Compare Python Pandas DataFrames for matching rows
问题 I have this DataFrame ( df1 ) in Pandas: df1 = pd.DataFrame(np.random.rand(10,4),columns=list('ABCD')) print df1 A B C D 0.860379 0.726956 0.394529 0.833217 0.014180 0.813828 0.559891 0.339647 0.782838 0.698993 0.551252 0.361034 0.833370 0.982056 0.741821 0.006864 0.855955 0.546562 0.270425 0.136006 0.491538 0.445024 0.971603 0.690001 0.911696 0.065338 0.796946 0.853456 0.744923 0.545661 0.492739 0.337628 0.576235 0.219831 0.946772 0.752403 0.164873 0.454862 0.745890 0.437729 I would like to