import pandas as pd
import numpy as np
 
a=np.array([[1,2,3],[4,5,6],[7,8,9]])
df1=pd.DataFrame(a,index=['row0','row1','row2'],columns=list('ABC'))
print(df1)
df2=df1.copy()
 
#删除/选取某列含有特定数值的行
#df1=df1[df1['A'].isin([1])]
#df1[df1['A'].isin([1])]  选取df1中A列包含数字1的行
 
df1=df1[~df1['A'].isin([1])]
#通过~取反，选取不包含数字1的行
print(df1)