不多说，只留代码
import pandas as pd
import numpy as np
Page01=pd.read_excel("D:\\python_pandas\\sample\\demo16\\Students.xlsx",sheet_name="Page_001")
Page02=pd.read_excel("D:\\python_pandas\\sample\\demo16\\Students.xlsx",sheet_name="Page_002")


#合并
#ignore_index = True, index重新排序.
stu=Page01.append(Page02,ignore_index=True)
# print(stu)

#添加一列
stu["Age"]=25
# 有规律的值
stu["height"]=np.arange(0,len(stu.index))
# 重复的值
stu["Age1"]=np.repeat(50,len(stu.index))
#删除某列
stu.drop(columns=["height","Age1","Age","Score"],inplace=True)
#增加某列
stu.insert(loc=1,column="Score",value=np.repeat(90,len(stu.index)))
stu.at[2,"Name"] =np.nan
#删除空值的列，默认任何一个值为Nan丢弃行，subset指定扫描列，axis指定丢弃行还是列
stu.dropna(subset=["Score"],inplace=True)
stu.dropna(subset=["Name"],inplace=True)
print(stu)