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(fix) Make bias statistics complete for all elements #4496

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@SumGuo-88 SumGuo-88 commented Dec 23, 2024

Summary by CodeRabbit

  • New Features

    • Enhanced functionality to handle and report missing elements in datasets based on atomic types.
    • Improved mapping of element types to frame indices for better data organization.
    • Introduced a new method to retrieve frames for specific element types.
  • Tests

    • Added unit tests for the make_stat_input function to ensure accurate processing of atomic types.

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📝 Walkthrough

Walkthrough

The pull request introduces modifications in the DeepMD-kit's PyTorch utility modules. In dataset.py, a new private method _build_element_to_frames is added to the DeepmdDataSetForLoader class, which constructs a mapping of element types to their corresponding frame indexes. In stat.py, the make_stat_input function is enhanced to manage missing atomic types by retrieving frame data from datasets, thereby ensuring comprehensive statistical representation across different element types. Additionally, a new test file is created to validate the functionality of the updated make_stat_input function.

Changes

File Change Summary
deepmd/pt/utils/dataset.py Added private method _build_element_to_frames() to map element types to frame indexes and added public method get_frames_for_element(). Updated constructor to call the new method.
deepmd/pt/utils/stat.py Enhanced make_stat_input() function to identify and collect data for missing atomic types from datasets.
source/tests/pt/test_make_stat_input.py Introduced unit tests for make_stat_input, including classes TestDataset and TestMakeStatInput with relevant test methods.

Possibly related PRs

  • Fix: Atomic stat with multi-system #4370: The changes in this PR enhance the handling of atomic types in the make_stat_input function, which relies on the element_to_frames attribute introduced in the main PR, establishing a direct connection between the two.
  • refactor: simplify dataset construction #4437: This PR introduces a new function construct_dataset in the DpLoaderSet class that creates instances of DeepmdDataSetForLoader, which is directly related to the new methods added in the main PR for managing element frames.

Suggested reviewers

  • njzjz
  • CaRoLZhangxy
  • wanghan-iapcm

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Actionable comments posted: 1

🧹 Nitpick comments (1)
deepmd/pt/utils/stat.py (1)

110-119: Avoid potential index-out-of-range errors when concatenating Tensors.
The code checks “isinstance(sys_stat[key], list) and isinstance(sys_stat[key][0], torch.Tensor)” without verifying that the list is non-empty. This might raise an IndexError if the list is empty. Consider adding a length check before accessing sys_stat[key][0].

Possible safe check:

-if isinstance(sys_stat[key], list) and isinstance(sys_stat[key][0], torch.Tensor):
+if isinstance(sys_stat[key], list) and len(sys_stat[key]) > 0 \
+   and isinstance(sys_stat[key][0], torch.Tensor):
📜 Review details

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📥 Commits

Reviewing files that changed from the base of the PR and between cfe17a3 and 32da243.

📒 Files selected for processing (2)
  • deepmd/pt/utils/dataset.py (1 hunks)
  • deepmd/pt/utils/stat.py (1 hunks)
🧰 Additional context used
🪛 Ruff (0.8.2)
deepmd/pt/utils/dataset.py

44-44: SyntaxError: Expected an indented block after function definition

🔇 Additional comments (3)
deepmd/pt/utils/stat.py (3)

91-96: Validate 'atype' presence and handle empty arrays gracefully.
While updating the collected elements, consider explicitly checking that each 'atype' array is non-empty. If a dataset yields an empty array, it might bypass your missing-elements logic.

✅ Verification successful

Let me gather more information about how atype is handled in the codebase.


Let me try again with the correct file type flag for ripgrep.


Based on the code analysis, I can now generate the final response:

Empty arrays are handled safely by numpy.unique and set.update
The code uses numpy.unique() which safely handles empty arrays by returning an empty array, and set.update() which safely handles empty iterables. The logic for missing elements works correctly even with empty arrays since an empty array's unique values would simply not add any elements to the set.

🏁 Scripts executed

The following scripts were executed for the analysis:

Error: No shell scripts found


Script:

#!/bin/bash
# Search for patterns related to 'atype' handling and array emptiness checks
rg -A 3 "atype" --type python

# Also look for the specific class/function containing this code
ast-grep --pattern $'def $_(self, $_):
    $$$
    collected_elements = set()
    for sys_stat in lst:
        if "atype" in sys_stat:
            collected_elements.update($$$)
    $$$'

Length of output: 248


Script:

#!/bin/bash
# Search for patterns related to 'atype' handling and array emptiness checks
rg -A 3 "atype" -t py

# Look for similar array handling patterns in the codebase
rg -t py "numpy\.unique|\.update.*numpy" -A 2

# Find the specific file we're analyzing
fd "stat.py" --type f

Length of output: 89317


85-90: Consider using logging and verifying that all datasets are included.
You are only collecting the set of elements from the first dataset and simply printing them. If your intent is to gather possible elements across all datasets, you may want to iterate over all datasets. Also, using "log.info" would be more consistent than a raw "print" in a library setting.

Possible fix for the print statement:

-        print('we want', all_elements)
+        log.info(f"We want elements: {all_elements}")

97-109: Ensure partial coverage logic for missing elements is intended.
Here, frames are appended until the number of records reaches 'nbatches'. Verify that the short-circuiting with “break” actually meets your coverage needs for missing elements. If your goal is to gather as many frames as possible across all missing elements, you might need a more explicit limit or a different approach.

✅ Verification successful

Let me gather more context about this code to better understand the coverage logic for missing elements.


Let me search for more context about the initialization and usage of nbatches to better understand the coverage requirements.


Let me search for the initialization of nbatches to understand its purpose in the coverage logic.


Let me search for more context about how nbatches is used and its relationship with the dataset statistics.


Based on the gathered context, I can now provide a final response about the coverage logic for missing elements.

The current partial coverage logic is intentional and correct.

The code's behavior is appropriate because:

  1. nbatches is a parameter that defines the desired number of batches for collecting statistics, used consistently throughout the make_stat_input function
  2. The break condition if len(lst[i]['atype']) >= nbatches ensures each system collects up to the specified number of batches, preventing over-sampling
  3. This is consistent with how regular batches are collected earlier in the function where numb_batches = min(nbatches, len(dataloaders[i])) is used
  4. The goal is to gather a statistically significant sample (controlled by nbatches) rather than exhaustively processing all frames containing missing elements

The current implementation correctly balances between gathering sufficient data for statistics while maintaining consistent batch sizes across all elements.

🏁 Scripts executed

The following scripts were executed for the analysis:

Error: No shell scripts found


Script:

#!/bin/bash
# Let's first look at the broader context of this code
rg -B 10 -A 5 "for missing_element in missing_elements" deepmd/pt/utils/stat.py

# Also search for any related tests that might help understand the intended behavior
fd "test.*stat.*py" -x rg -l "missing_element"

# Look for the initialization of nbatches and lst variables
rg -B 5 "nbatches.*=|lst.*=" deepmd/pt/utils/stat.py

Length of output: 1724


Script:

#!/bin/bash
# Search for the function definition and its parameters
ast-grep --pattern 'def $FUNC($PARAMS) {
  $$$
  nbatches
  $$$
}'  deepmd/pt/utils/stat.py

# Look for any documentation or comments about nbatches
rg -B 3 -A 3 "nbatches" deepmd/pt/utils/stat.py

# Check if there are any tests that verify this behavior
fd "test.*stat.*py" -x cat {} 

Length of output: 66294


Script:

#!/bin/bash
# Look for the function definition and documentation
rg -B 10 "def make_stat_input" deepmd/pt/utils/stat.py

# Search for any tests that verify the behavior with missing elements
rg -B 5 -A 5 "missing_element" deepmd/pt/utils/stat.py

Length of output: 1079


Script:

#!/bin/bash
# Look for the full function implementation and its docstring
rg -B 20 -A 50 "def make_stat_input" deepmd/pt/utils/stat.py

# Search for any tests that verify the statistics collection
fd "test.*stat.*py" -x rg -A 10 "make_stat_input"

# Look for the initialization of lst and how frames are collected
rg -B 5 "lst.*=.*\[\]" deepmd/pt/utils/stat.py

Length of output: 4539

Comment on lines 43 to 54
def _build_element_to_frames(self):
"""Mapping element types to frame indexes"""
element_to_frames = {element: [] for element in range(self._ntypes)}
for frame_idx in range(len(self)):
frame_data = self._data_system.get_item_torch(frame_idx)

elements = frame_data["atype"]
for element in set(elements):
if len(element_to_frames[element]) < 10:
element_to_frames[element].append(frame_idx)
return element_to_frames

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⚠️ Potential issue

Fix indentation error and consider making the max frame limit configurable.
Static analysis flags a SyntaxError likely due to insufficient indentation after defining the method. Ensure this block is indented so that Python recognizes it as part of the method. Also, the hard-coded limit of 10 frames per element may need to be a configurable parameter if you expect variation in your datasets.

Example indentation fix:

-        def _build_element_to_frames(self):
-        """Mapping element types to frame indexes"""
-        element_to_frames = {element: [] for element in range(self._ntypes)} 
+    def _build_element_to_frames(self):
+        """Mapping element types to frame indexes"""
+        element_to_frames = {element: [] for element in range(self._ntypes)}

Committable suggestion skipped: line range outside the PR's diff.

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🪛 Ruff (0.8.2)

44-44: SyntaxError: Expected an indented block after function definition

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Actionable comments posted: 1

🧹 Nitpick comments (2)
deepmd/pt/utils/stat.py (2)

89-89: Remove debug print statement.

The print statement print("we want", all_elements) appears to be debug code that should be removed or replaced with proper logging.

-        print("we want", all_elements)
+        log.debug(f"Required elements for statistics: {all_elements}")

97-111: Optimize nested loops and add error handling.

The nested loops for handling missing elements could be optimized, and error handling should be added for invalid frame indices.

         for missing_element in missing_elements:
             for i, dataset in enumerate(datasets):
                 if hasattr(dataset, "element_to_frames"):
-                    frame_indices = dataset.element_to_frames.get(
-                        missing_element, []
-                    )
+                    try:
+                        frame_indices = dataset.element_to_frames.get(missing_element, [])
+                        if not frame_indices:
+                            continue
+                            
+                        # Pre-check if we need more frames
+                        if len(lst[i]["atype"]) >= nbatches:
+                            break
+                            
+                        # Process frames in batch
+                        for frame_idx in frame_indices:
+                            frame_data = dataset[frame_idx]
+                            if any(key not in lst[i] for key in frame_data):
+                                lst[i].update({key: [] for key in frame_data if key not in lst[i]})
+                            for key in frame_data:
+                                lst[i][key].append(frame_data[key])
+                            if len(lst[i]["atype"]) >= nbatches:
+                                break
+                    except Exception as e:
+                        log.warning(f"Error processing frames for element {missing_element}: {e}")
+                        continue
-                    for frame_idx in frame_indices:
-                        if len(lst[i]["atype"]) >= nbatches:
-                            break
-                        frame_data = dataset[frame_idx]
-                        for key in frame_data:
-                            if key not in lst[i]:
-                                lst[i][key] = []
-                            lst[i][key].append(frame_data[key])
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📥 Commits

Reviewing files that changed from the base of the PR and between 32da243 and adf2315.

📒 Files selected for processing (2)
  • deepmd/pt/utils/dataset.py (1 hunks)
  • deepmd/pt/utils/stat.py (1 hunks)
🧰 Additional context used
🪛 Ruff (0.8.2)
deepmd/pt/utils/dataset.py

44-44: SyntaxError: Expected an indented block after function definition

🔇 Additional comments (2)
deepmd/pt/utils/dataset.py (2)

43-44: ⚠️ Potential issue

Fix the indentation error in method definition.

The method definition has incorrect indentation which will cause a SyntaxError. It should be aligned with other class methods.

-        def _build_element_to_frames(self):
-        """Mapping element types to frame indexes"""
+    def _build_element_to_frames(self):
+        """Mapping element types to frame indexes"""

Likely invalid or redundant comment.

🧰 Tools
🪛 Ruff (0.8.2)

44-44: SyntaxError: Expected an indented block after function definition


43-53: 🛠️ Refactor suggestion

Make frame limit configurable and enhance documentation.

  1. The hard-coded limit of 10 frames per element should be configurable.
  2. The docstring should be more descriptive about the method's purpose and return value.
-    def _build_element_to_frames(self):
-        """Mapping element types to frame indexes"""
+    def _build_element_to_frames(self, max_frames_per_element: int = 10) -> dict[int, list[int]]:
+        """Build a mapping of element types to their corresponding frame indices.
+        
+        Args:
+            max_frames_per_element: Maximum number of frames to store per element type.
+            
+        Returns:
+            A dictionary mapping element types (int) to lists of frame indices (list[int])
+            where each element type appears.
+        """
         element_to_frames = {element: [] for element in range(self._ntypes)}
         for frame_idx in range(len(self)):
             frame_data = self._data_system.get_item_torch(frame_idx)
 
             elements = frame_data["atype"]
             for element in set(elements):
-                if len(element_to_frames[element]) < 10:
+                if len(element_to_frames[element]) < max_frames_per_element:
                     element_to_frames[element].append(frame_idx)
         return element_to_frames

Likely invalid or redundant comment.

🧰 Tools
🪛 Ruff (0.8.2)

44-44: SyntaxError: Expected an indented block after function definition

Comment on lines 85 to 118

all_elements = set()
if datasets and hasattr(datasets[0], "element_to_frames"):
all_elements.update(datasets[0].element_to_frames.keys())
print("we want", all_elements)

collected_elements = set()
for sys_stat in lst:
if "atype" in sys_stat:
collected_elements.update(np.unique(sys_stat["atype"].cpu().numpy()))
missing_elements = all_elements - collected_elements

for missing_element in missing_elements:
for i, dataset in enumerate(datasets):
if hasattr(dataset, "element_to_frames"):
frame_indices = dataset.element_to_frames.get(
missing_element, []
)
for frame_idx in frame_indices:
if len(lst[i]["atype"]) >= nbatches:
break
frame_data = dataset[frame_idx]
for key in frame_data:
if key not in lst[i]:
lst[i][key] = []
lst[i][key].append(frame_data[key])

collected_elements = set()
for sys_stat in lst:
if "atype" in sys_stat:
collected_elements.update(
np.unique(sys_stat["atype"].cpu().numpy())
)

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💡 Codebase verification

Based on the code analysis, I can now provide a final response:

Add validation check for missing elements after collection

After the final collection of elements, add a validation check to ensure all required elements were found:

# After the final collected_elements update
if all_elements - collected_elements:
    missing = all_elements - collected_elements
    warnings.warn(f"Could not find frames containing elements: {missing}")
  • Add this check at line 118 in deepmd/pt/utils/stat.py after the final collection loop
  • Import warnings module at the top of the file
🔗 Analysis chain

Consider adding validation for collected elements.

After collecting elements, it would be good to verify that all required elements were found and log a warning if any are still missing.


Let me analyze the code further to understand the element collection and validation context.

🏁 Scripts executed

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Script:

#!/bin/bash
# Description: Check if there are any elements that might be consistently missing across datasets

# Search for element type definitions and usages
rg -A 5 "atype|element_to_frames"

Length of output: 84908


Script:

#!/bin/bash
# Search for element validation or error handling related to missing elements
rg -A 5 "missing_elements|element_to_frames|all_elements"

Length of output: 2630

@@ -40,6 +40,18 @@
b_data["natoms"] = self._natoms_vec
return b_data

def _build_element_to_frames(self):

Check warning

Code scanning / CodeQL

Unreachable code Warning

This statement is unreachable.
collected_elements.update(
np.unique(sys_stat["atype"].cpu().numpy())
)

Check notice

Code scanning / CodeQL

Nested loops with same variable Note

Nested for statement uses loop variable 'sys_stat' of enclosing
for statement
.
@iProzd iProzd marked this pull request as draft December 24, 2024 14:37
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Actionable comments posted: 4

🧹 Nitpick comments (4)
source/tests/pt/test_make_stat_input.py (4)

14-23: Consider using collections.defaultdict for element_to_frames.
You can simplify the nested checks for element presence in the dictionary by using a defaultdict(list), which would eliminate the need for the explicit if atype not in self.element_to_frames: condition.

-from collections import defaultdict

class TestDataset:
    def __init__(self, samples):
        self.samples = samples
-        self.element_to_frames = {}
+        from collections import defaultdict
+        self.element_to_frames = defaultdict(list)
        for idx, sample in enumerate(samples):
            atypes = sample["atype"]
            for atype in atypes:
-                if atype not in self.element_to_frames:
-                    self.element_to_frames[atype] = []
                self.element_to_frames[atype].append(idx)

25-28: Rename the property to better reflect usage.
Using @property but naming it get_all_atype can be confusing. Consider a more descriptive name like all_atypes, since Python properties typically avoid "get_" prefixes.


53-59: Remove or use the assigned lst variable.
The variable lst is assigned but never used, according to static analysis hints. Consider removing it or using it for additional assertions.

 def test_make_stat_input(self):
     nbatches = 1
-    lst = make_stat_input(self.datasets, self.dataloaders, nbatches=nbatches)
+    _ = make_stat_input(self.datasets, self.dataloaders, nbatches=nbatches)
     all_elements = self.system.get_all_atype
     unique_elements = {1, 2}
     self.assertEqual(unique_elements, all_elements, "make_stat_input miss elements")
🧰 Tools
🪛 Ruff (0.8.2)

55-55: Local variable lst is assigned to but never used

Remove assignment to unused variable lst

(F841)


61-62: Optional test runner inclusion.
Having the if __name__ == "__main__": unittest.main() block is fine. You could remove it if tests are run by a dedicated test runner.

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📥 Commits

Reviewing files that changed from the base of the PR and between adf2315 and dc64307.

📒 Files selected for processing (3)
  • deepmd/pt/utils/dataset.py (4 hunks)
  • deepmd/pt/utils/stat.py (1 hunks)
  • source/tests/pt/test_make_stat_input.py (1 hunks)
🧰 Additional context used
🪛 Ruff (0.8.2)
source/tests/pt/test_make_stat_input.py

55-55: Local variable lst is assigned to but never used

Remove assignment to unused variable lst

(F841)

🔇 Additional comments (4)
source/tests/pt/test_make_stat_input.py (1)

40-52: Test setup looks good.
The dataset creation for testing is straightforward and clear. No issues found.

deepmd/pt/utils/dataset.py (2)

21-24: Docstring clarity is sufficient.
The docstring effectively describes constructor parameters. No corrections needed.


34-34: Initialization of element frames is a good approach.
Storing the result of _build_element_to_frames() in self.element_to_frames and self.get_all_atype reduces redundancy.

deepmd/pt/utils/stat.py (1)

86-94: No immediate issues with collection of atomic types.
Collecting and updating sets is correct.

Comment on lines +45 to +60
def _build_element_to_frames(self):
"""Build mapping from element types to frame indexes and return all unique element types."""
element_to_frames = {element: [] for element in range(self._ntypes)}
all_elements = set()
all_frame_data = self._data_system.get_batch(self._data_system.nframes)
all_elements = np.unique(all_frame_data["type"])
for i in range(len(self)):
for element in all_elements:
element_to_frames[element].append(i)
return element_to_frames, all_elements

def get_frames_for_element(self, missing_element_name):
"""Get the frames that contain the specified element type."""
element_index = self._type_map.index(missing_element_name)
return self.element_to_frames.get(element_index, [])

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💡 Codebase verification

Based on the code analysis, I can now provide a final response about the memory usage concern:

Consider using get_item_torch() instead of get_batch() for building element_to_frames mapping

The current implementation loads all frames at once using get_batch(self._data_system.nframes) which can consume significant memory for large datasets. A more memory-efficient approach would be to iterate through frames using get_item_torch(), which is already implemented in the class for single frame access.

  • In _build_element_to_frames(), replace the batch loading with frame-by-frame processing:
all_elements = set()
for i in range(len(self)):
    frame_data = self._data_system.get_item_torch(i)
    frame_elements = np.unique(frame_data["type"])
    all_elements.update(frame_elements)
🔗 Analysis chain

Validate potential large memory usage when calling get_batch(nframes).
Calling self._data_system.get_batch(self._data_system.nframes) may consume significant memory in large datasets. Consider chunking or a more incremental approach if data size is large.


Let me search for more specific information about the data system implementation.


Let me check the implementation of the data system class to understand how the data is loaded and managed.


Let me check the implementation of the data system's get_batch method.


Let me check how the data is loaded and managed in the DeepmdData class since it's the underlying implementation used by DeepmdDataSystem.


Let me check the implementation of the _build_element_to_frames method and its usage.

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Script:

#!/bin/bash
# Description: Identify large dataset usage in codebase
# We will search for all calls to get_batch() to see if partial batch retrieval is possible.
rg -A 3 $'get_batch\\('

Length of output: 15959


Script:

#!/bin/bash
# Let's look at the data system implementation to understand the batch retrieval mechanism
ast-grep --pattern 'class DeepmdDataSystem {
  $$$
  get_batch($$$) {
    $$$
  }
  $$$
}'

# Also check if there are any chunking mechanisms already in place
rg -A 5 "chunk" 

Length of output: 2368


Script:

#!/bin/bash
# Check the implementation of DeepmdDataSystem class
rg -A 10 "class DeepmdDataSystem"

# Also check how nframes is defined/used
rg -A 3 "nframes"

Length of output: 83091


Script:

#!/bin/bash
# Look for the implementation of get_batch in DeepmdDataSystem
rg -A 15 "def get_batch" deepmd/utils/data_system.py

# Also check if there are any batch size related configurations
rg -A 3 "batch_size" deepmd/utils/data_system.py

Length of output: 6071


Script:

#!/bin/bash
# Check the implementation of DeepmdData class
rg -A 10 "class DeepmdData" deepmd/utils/data.py

# Also check how data is loaded and managed
rg -A 10 "def get_batch" deepmd/utils/data.py

Length of output: 744


Script:

#!/bin/bash
# Look for the implementation of _build_element_to_frames
rg -A 10 "_build_element_to_frames" deepmd/pt/utils/dataset.py

# Check where this method is used
rg -B 5 "_build_element_to_frames" deepmd/pt/utils/dataset.py

Length of output: 1675

Comment on lines +104 to +128
for dd in frame_data:
if dd == "type":
continue
if frame_data[dd] is None:
sys_stat_new[dd] = None
elif isinstance(frame_data[dd], np.ndarray):
if dd not in sys_stat_new:
sys_stat_new[dd] = []
frame_data[dd] = torch.from_numpy(frame_data[dd])
frame_data[dd] = frame_data[dd].unsqueeze(0)
sys_stat_new[dd].append(frame_data[dd])
elif isinstance(stat_data[dd], np.float32):
sys_stat_new[dd] = frame_data[dd]
else:
pass
for key in sys_stat_new:
if isinstance(sys_stat_new[key], np.float32):
pass
elif sys_stat_new[key] is None or sys_stat_new[key][0] is None:
sys_stat_new[key] = None
elif isinstance(stat_data[dd], torch.Tensor):
sys_stat_new[key] = torch.cat(sys_stat_new[key], dim=0)
dict_to_device(sys_stat_new)
lst.append(sys_stat_new)

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⚠️ Potential issue

stat_data[dd] usage appears out of scope.
Inside this block, stat_data is not defined, which could raise a NameError. Ensure the intended variable is accessible in this scope or replace it with the correct reference.

missing_element = all_element - collect_elements
for miss in missing_element:
for i in datasets:
if i.element_to_frames.get(miss, []) is not None:
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🛠️ Refactor suggestion

Check for dictionary key presence vs. None.
dict.get(key, []) will never be None unless explicitly set as the default. This current check if i.element_to_frames.get(miss, []) is not None: is redundant.

-if i.element_to_frames.get(miss, []) is not None:
+if miss in i.element_to_frames:
📝 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.

Suggested change
if i.element_to_frames.get(miss, []) is not None:
if miss in i.element_to_frames:

Comment on lines +95 to +103
for miss in missing_element:
for i in datasets:
if i.element_to_frames.get(miss, []) is not None:
frame_indices = i.element_to_frames.get(miss, [])
frame_data = i.__getitem__(frame_indices[0])
break
else:
pass
sys_stat_new = {}
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⚠️ Potential issue

Potential index out-of-range error.
If frame_indices is empty, calling frame_data = i.__getitem__(frame_indices[0]) at line 99 will raise an error. Consider a safe check for an empty list before accessing [0].

 for miss in missing_element:
     for i in datasets:
         if i.element_to_frames.get(miss, []) is not None:
             frame_indices = i.element_to_frames.get(miss, [])
-            frame_data = i.__getitem__(frame_indices[0])
+            if frame_indices:
+                frame_data = i.__getitem__(frame_indices[0])
+            else:
+                continue
             break
         else:
             pass
📝 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.

Suggested change
for miss in missing_element:
for i in datasets:
if i.element_to_frames.get(miss, []) is not None:
frame_indices = i.element_to_frames.get(miss, [])
frame_data = i.__getitem__(frame_indices[0])
break
else:
pass
sys_stat_new = {}
for miss in missing_element:
for i in datasets:
if i.element_to_frames.get(miss, []) is not None:
frame_indices = i.element_to_frames.get(miss, [])
if frame_indices:
frame_data = i.__getitem__(frame_indices[0])
else:
continue
break
else:
pass
sys_stat_new = {}

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