import os
import pandas as pdc
from openpyxl import load_workbook

input_folder = r"d:\input"

merged_dfs = []
total_rows = 0

excel_files = [f for f in os.listdir(input_folder) if f.endswith(".xlsx")]

for excel_file in sorted(excel_files):    
    try:
        wb = load_workbook(excel_file, data_only=False)
        sheet_name = wb.sheetnames[0]  # Get first sheet name
        df = pdc.read_excel(excel_file, sheet_name=sheet_name)
        merged_dfs.append(df)
        total_rows += len(df)
    except Exception as e:
        print(f"Error processing {excel_file}: " + str(e))
        continue

if merged_dfs:
    merged_output = pd.concat(merged_dfs, ignore_index=True)
    output_file = r"d:\output\merged_file.xlsx"
    merged_output.to_excel(output_file, index=False)
    print(f"Successfully saved {total_rows} rows to output file")