fix some lint

Author: Zongwei9888

deepcode.py

@@ -14,38 +14,35 @@
 
 def check_dependencies():
     """Check if necessary dependencies are installed"""
+    import importlib.util
+    
     print("🔍 Checking dependencies...")
 
     missing_deps = []
     missing_system_deps = []
 
-    try:
-        import streamlit
-
+    # Check Streamlit availability
+    if importlib.util.find_spec("streamlit") is not None:
         print("✅ Streamlit is installed")
-    except ImportError:
+    else:
         missing_deps.append("streamlit>=1.28.0")
 
-    try:
-        import yaml
-
+    # Check PyYAML availability
+    if importlib.util.find_spec("yaml") is not None:
         print("✅ PyYAML is installed")
-    except ImportError:
+    else:
         missing_deps.append("pyyaml")
 
-    try:
-        import asyncio
-
+    # Check asyncio availability
+    if importlib.util.find_spec("asyncio") is not None:
         print("✅ Asyncio is available")
-    except ImportError:
+    else:
         missing_deps.append("asyncio")
 
     # Check PDF conversion dependencies
-    try:
-        import reportlab
-
+    if importlib.util.find_spec("reportlab") is not None:
         print("✅ ReportLab is installed (for text-to-PDF conversion)")
-    except ImportError:
+    else:
         missing_deps.append("reportlab")
         print("⚠️  ReportLab not found (text files won't convert to PDF)")
 

tools/git_command.py

@@ -126,7 +126,7 @@ async def check_git_installed() -> bool:
         )
         await proc.wait()
         return proc.returncode == 0
-    except:
+    except Exception:
         return False
 
 

tools/pdf_converter.py

@@ -556,12 +556,9 @@ def check_dependencies(self) -> dict:
                 pass
 
         # Check ReportLab
-        try:
-            import reportlab
-
+        import importlib.util
+        if importlib.util.find_spec("reportlab") is not None:
             results["reportlab"] = True
-        except ImportError:
-            pass
 
         return results
 

tools/pdf_downloader.py

@@ -753,7 +753,7 @@ async def check_url_accessible(url: str) -> Dict[str, Any]:
                     "content_type": response.headers.get("Content-Type", ""),
                     "content_length": response.headers.get("Content-Length", 0),
                 }
-    except:
+    except Exception:
         return {
             "accessible": False,
             "status": 0,
@@ -775,7 +775,6 @@ async def download_file(url: str, destination: str) -> Dict[str, Any]:
                 response.raise_for_status()
 
                 # 获取文件信息
-                total_size = int(response.headers.get("Content-Length", 0))
                 content_type = response.headers.get(
                     "Content-Type", "application/octet-stream"
                 )
@@ -1264,7 +1263,7 @@ async def convert_document_to_markdown(
     try:
         parsed = urlparse(file_path)
         is_url_input = parsed.scheme in ("http", "https")
-    except:
+    except Exception:
         is_url_input = False
 
     # 检查文件是否存在（如果不是URL）