Indent Expected?

There are, in fact, multiple things you need to know about indentation in Python:

Python really cares about indention.

In other languages, indention is not necessary but only serves to improve the readability. In Python, indentation is necessary and replaces the keywords begin / end or { } of other languages.

This is verified before the execution of the code. Therefore even if the code with the indentation error is never reached, it won’t work.

There are different indention errors and you reading them helps a lot:

1. IndentationError: expected an indented block

There are multiple reasons why you can have such an error, but the common reason will be:

  • You have a : without an indented block underneath.

Here are two examples:

Example 1, no indented block:

Input:

if 3 != 4:
    print("usual")
else:

Output:

  File "<stdin>", line 4

    ^
IndentationError: expected an indented block

The output states that you need to have an indented block on line 4, after the else: statement.

Example 2, unindented block:

Input:

if 3 != 4:
print("usual")

Output

  File "<stdin>", line 2
    print("usual")
        ^
IndentationError: expected an indented block

The output states that you need to have an indented block on line 2, after the if 3 != 4: statement.

2. IndentationError: unexpected indent

It is important to indent blocks, but only blocks that should be indented. This error says:

– You have an indented block without a : before it.

Example:

Input:

a = 3
  a += 3

Output:

  File "<stdin>", line 2
    a += 3
    ^
IndentationError: unexpected indent

The output states that it wasn’t expecting an indented block on line 2. You should fix this by remove the indent.

3. TabError: inconsistent use of tabs and spaces in indentation

  • But basically it’s, you are using tabs and spaces in your code.
  • You don’t want that.
  • Remove all tabs and replaces them by four spaces.
  • And configure your editor to do that automatically.
  • You can get some more info here.

Eventually, to come back on your problem:

I have it in the right indentation it still says indent expected I don’t know what to do

Just look at the line number of the error, and fix it using the previous information.

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