Add splited 1m data.

data/BIOSCAN_1M/split_data/splitted_files/BioScan_data_in_splits.hdf5.part001

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+version https://git-lfs.github.com/spec/v1
+oid sha256:55cf45958e9bc139850b34702a66b73c4453e5f92f3aca0d5855b9bddb6c1590
+size 48318382080

data/BIOSCAN_1M/split_data/splitted_files/BioScan_data_in_splits.hdf5.part002

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+version https://git-lfs.github.com/spec/v1
+oid sha256:5216faff1790ab10251684ed1211e027345097c8e820eb38562cf3773edab026
+size 31381187161

merge_bioscan_5m.py

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+#!/usr/bin/env python3
+import os
+import glob
+
+def merge_files(parts_dir, output_file, base_filename):
+    pattern = os.path.join(parts_dir, f"{base_filename}.part*")
+    parts = sorted(glob.glob(pattern))
+    if not parts:
+        print("No files found")
+        return
+
+    print(f"found {len(parts)} files, merge to {output_file} ...")
+    with open(output_file, 'wb') as outfile:
+        for part in parts:
+            print(f"合并文件: {part} ...")
+            with open(part, 'rb') as infile:
+                while True:
+                    data = infile.read(1024 * 1024)
+                    if not data:
+                        break
+                    outfile.write(data)
+    print(f"Merged: {output_file}")
+
+if __name__ == '__main__':
+    parts_dir = "data/BIOSCAN_1M/split_data/splitted_files"
+    base_filename = "BioScan_data_in_splits.hdf5"
+    output_file = "data/BIOSCAN_1M/split_data/BioScan_data_in_splits_merged.hdf5"
+    merge_files(parts_dir, output_file, base_filename)

split_bioscan_5m.py

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+import os
+
+def split_file(input_file, output_dir, chunk_size):
+    if not os.path.exists(output_dir):
+        os.makedirs(output_dir)
+
+    file_size = os.path.getsize(input_file)
+    base_name = os.path.basename(input_file)
+    num_chunks = (file_size + chunk_size - 1) // chunk_size
+    print(f"Total size: {file_size} bytes, split to {num_chunks} files")
+
+    with open(input_file, 'rb') as f:
+        for i in range(num_chunks):
+            part_filename = os.path.join(output_dir, f"{base_name}.part{i + 1:03d}")
+            with open(part_filename, 'wb') as part_file:
+                bytes_written = 0
+                while bytes_written < chunk_size:
+                    buffer = f.read(min(1024 * 1024, chunk_size - bytes_written))
+                    if not buffer:
+                        break
+                    part_file.write(buffer)
+                    bytes_written += len(buffer)
+            print(f"Write to: {part_filename} Size: {bytes_written} bytes")
+
+
+if __name__ == '__main__':
+    input_file = "data/BIOSCAN_1M/split_data/BioScan_data_in_splits.hdf5"
+    output_dir = "data/BIOSCAN_1M/split_data/splitted_files"
+    chunk_size = 45 * (1024 ** 3)
+    split_file(input_file, output_dir, chunk_size)