duplicated()

# উদাহরণ  duplicated()
data = {'Name': ['John', 'Alice', 'Bob', 'Alice'],
        'Age': [25, 30, 35, 30],
        'City': ['New York', 'London', 'Paris', 'London']}

df = pd.DataFrame(data)
print(df.duplicated())

0    False
1    False
2    False
3     True
dtype: bool

df.duplicated().sum()
#output
1