How to check whether the data is in a CSV file using Python

Question

i have data csv

word,label
relax,1
angry,0
happy,1
sad,3

and I want to check whether the word already exists in CSV data

My code is like this and doesn't match what I want

import pandas as pd
data = pd.read_csv('data/hasil_cluster2.csv',encoding = "ISO-8859-1") 
ip="key"
for index,row in data.iterrows():
    if ip is row[0]:
        print('data found')
        break
    else:
        print(row[0])

Answer 1

It check complete dataframe the key if abc exist in any column it would return those rows else it would be empty

key = 'abc'
df = df[df.eq(key).any(axis=1)]
if df.empty:
    print("empty")
else:
   print("key found")