Handle negative time.sleep values#5906
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WalkthroughThe changes update the Changes
Sequence Diagram(s)sequenceDiagram
participant PythonCode
participant time_sleep
participant TryFromObject
participant RustDuration
PythonCode->>time_sleep: Call sleep(seconds)
time_sleep->>TryFromObject: Convert seconds to Duration
TryFromObject->>TryFromObject: Check if value is negative
alt Negative value
TryFromObject-->>time_sleep: Return ValueError("negative duration")
time_sleep-->>PythonCode: Raise ValueError("sleep length must be non-negative")
else Non-negative value
TryFromObject-->>time_sleep: Return Duration
time_sleep->>RustDuration: Sleep for Duration
time_sleep-->>PythonCode: Return successfully
end
Assessment against linked issues
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Summary of Changes
Hello @ever0de, 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 addresses issue #5895 by ensuring that negative values passed to the time.sleep function are correctly handled. It introduces validation at the Duration conversion level to prevent negative durations from being created and refines the error message presented to the user when time.sleep receives a negative argument, providing a clearer and more consistent experience.
Highlights
- Input Validation for
DurationConversion: Implemented robust checks within theTryFromObjectimplementation forstd::time::Duration. This now prevents the creation ofDurationobjects from negative Python float or integer values, raising aValueErrorwith the message "negative duration" if such an attempt is made. - Enhanced
time.sleepError Handling: Thetime.sleepfunction (for both Unix and non-Unix platforms) has been updated to accept a generic Python object. It now performs explicit type conversion toDurationand includes specific error handling to catch the "negative duration"ValueErrorfrom theDurationconversion. This error is then re-raised with a more user-friendly message: "sleep length must be non-negative", aligning with standard Python behavior.
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Code Review
This pull request implements handling for negative sleep values by raising a ValueError. The changes in vm/src/convert/try_from.rs to detect negative numbers when converting to a Duration are well-implemented. The error handling logic for sleep in vm/src/stdlib/time.rs is duplicated across the unix and not(unix) implementations. Refactoring this for better readability and to address the duplication is recommended.
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merged commit 240f87a
into
RustPython:main
Jul 7, 2025
Reviewers
+1 more reviewer
2 participants
resolved #5895
Summary by CodeRabbit
Bug Fixes
New Features
Refactor
sleepfunction to accept a wider range of Python objects for specifying sleep duration, increasing flexibility in usage.