Refactor and cleanup restartthinner by larsevj · Pull Request #847 · equinor/subscript

larsevj · 2026-01-16T15:02:36Z

No description provided.

codecov-commenter · 2026-01-16T15:13:09Z

Codecov Report

❌ Patch coverage is 98.36066% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 83.56%. Comparing base (cb65d1f) to head (633967e).

Files with missing lines	Patch %	Lines
src/subscript/restartthinner/restartthinner.py	98.36%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #847      +/-   ##
==========================================
+ Coverage   83.46%   83.56%   +0.09%     
==========================================
  Files          49       49              
  Lines        7293     7294       +1     
==========================================
+ Hits         6087     6095       +8     
+ Misses       1206     1199       -7

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Copilot

Pull request overview

This PR refactors and modernizes the restartthinner module by improving code quality, replacing deprecated patterns, and enhancing maintainability.

Changes:

Replaced os.system() calls with subprocess.run() for better error handling and portability
Refactored find_resdata_app() to use shutil.which() instead of manual PATH traversal
Simplified date_slicer() to return a list directly instead of a dict, improving clarity

Comments suppressed due to low confidence (1)

src/subscript/restartthinner/restartthinner.py:69

There are two spelling errors in this comment: "dont't" should be "don't" and "remainding" should be "remaining".

    First unpacking a UNRST file, then deleting dates the dont't want, then
    pack the remainding files into a new UNRST file

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src/subscript/restartthinner/restartthinner.py

Copilot · 2026-01-19T09:04:13Z

src/subscript/restartthinner/restartthinner.py

@@ -41,30 +42,27 @@ def find_resdata_app(toolname: str) -> str:
    Raises:
        IOError: if tool can't be found


The docstring states "IOError: if tool can't be found" but the function raises OSError. While IOError is an alias for OSError in Python 3, the docstring should be updated to match the actual exception being raised for consistency.

Suggested change

IOError: if tool can't be found

OSError: if tool can't be found

Copilot · 2026-01-19T09:04:14Z

src/subscript/restartthinner/restartthinner.py

+def date_slicer(
+    slicedates: list, restartdates: list, restartindices: list
+) -> list[int]:
    """Make a dict that maps a chosen restart date to a report index"""


The docstring still mentions "Make a dict that maps a chosen restart date to a report index" but the function now returns a list instead of a dict. The docstring should be updated to reflect that it returns a list of restart indices.

Suggested change

"""Make a dict that maps a chosen restart date to a report index"""

"""Return a list of restart indices closest to the requested slice dates."""

Copilot

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 8 comments.

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src/subscript/restartthinner/restartthinner.py

Copilot · 2026-01-19T09:56:13Z

src/subscript/restartthinner/restartthinner.py

+    with _working_directory(rstdir):
+        tempdir = Path(tempfile.mkdtemp(dir="."))
+        try:
+            # Move UNRST into temp directory and work there
+            shutil.move(rstname, tempdir / rstname)
+
+            with _working_directory(tempdir):
+                subprocess.run(
+                    [rd_unpack, rstname],
+                    capture_output=quiet,
+                    check=True,
+                )
+
+                for file in Path(".").glob("*.X*"):
+                    index = int(file.suffix.lstrip(".X"))
+                    if index not in slicerstindices:
+                        file.unlink()
+
+                remaining_files = sorted(Path(".").glob("*.X*"))
+                subprocess.run(
+                    [rd_pack, *[str(f) for f in remaining_files]],
+                    capture_output=quiet,
+                    check=True,
+                )
+
+                # Move result back up
+                shutil.move(rstname, f"../{rstname}")
+        finally:
+            shutil.rmtree(tempdir)


If an error occurs in rd_repacker after moving the original file into the temp directory but before successfully moving it back, the original file could be lost when the temp directory is cleaned up in the finally block. This is especially problematic when keep=False. Consider creating a temporary backup inside rd_repacker or ensuring the original file is only moved after successful processing, using a different approach like working on a copy.

Copilot · 2026-01-19T09:56:14Z

src/subscript/restartthinner/restartthinner.py

+                subprocess.run(
+                    [rd_unpack, rstname],
+                    capture_output=quiet,
+                    check=True,
+                )
+
+                for file in Path(".").glob("*.X*"):
+                    index = int(file.suffix.lstrip(".X"))
+                    if index not in slicerstindices:
+                        file.unlink()
+
+                remaining_files = sorted(Path(".").glob("*.X*"))
+                subprocess.run(
+                    [rd_pack, *[str(f) for f in remaining_files]],
+                    capture_output=quiet,
+                    check=True,
+                )


The subprocess.run calls use capture_output=quiet which will be either True or False. When True, both stdout and stderr are captured and discarded. When False, they are not captured. However, this means error messages from the subprocess will be hidden when quiet=True, making debugging difficult if the subprocess fails. Consider using stdout=subprocess.DEVNULL if quiet else None and always showing stderr for better error visibility, or at least including stderr in the exception message when check=True fails.

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src/subscript/restartthinner/restartthinner.py

tests/test_restartthinner.py

src/subscript/restartthinner/restartthinner.py

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src/subscript/restartthinner/restartthinner.py

Copilot · 2026-01-19T11:20:14Z

src/subscript/restartthinner/restartthinner.py

    if numberofslices > 1:
-        slicedates = pandas.DatetimeIndex(
-            numpy.linspace(
-                pandas.Timestamp(restart_dates[0]).value,
-                pandas.Timestamp(restart_dates[-1]).value,
+        slicedates = pd.DatetimeIndex(
+            np.linspace(
+                pd.Timestamp(restart_dates[0]).value,
+                pd.Timestamp(restart_dates[-1]).value,
                int(numberofslices),
            )
        ).to_list()
    else:
        slicedates = [restart_dates[-1]]  # Only return last date if only one is wanted

-    slicerstindices = list(
-        date_slicer(slicedates, restart_dates, restart_indices).values()
-    )
-    slicerstindices.sort()
-    slicerstindices = list(set(slicerstindices))  # uniquify
+    slicerstindices = date_slicer(slicedates, restart_dates, restart_indices)
+    slicerstindices = sorted(set(slicerstindices))  # uniquify


When numberofslices equals the number of existing restart points, the date_slicer logic may still try to calculate evenly-spaced dates which could theoretically select duplicates. The sorted(set(...)) on line 179 handles this, but it means the user might get fewer restart points than requested. Consider adding a check or warning when numberofslices >= len(restart_indices) to inform the user that all restart points are being kept.

src/subscript/restartthinner/restartthinner.py

tests/test_restartthinner.py

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larsevj requested a review from Copilot January 19, 2026 09:01

larsevj marked this pull request as ready for review January 19, 2026 09:01

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larsevj force-pushed the simplify_restartthinner branch from 56537b7 to 1b28dbe Compare January 19, 2026 09:36

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larsevj force-pushed the simplify_restartthinner branch from 1b28dbe to 925b484 Compare January 19, 2026 10:06

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larsevj force-pushed the simplify_restartthinner branch from 925b484 to 633967e Compare January 19, 2026 11:05

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larsevj force-pushed the simplify_restartthinner branch from 633967e to 73c3fa3 Compare January 26, 2026 09:58

Refactor and cleanup restartthinner

c172ddf

larsevj force-pushed the simplify_restartthinner branch from 73c3fa3 to c172ddf Compare January 26, 2026 10:09

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larsevj requested a review from alifbe January 26, 2026 10:11

		@@ -41,30 +42,27 @@ def find_resdata_app(toolname: str) -> str:
		Raises:
		IOError: if tool can't be found

	IOError: if tool can't be found
	OSError: if tool can't be found

	"""Make a dict that maps a chosen restart date to a report index"""
	"""Return a list of restart indices closest to the requested slice dates."""

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larsevj commented Jan 16, 2026

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codecov-commenter commented Jan 16, 2026 •

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