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Python: Syntax errors

If a Python program is written syntactically incorrectly, the interpreter displays a message. It also points to the file and line where the error occurred.

**A syntactic error occurs when code is written in violation of grammatical rules. In natural languages, grammar is important, but text with errors can usually be understood and read. In programming everything is strict. The slightest violation and the program will not even run. An example would be the forgotten ;, incorrectly placed brackets and other details.

Here is a sample code with a syntax error:


If we run the code above, we see the following message:

$ python
File "", line 1
SyntaxError: EOL while scanning string literal

On the one hand, syntax errors are the easiest, because they are related to the grammatical rules of writing code, not to the meaning of the code. They are easy to fix: you just need to find a violation in the writing. On the other hand, the interpreter is not always able to clearly indicate this violation. Therefore it happens that a forgotten parenthesis must be placed in the wrong place, where the error message indicates.


This assignment is not directly related to the lesson. But it will be useful to practice with the output on the screen.


What Is Dead May Never Die
The exercise doesn't pass checking. What to do? 😶

If you've reached a deadlock it's time to ask your question in the «Discussions». How ask a question correctly:

  • Be sure to attach the test output, without it it's almost impossible to figure out what went wrong, even if you show your code. It's complicated for developers to execute code in their heads, but having a mistake before their eyes most probably will be helpful.
In my environment the code works, but not here 🤨

Tests are designed so that they test the solution in different ways and against different data. Often the solution works with one kind of input data but doesn't work with others. Check the «Tests» tab to figure this out, you can find hints at the error output.

My code is different from the teacher's one 🤔

It's fine. 🙆 One task in programming can be solved in many different ways. If your code passed all tests, it complies with the task conditions.

In some rare cases, the solution may be adjusted to the tests, but this can be seen immediately.

I've read the lessons but nothing is clear 🙄

It's hard to make educational materials that will suit everyone. We do our best but there is always something to improve. If you see a material that is not clear to you, describe the problem in “Discussions”. It will be great if you'll write unclear points in the question form. Usually, we need a few days for corrections.

By the way, you can participate in courses improvement. There is a link below to the lessons course code which you can edit right in your browser.


  • Syntax errors violation of the grammatical rules of the programming language.

  • SyntaxError (parsing error) the type of errors in Python that occur when there are syntax errors in the code.

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