import sys
from pathlib import Path
import importlib.util
import torchvision

# 检查是否有 functional_tensor 模块
if not hasattr(torchvision.transforms, 'functional_tensor'):
    # 创建一个虚拟模块
    module_name = 'torchvision.transforms.functional_tensor'
    spec = importlib.machinery.ModuleSpec(module_name, None)
    functional_tensor = importlib.util.module_from_spec(spec)
    
    # 将 functional 中的函数添加到 functional_tensor
    from torchvision.transforms import functional
    functional_tensor.rgb_to_grayscale = functional.rgb_to_grayscale
    
    # 将模块添加到 sys.modules
    sys.modules[module_name] = functional_tensor
    
    # 将模块添加到 torchvision.transforms
    torchvision.transforms.functional_tensor = functional_tensor

# 然后导入 basicsr
import basicsr