python使用pandas合并excel文件并去重复

话不多说，直接贴代码

import pandas as pd
import os
import time


# 去重复
def drop_duplicates(df):
    # 完全重复则删除
    df = df.drop_duplicates()
    return df

def merge_execl(merge_file_dir):
    # 要合并的execl目录
    dir_name = merge_file_dir
    dir_list = os.listdir(dir_name)
    timer = time.time()
    # df.drop_duplicates(subset, keep, inplace)
    new_data_col = ''
    new_data