v0.40: Create exercises. Challenge the community.

delimiters_balanced

Your mission

Implement delimiters_balanced, a function that validates nested delimiters in a string.

See it in action

delimiters_balanced("build[{ok}]")

Expected result

True

Your checklist

For your own tracking. Tests grade your code.

Create delimiter_stack.py.
Expose def delimiters_balanced(text: str) -> bool:.
Treat (), [], and {} as delimiter pairs.
Characters that are not delimiters must be ignored.
Return True only when every closing delimiter matches the latest unmatched opener.
Return True for a string that contains no delimiters.

More examples

delimiters_balanced("[(])")

Expected result

False

Constraints

Expected files

delimiter_stack.py

Allowed functions

None. Write every helper yourself.

delimiters_balanced

Your mission

Implement delimiters_balanced, a function that validates nested delimiters in a string.

See it in action

delimiters_balanced("build[{ok}]")

Expected result

True

Your checklist

For your own tracking. Tests grade your code.

Create delimiter_stack.py.
Expose def delimiters_balanced(text: str) -> bool:.
Treat (), [], and {} as delimiter pairs.
Characters that are not delimiters must be ignored.
Return True only when every closing delimiter matches the latest unmatched opener.
Return True for a string that contains no delimiters.

More examples

delimiters_balanced("[(])")

Expected result

False

Constraints

Expected files

delimiter_stack.py

Allowed functions

None. Write every helper yourself.

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01Flat pairsWaiting

02Nested delimiters with ignored textWaiting

03Wrong closerWaiting

04Crossed pairsWaiting

05No delimitersWaiting

06Digits are ignoredWaiting

07Digits inside delimiter pairs are ignoredWaiting

08Unclosed openerWaiting

09Closer before openerWaiting

delimiters_balanced

Your mission

Implement delimiters_balanced, a function that validates nested delimiters in a string.

See it in action

delimiters_balanced("build[{ok}]")

Expected result

True

Your checklist

For your own tracking. Tests grade your code.

Create delimiter_stack.py.
Expose def delimiters_balanced(text: str) -> bool:.
Treat (), [], and {} as delimiter pairs.
Characters that are not delimiters must be ignored.
Return True only when every closing delimiter matches the latest unmatched opener.
Return True for a string that contains no delimiters.

More examples

delimiters_balanced("[(])")

Expected result

False

Constraints

Expected files

delimiter_stack.py

Allowed functions

None. Write every helper yourself.

v0.40: Create exercises. Challenge the community.

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delimiters_balanced

Your mission

Implement delimiters_balanced, a function that validates nested delimiters in a string.

See it in action

delimiters_balanced("build[{ok}]")

Expected result

True

Your checklist

For your own tracking. Tests grade your code.

Create delimiter_stack.py.
Expose def delimiters_balanced(text: str) -> bool:.
Treat (), [], and {} as delimiter pairs.
Characters that are not delimiters must be ignored.
Return True only when every closing delimiter matches the latest unmatched opener.
Return True for a string that contains no delimiters.

More examples

delimiters_balanced("[(])")

Expected result

False

Constraints

Expected files

delimiter_stack.py

Allowed functions

None. Write every helper yourself.

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01Flat pairsWaiting

02Nested delimiters with ignored textWaiting

03Wrong closerWaiting

04Crossed pairsWaiting

05No delimitersWaiting

06Digits are ignoredWaiting

07Digits inside delimiter pairs are ignoredWaiting

08Unclosed openerWaiting

09Closer before openerWaiting