import pandas as pd
data = {
"name": ["Bill", "Bob", "Betty"],
"age": [50, 50, 30],
"qualified": [True, False, False]
}
df = pd.DataFrame(data)
newdf = df.replace(50, 60)
print(newdf)
name age qualified 0 Bill 60 True 1 Bob 60 False 2 Betty 30 False