fix: resolve lint issues and test failures

- Remove unused imports from check_deps.py, flow_visualizer.py, and test files
- Add noqa comments for intentional imports in check_deps.py
- Fix PDF test to properly create temporary test file and handle missing dependencies
- Address all lint F401 errors identified in CI

Co-Authored-By: João <joao@crewai.com>

check_deps.py

@@ -3,37 +3,37 @@
 print("Checking optional dependencies availability:")
 
 try:
-    import chromadb
+    import chromadb  # noqa: F401
     print('chromadb: AVAILABLE')
 except ImportError:
     print('chromadb: NOT AVAILABLE')
 
 try:
-    import pdfplumber
+    import pdfplumber  # noqa: F401
     print('pdfplumber: AVAILABLE')
 except ImportError:
     print('pdfplumber: NOT AVAILABLE')
 
 try:
-    import pyvis
+    import pyvis  # noqa: F401
     print('pyvis: AVAILABLE')
 except ImportError:
     print('pyvis: NOT AVAILABLE')
 
 try:
-    import opentelemetry
+    import opentelemetry  # noqa: F401
     print('opentelemetry: AVAILABLE')
 except ImportError:
     print('opentelemetry: NOT AVAILABLE')
 
 try:
-    import auth0
+    import auth0  # noqa: F401
     print('auth0: AVAILABLE')
 except ImportError:
     print('auth0: NOT AVAILABLE')
 
 try:
-    import aisuite
+    import aisuite  # noqa: F401
     print('aisuite: AVAILABLE')
 except ImportError:
     print('aisuite: NOT AVAILABLE')

src/crewai/flow/flow_visualizer.py

@@ -1,7 +1,6 @@
 # flow_visualizer.py
 
 import os
-from pathlib import Path
 
 try:
     from pyvis.network import Network
@@ -13,7 +12,7 @@ except ImportError:
 from crewai.flow.config import COLORS, NODE_STYLES
 from crewai.flow.html_template_handler import HTMLTemplateHandler
 from crewai.flow.legend_generator import generate_legend_items_html, get_legend_items
-from crewai.flow.path_utils import safe_path_join, validate_path_exists
+from crewai.flow.path_utils import safe_path_join
 from crewai.flow.utils import calculate_node_levels
 from crewai.flow.visualization_utils import (
     add_edges,

tests/test_lite_installation.py

@@ -1,10 +1,6 @@
 """Test that crewAI lite installation works with minimal dependencies."""
 
 import pytest
-import subprocess
-import sys
-import tempfile
-import os
 from pathlib import Path
 from unittest.mock import patch, Mock
 

tests/test_optional_dependencies.py

@@ -2,7 +2,6 @@
 
 import pytest
 from unittest.mock import patch, Mock
-import sys
 
 
 class TestOptionalDependencies:
@@ -35,15 +34,28 @@ class TestOptionalDependencies:
     def test_pdfplumber_import_error(self):
         """Test that PDF knowledge source raises helpful error without pdfplumber."""
         with patch.dict('sys.modules', {'pdfplumber': None}):
-            from crewai.knowledge.source.pdf_knowledge_source import PDFKnowledgeSource
-            
-            pdf_source = PDFKnowledgeSource(file_paths=["test.pdf"])
-            
-            with pytest.raises(ImportError) as exc_info:
-                pdf_source._import_pdfplumber()
-            
-            assert "pdfplumber is required" in str(exc_info.value)
-            assert "crewai[knowledge]" in str(exc_info.value)
+            with patch('crewai.knowledge.source.pdf_knowledge_source.PDFPLUMBER_AVAILABLE', False):
+                from crewai.knowledge.source.pdf_knowledge_source import PDFKnowledgeSource
+                
+                from pathlib import Path
+                knowledge_dir = Path("knowledge")
+                knowledge_dir.mkdir(exist_ok=True)
+                test_file = knowledge_dir / "test.pdf"
+                test_file.touch()
+                
+                try:
+                    pdf_source = PDFKnowledgeSource(file_paths=["test.pdf"])
+                    
+                    with pytest.raises(ImportError) as exc_info:
+                        pdf_source._import_pdfplumber()
+                    
+                    assert "pdfplumber is required" in str(exc_info.value)
+                    assert "crewai[knowledge]" in str(exc_info.value)
+                finally:
+                    if test_file.exists():
+                        test_file.unlink()
+                    if knowledge_dir.exists() and not any(knowledge_dir.iterdir()):
+                        knowledge_dir.rmdir()
 
     def test_pyvis_import_error(self):
         """Test that flow visualization raises helpful error without pyvis."""