nwb_hash.py
get_file_namespaces(file_path)
¶
Get all namespace versions from an NWB file.
WARNING: This function falsely reports core <= 2.6.0 as 2.6.0-alpha
Parameters:
Name | Type | Description | Default |
---|---|---|---|
file_path
|
Union[str, Path]
|
Path to the NWB file. |
required |
Source code in src/spyglass/utils/nwb_hash.py
DirectoryHasher
¶
Source code in src/spyglass/utils/nwb_hash.py
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__init__(directory_path, batch_size=DEFAULT_BATCH_SIZE, keep_obj_hash=False, verbose=False)
¶
Generate a hash of the contents of a directory, recursively.
Searches though all files in the directory and subdirectories, hashing the contents of files. nwb files are hashed with the NwbfileHasher class. JSON files are hashed by encoding the contents, ignoring specific keys, like 'version'. All other files are hashed by reading the file in chunks.
If the contents of a json file is otherwise the same, but the 'version' value is different, we assume that the dependency change had no effect on the data and ignore the difference.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
directory_path
|
str
|
Path to the directory to hash. |
required |
batch_size
|
int
|
Limit of data to hash for large files, by default 4095. |
DEFAULT_BATCH_SIZE
|
keep_obj_hash
|
bool
|
Default false. If true, keep cache the hash of each file. |
False
|
verbose
|
bool
|
Display progress bar, by default False. |
False
|
Source code in src/spyglass/utils/nwb_hash.py
compute_hash()
¶
Hashes the contents of the directory, recursively.
Source code in src/spyglass/utils/nwb_hash.py
npy_encode(file_path)
¶
Encode the contents of a numpy file for hashing.
chunk_encode(file_path)
¶
Encode the contents of a file in chunks for hashing.
Source code in src/spyglass/utils/nwb_hash.py
json_encode(file_path)
¶
Encode the contents of a json file for hashing.
Ignores the predetermined keys in the IGNORED_KEYS list.
Source code in src/spyglass/utils/nwb_hash.py
pop_version(data)
¶
Recursively remove banned keys from any nested dicts/lists.
Source code in src/spyglass/utils/nwb_hash.py
NwbfileHasher
¶
Source code in src/spyglass/utils/nwb_hash.py
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__init__(path, batch_size=DEFAULT_BATCH_SIZE, precision_lookup=PRECISION_LOOKUP, keep_obj_hash=False, keep_file_open=False, verbose=False)
¶
Hashes the contents of an NWB file.
Iterates through all objects in the NWB file, hashing the names, attrs, and data of each object. Ignores NWB specifications, and only considers NWB version.
Uses a batch size to limit the amount of data hashed at once for large datasets. Rounds data to n decimal places for specific dataset names, as provided in the data_rounding dict.
Version numbers stored in '/general/source_script' are ignored.
Keeps each object hash as a dictionary, if keep_obj_hash is True. This is useful for debugging, but not recommended for large files.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
path
|
Union[str, Path]
|
Path to the NWB file. |
required |
batch_size
|
int
|
Limit of data to hash for large datasets, by default 4095. |
DEFAULT_BATCH_SIZE
|
precision_lookup
|
Dict[str, int]
|
Round data to n decimal places for specific datasets (i.e., {dataset_name: n}). Default is to round ProcessedElectricalSeries to 4 significant digits via np.round(chunk, n). An integer value will be applied to the ProcessedElectricalSeries dataset. |
PRECISION_LOOKUP
|
keep_obj_hash
|
bool
|
Keep the hash of each object in the NWB file, by default False. |
False
|
verbose
|
bool
|
Display progress bar, by default True. |
False
|
Source code in src/spyglass/utils/nwb_hash.py
collect_names(file)
¶
Collects all object names in the file.
Source code in src/spyglass/utils/nwb_hash.py
serialize_attr_value(value)
¶
Serializes an attribute value into bytes for hashing.
Setting all numpy array types to string avoids false positives.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
value
|
Any
|
Attribute value. |
required |
Returns:
Type | Description |
---|---|
bytes
|
Serialized bytes of the attribute value. |
Source code in src/spyglass/utils/nwb_hash.py
namespaces
cached
property
¶
Encoded string of all NWB namespace specs.
namespaces_str
cached
property
¶
String representation of all NWB namespace specs.
add_to_cache(name, obj, digest=None)
¶
Add object to the cache.
Centralizes conditional logic for adding objects to the cache.
compute_hash()
¶
Hashes the NWB file contents.