updated load_content() function in excel_knowledge_source.py to reduce memory usage and provide better documentation

src/crewai/knowledge/source/excel_knowledge_source.py

@@ -7,6 +7,29 @@ from crewai.knowledge.source.base_file_knowledge_source import BaseFileKnowledge
 class ExcelKnowledgeSource(BaseFileKnowledgeSource):
     """A knowledge source that stores and queries Excel file content using embeddings."""
 
+    def load_content(self) -> Dict[Path, Dict[str, str]]:
+        """Load and preprocess Excel file content from multiple sheets.
+
+        Each sheet's content is converted to CSV format and stored.
+
+        Returns:
+            Dict[Path, Dict[str, str]]: A mapping of file paths to their respective sheet contents.
+
+        Raises:
+            ImportError: If required dependencies are missing.
+            FileNotFoundError: If the specified Excel file cannot be opened.
+        """
+        pd = self._import_dependencies()
+        content_dict = {}
+        for file_path in self.safe_file_paths:
+            with pd.ExcelFile(file_path) as xl:
+                sheet_dict = {
+                    sheet_name: pd.read_excel(xl, sheet_name).to_csv(index=False)
+                    for sheet_name in xl.sheet_names
+                }
+            content_dict[file_path] = sheet_dict
+        return content_dict
+
     def load_content(self) -> Dict[Path, str]:
         """Load and preprocess Excel file content. Updated to account for .xlsx workbooks with multiple tabs/sheets"""
         pd, openpyxl, load_workbook = self._import_dependencies()
@@ -33,7 +56,6 @@ class ExcelKnowledgeSource(BaseFileKnowledgeSource):
                         sheet_str += str(cell) + ","
                     sheet_str += "\n"
 
-                print(sheet_str)
                 # Add the sheet content to the file sheet dictionary
                 sheet_dict[sheet_name] = sheet_str
             # Add the file sheet dictionary to the content dictionary
@@ -44,11 +66,11 @@ class ExcelKnowledgeSource(BaseFileKnowledgeSource):
     def _import_dependencies(self):
         """Dynamically import dependencies."""
         try:
-            import openpyxl  # noqa
-            from openpyxl import load_workbook
+            # import openpyxl  # noqa
+            # from openpyxl import load_workbook
             import pandas as pd
 
-            return pd, openpyxl, load_workbook
+            return pd
         except ImportError as e:
             missing_package = str(e).split()[-1]
             raise ImportError(