python合并表格sheets

import xlrd
import pandas as pd
from pandas import DataFrame

DATA_DIR = r"D:UsersFengZH2Desktopdata工作簿28.xlsx"
#excel_name = '%s2017.xls' % DATA_DIR
wb = xlrd.open_workbook(DATA_DIR)
#DATA_DIR = r'C:UsersAdministratorDesktop'
#excel_name = r'C:UsersAdministratorDesktop est.xlsx'
#wb = pd.read_excel(excel_name)
print(wb)

# 获取workbook中所有的表格
sheets = wb.sheet_names()
print(sheets)

# 循环遍历所有sheet
df_28 = DataFrame()
for i in range(len(sheets)):
# skiprows=2 忽略前两行
df = pd.read_excel(DATA_DIR, sheet_name=i, skiprows=0, index=False, encoding='utf8')
df_28 = df_28.append(df)
# 去除缺省值
#df_28 = df_28.dropna()
#df_28 = df_28.reset_index(drop=True)
print(df_28)

df_28.to_excel(r'D:UsersFengZH2Desktopdata est1.xlsx')