Python使用pd.mean()函数后出现Warning，请问该如何解决？

import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
df = pd.read_excel(r'成绩表.xlsx')
plt.rcParams['font.sans-serif']=['SimHei']                     # 解决中文乱码
labels = np.array(['语文','数学','英语','物理','化学','生物'])      # 标签
dataLenth = 6       # 数据长度
# 计算女生、男生各科平均成绩
df1 = df[df['性别']=='女'].mean().round(2)
df2 = df[df['性别']=='男'].mean().round(2)
print(df1-df2)

warning信息：

D:/06.Differential analysis.py:9: FutureWarning: Dropping of nuisance columns in DataFrame reductions (with 'numeric_only=None') is deprecated; in a future version this will raise TypeError.  Select only valid columns before calling the reduction.
  df1 = df[df['性别']=='女'].mean().round(2)
D:/06.Differential analysis.py:10: FutureWarning: Dropping of nuisance columns in DataFrame reductions (with 'numeric_only=None') is deprecated; in a future version this will raise TypeError.  Select only valid columns before calling the reduction.
  df2 = df[df['性别']=='男'].mean().round(2)  

看你取到的df数据是不是含有其他非数值的列，或者你索引的时候就只取各科目列就行，warning只要不报错也没关系