterates through this list and uses an if statement to check if each purchase is worth more than $25.00.

If a purchase is greater than $25.00, the statement Purchase: is printed to the console. Then, the price of that purchase is printed to the console. Otherwise, nothing happens.

Before we run our code, call our function and pass our list of purchases as a parameter:

show_high_purchases(purchases)

Let’s run our code and see what happens:

  File "main.py", line 7
	print(p)
	^
IndentationError: unexpected indent

Our code does not run successfully.

The Solution

As with any Python error, we should read the full error message to see what is going on. The problem appears to be on line 7, which is where we print the value of a purchase.

	if p > 25.00:
			print("Purchase: ")
				    print(p)

We have incidentally indented the second print() statement. This causes an error because our second print() statement is not part of another block of code. It is still part of our if statement.

To solve this error, we need to make sure that we consistently indent all our print() statements:

	if p > 25.00:
			print("Purchase: ")
			print(p)

Both print() statements should use the same level of indentation because they are part of the same if statement. We’ve made this revision above.

Let’s try to run our code:

Purchase:
25.5
Purchase:
29.9
Purchase:
57.6

Our code successfully prints out all the purchases worth more than $25.00 to the console.

Conclusion

“IndentationError: unexpected indent” is raised when you indent a line of code too many times. To solve this error, make sure all of your code uses consistent indentation and that there are no unnecessary indents.

Now you’re ready to fix this error like a Python expert!

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