Getting false even when data exists

[sriniyum]

What is the exact value you enter, and what is the exact value of df['Customer Key']?

df['Customer Key'] will have all the values of the Customer Key from the csv file. User will input(enter) Customer Key or any number and it should be checked in the existing data of Customer Key. for valid i.e value exists in Customer Key print shud be True else it shud be false.