Fix pick channels crash when _orig_units is None (#11314)#14006
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CedricConday wants to merge 4 commits into
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Fix pick channels crash when _orig_units is None (#11314)#14006CedricConday wants to merge 4 commits into
CedricConday wants to merge 4 commits into
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CedricConday
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larsoner and
mscheltienne
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larsoner
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Jun 30, 2026
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| import numpy as np | ||
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| import mne |
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No need to nest these they're required by MNE
Picking/reordering channels built {k: v for ... in self._orig_units.items()}
unconditionally, raising AttributeError when _orig_units is None (as produced
by some readers / RawArray flows). Guard for a falsy _orig_units. Adds a test.
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drammock
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| info = mne.create_info(["Fp1", "Fp2", "F3", "F4"], 100.0, "eeg") | ||
| raw = mne.io.RawArray(np.zeros((4, 100)), info) |
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create_info and RawArray are already imported directly at top of file
Suggested change
| info = mne.create_info(["Fp1", "Fp2", "F3", "F4"], 100.0, "eeg") | |
| raw = mne.io.RawArray(np.zeros((4, 100)), info) | |
| info = create_info(["Fp1", "Fp2", "F3", "F4"], 100.0, "eeg") | |
| raw = RawArray(np.zeros((4, 100)), info) |
| from numpy.testing import assert_allclose, assert_array_equal, assert_equal | ||
| from scipy.io import savemat | ||
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| import mne |
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unnecessary; the two API items you use (RawArray and create_info) are already being imported directly, just a few lines down.
Address @drammock review on mne-tools#14006: create_info and RawArray are already imported directly at the top of the test module, so call them directly and remove the now-unused `import mne`. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LyuFNWN45FNffpGwsC4Su7
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Fixes #11314
What was wrong
When picking/reordering channels on a
Raw, the code rebuilds_orig_units:If
self._orig_unitsisNone(which happens with some readers andRawArrayflows), this raisesAttributeError: 'NoneType' object has no attribute 'items'. The pick itself otherwise succeeds.Fix
Only rebuild
_orig_unitswhen it is truthy; leaveNone/empty as-is.Test
Adds
test_pick_channels_orig_units_none: picking with_orig_units = Noneno longer raises. Verified it raisesAttributeErroronmainand passes with this change.AI-assisted, human-reviewed — I'm an AI engineer; I find, fix, and test with AI (Claude Code), then review and verify before opening.