Fix file handling to prevent ValueError #1001
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- Replaced manual file open/close with `with` statement to ensure proper resource management. - Removed redundant file read operation after the file was closed. - Resolved `ValueError: I/O operation on closed file` and addressed terminal crashing issue during execution.
TeachMeTW
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Summary
This PR resolves an issue where improper file handling caused the following error:
ValueError: I/O operation on closed filewhen running
runAllTests.shThe error occurred because the code attempted to read from a file after it had already been closed. The issue was present both in the original code, which didn’t explicitly close the file, and in a later version where a redundant file read was placed after the file had been closed by a
withstatement.Changes Made
withstatements for proper resource management and automatic file closing.query_string = "".join(query_file.readlines())line that attempted to read the file after it had been closed.query_stringis fully assigned within the scope of thewithblock.Impact
ValueError: I/O operation on closed file.How to Test
ValueErrorexceptions in the logs.Affected #993