how to merge multiple excel files into a single files with python code example

Example: how to combine number of excel files into a single file using python or pandas

import os
import pandas as pd
cwd = os.path.abspath('') 
files = os.listdir(cwd)  
df = pd.DataFrame()
for file in files:
    if file.endswith('.xlsx'):
        df = df.append(pd.read_excel(file), ignore_index=True) 
df.head() 
df.to_excel('total_sales.xlsx')