Awesome solution, definetly easier to understand than the others

Cant say for sure what is causing the issue unless you post more details or the exact code you using.

I kept getting a type error, saying the interpreter couldn't concatenate 2 types together. And I designated the str() around the index call.

thanks...i am looking for this kind of solution

Needs random tests

It's already there

Not an issue

Not enough test cases. Too many flawed solutions are accepted. Must include test cases with equal numbers of brackets but which do not balance - eg ][){(}

Description is good and gives the right background for the problem.
Including more testcases would be helpful.

There is a typo in the following line:
"Task: to make a method wich will checks if the brackets"

typo: wich
correct: which

Tests are fine.

Is the test class broken or am I just too stupid?
Always get cannot find symbol compilation error when I am trying to run tests or to submit the result.

One extra branch of execution which does nothing is "more complexity"? Well, technically it is...

True but this one has more complexity so maybe rename it to valid-braces level 2 or something
or maybe make a reference in the description.

Closing issue.