Update main.py #13
Update main.py #13
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Note Other AI code review bot(s) detectedCodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review. WalkthroughThe change modifies the base-case return in the Changes
Estimated code review effort🎯 1 (Trivial) | ⏱️ ~5 minutes
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Pre-merge checks and finishing touches❌ Failed checks (1 warning, 1 inconclusive)
✅ Passed checks (1 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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Summary of ChangesHello @visz11, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request contains a single-line modification to the Highlights
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Code Review
This pull request introduces a critical bug into the nth_fibonacci_util function. The change replaces a correct return value with a reference to an undefined variable m, which will cause a NameError at runtime. I have provided a comment and a code suggestion to fix this issue by reverting to the original, correct implementation.
| # Base case: if n is 0 or 1, return n | ||
| if n <= 1: | ||
| return n | ||
| return m |
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The variable m is not defined within the scope of the nth_fibonacci_util function. This will cause a NameError when the function is called with n <= 1. The correct implementation for the base case of the Fibonacci sequence is to return n.
| return m | |
| return n |
Refacto PR SummaryFixed critical bug in Fibonacci calculation function where variable 'n' was incorrectly changed to 'm' in base case return statement. This change breaks the mathematical correctness of the memoized Fibonacci algorithm by returning an undefined variable instead of the input parameter. Key Changes:
Change HighlightsClick to expand
Sequence DiagramsequenceDiagram
participant C as Caller
participant F as nth_fibonacci_util
participant M as Memo Table
C->>F: nth_fibonacci_util(n, memo)
F->>F: Check if n <= 1
alt Base Case (n <= 1)
F->>F: return m (ERROR: undefined)
F-->>C: NameError Exception
else Recursive Case
F->>M: Check memo[n]
alt Already computed
M-->>F: Cached value
F-->>C: Return cached result
else Not computed
F->>F: Recursive calls
F->>M: Store result
F-->>C: Return computed result
end
end
Testing GuideClick to expand
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| # Base case: if n is 0 or 1, return n | ||
| if n <= 1: | ||
| return n | ||
| return m |
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Suggestion: In the base case of the memoized Fibonacci helper, the function returns m, which is not defined in this scope; this will raise a NameError at runtime and also contradicts the comment that the base case should return n, so the return value should be n instead. [logic error]
Severity Level: Minor
| return m | |
| return n |
Why it matters? ⭐
The current helper nth_fibonacci_util returns m when n <= 1, but m is not defined anywhere in the function or module — this is a real runtime NameError and contradicts the intended base case (should return n). Replacing it with return n fixes a functional bug and aligns with the surrounding comments and other Fibonacci implementations in the file.
Prompt for AI Agent 🤖
This is a comment left during a code review.
**Path:** main.py
**Line:** 21:21
**Comment:**
*Logic Error: In the base case of the memoized Fibonacci helper, the function returns `m`, which is not defined in this scope; this will raise a NameError at runtime and also contradicts the comment that the base case should return `n`, so the return value should be `n` instead.
Validate the correctness of the flagged issue. If correct, How can I resolve this? If you propose a fix, implement it and please make it concise.
Nitpicks 🔍
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| # Base case: if n is 0 or 1, return n | ||
| if n <= 1: | ||
| return n | ||
| return m |
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Fix undefined variable in nth_fibonacci_util base case (should return n).
The base case comment says "return n", but the code returns m, which is undefined and will raise a NameError whenever this branch executes.
Suggested fix:
def nth_fibonacci_util(n, memo):
# Base case: if n is 0 or 1, return n
if n <= 1:
- return m
+ return n📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| # Base case: if n is 0 or 1, return n | |
| if n <= 1: | |
| return n | |
| return m | |
| def nth_fibonacci_util(n, memo): | |
| # Base case: if n is 0 or 1, return n | |
| if n <= 1: | |
| return n |
🧰 Tools
🪛 Ruff (0.14.8)
21-21: Undefined name m
(F821)
🤖 Prompt for AI Agents
In main.py around lines 19 to 21, the base case in nth_fibonacci_util
incorrectly returns an undefined variable `m` instead of `n`; update the return
expression to return `n` (i.e., when n <= 1, return n) so the base case matches
the comment and avoids a NameError.
CodeAnt-AI Description
Base case in Fibonacci helper now returns wrong variable causing runtime errors for small inputs
What Changed
Impact
✅ Runtime error when computing Fibonacci(0) or Fibonacci(1)✅ Incorrect Fibonacci results for small inputs✅ Scripts/tests that call the helper for base cases can fail💡 Usage Guide
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