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Data loading for CCFM.
Imports scDFM Data/PerturbationDataset by temporarily swapping sys.modules
so that scDFM's 'src.*' packages are visible during import.
"""
import sys
import os
import types
_SCDFM_ROOT = os.path.normpath(
os.path.join(os.path.dirname(__file__), "..", "..", "..", "scDFM")
)
# Cache to avoid repeated imports
_cached_classes = {}
def get_data_classes():
"""Lazily import scDFM data classes with proper module isolation."""
if _cached_classes:
return (
_cached_classes["Data"],
_cached_classes["PerturbationDataset"],
_cached_classes["TrainSampler"],
_cached_classes["TestDataset"],
)
# Save CCFM's src modules
saved = {}
for key in list(sys.modules.keys()):
if key == "src" or key.startswith("src."):
saved[key] = sys.modules.pop(key)
# Ensure __init__.py exists for scDFM data_process
for d in ["src", "src/data_process", "src/utils", "src/tokenizer"]:
init_path = os.path.join(_SCDFM_ROOT, d, "__init__.py")
if not os.path.exists(init_path):
os.makedirs(os.path.dirname(init_path), exist_ok=True)
with open(init_path, "w") as f:
f.write("# Auto-created by CCFM\n")
sys.path.insert(0, _SCDFM_ROOT)
try:
from src.data_process.data import Data, PerturbationDataset, TrainSampler, TestDataset
_cached_classes["Data"] = Data
_cached_classes["PerturbationDataset"] = PerturbationDataset
_cached_classes["TrainSampler"] = TrainSampler
_cached_classes["TestDataset"] = TestDataset
finally:
# Remove scDFM's src.* entries
for key in list(sys.modules.keys()):
if (key == "src" or key.startswith("src.")) and not key.startswith("scdfm_"):
del sys.modules[key]
# Restore CCFM's src modules
for key, mod in saved.items():
sys.modules[key] = mod
if _SCDFM_ROOT in sys.path:
sys.path.remove(_SCDFM_ROOT)
return Data, PerturbationDataset, TrainSampler, TestDataset
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