add Excel Data Component

src/backend/base/langflow/components/helpers/ParseExcelData.py

@@ -0,0 +1,75 @@
+from langflow.inputs import FileInput
+from langflow.custom import Component
+from langflow.inputs.inputs import StrInput
+from langflow.schema.data import Data
+from langflow.template.field.base import Output
+from openpyxl.utils.cell import coordinate_from_string
+import pandas as pd
+
+
+class ParseExcelDataComponent(Component):
+    display_name = "Excel Table"
+    description = "Load excel table as Data"
+    icon = "table"
+    name = "excel_table"
+
+    inputs = [
+        FileInput(
+            name="path",
+            display_name = "Path",
+            file_types = ["xlsx"]
+        ),
+        StrInput(
+            name = "cells",
+            display_name = "Cell Range",
+            required=True,
+            info="Enter the range in which the table lies. Example: A4:N28"
+
+        ),
+        StrInput(
+            name="sheet_name",
+            display_name="Sheet name",
+            advanced=True,
+
+        )
+    ]
+
+    outputs = [
+        Output(display_name="Data", name="data", method="load_excel"),
+    ]
+
+
+    def convert_range_string_to_read_excel_args(self, excel_range):
+        '''
+        Converts a range (i.e. something like 'A3:D20') and returns
+        the corresponding arguments to use in pd.read_excel.
+        '''
+        # Get cell addresses from range (i.e. A3 and D20)
+        upper_left, lower_right = excel_range.split(':')
+
+        # Convert cell address ('A3') to col (A) and row (3)
+        left_col, top_row = coordinate_from_string(upper_left)
+        right_col, bottom_row = coordinate_from_string(lower_right)
+
+        return {'usecols': f'{left_col}:{right_col}',
+                'skiprows': int(top_row) - 1,
+                'nrows': int(bottom_row) - int(top_row) + 1}
+
+
+
+    def load_excel(self) -> list[Data]:
+        if not self.path:
+            raise ValueError("Please, upload a file to use this component.")
+        sheet_name = self.sheet_name if self.sheet_name else None
+        resolved_path = self.resolve_path(self.path)
+        excel_range = self.cells
+        args = self.convert_range_string_to_read_excel_args(excel_range)
+        df = pd.read_excel(resolved_path,sheet_name,**args)
+        df_dict = df.to_dict(orient='records')
+        data_list = [Data(data=row) for row in df_dict]
+        self.status = data_list
+        return data_list
+
+
+
+

src/backend/base/langflow/components/helpers/__init__.py

@@ -22,6 +22,6 @@
     "MergeDataComponent",
     "ParseDataComponent",
     "SplitTextComponent",
-    "StoreMessageComponent"
+    "StoreMessageComponent",
     "ParseExcelDataComponent"
 ]