[python] Python Pandas - Find difference between two data frames

As mentioned here that

df1[~df1.apply(tuple,1).isin(df2.apply(tuple,1))]

is correct solution but it will produce wrong output if

df1=pd.DataFrame({'A':[1],'B':[2]})
df2=pd.DataFrame({'A':[1,2,3,3],'B':[2,3,4,4]})

In that case above solution will give Empty DataFrame, instead you should use concat method after removing duplicates from each datframe.

Use concate with drop_duplicates

df1=df1.drop_duplicates(keep="first") 
df2=df2.drop_duplicates(keep="first") 
pd.concat([df1,df2]).drop_duplicates(keep=False)

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