Predictive Hacks

How to check if a value is contained in the columns of a Pandas Dataframe

import pandas as pd
df = pd.DataFrame({"A"  : ["a", "b", "c"], "B" : ["d", "e", "f"], "C" : ["x", "y" , "a"]})
   A  B  C
0  a  d  x
1  b  e  y
2  c  f  a
A     True
B    False
C     True

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