chore: speed up "mineru --help"

mineru/cli/client.py

@@ -7,7 +7,6 @@ from loguru import logger
 from mineru.utils.config_reader import get_device
 from mineru.utils.model_utils import get_vram
 from ..version import __version__
-from .common import do_parse, read_fn, pdf_suffixes, image_suffixes
 
 
 @click.command()
@@ -139,6 +138,8 @@ from .common import do_parse, read_fn, pdf_suffixes, image_suffixes
 
 def main(input_path, output_dir, method, backend, lang, server_url, start_page_id, end_page_id, formula_enable, table_enable, device_mode, virtual_vram, model_source):
 
+    from .common import do_parse, read_fn, pdf_suffixes, image_suffixes
+
     def get_device_mode() -> str:
         if device_mode is not None:
             return device_mode

mineru/utils/config_reader.py

@@ -2,7 +2,6 @@
 import json
 import os
 
-import torch
 from loguru import logger
 
 # 定义配置文件名常量
@@ -72,6 +71,8 @@ def get_device():
     if device_mode is not None:
         return device_mode
     else:
+        import torch
+
         if torch.cuda.is_available():
             return "cuda"
         elif torch.backends.mps.is_available():

mineru/utils/model_utils.py

 import time
-import torch
 import gc
 from PIL import Image
 from loguru import logger
@@ -298,6 +297,8 @@ def get_res_list_from_layout_res(layout_res, iou_threshold=0.7, overlap_threshol
 
 
 def clean_memory(device='cuda'):
+    import torch
+
     if device == 'cuda':
         if torch.cuda.is_available():
             torch.cuda.empty_cache()
@@ -321,6 +322,8 @@ def clean_vram(device, vram_threshold=8):
 
 
 def get_vram(device):
+    import torch
+
     if torch.cuda.is_available() and str(device).startswith("cuda"):
         total_memory = torch.cuda.get_device_properties(device).total_memory / (1024 ** 3)  # 将字节转换为 GB
         return total_memory