Python

df.duplicated().sum()

boolean = df['Student'].duplicated().any() # True

# Display if the column(s) contain duplicates in the DataFrame
df.sum().duplicated()

animals = pd.Series(['lama', 'cow', 'lama', 'beetle', 'lama'])
>>> animals.duplicated()

ids = df["ID"]
df[ids.isin(ids[ids.duplicated()])].sort_values("ID")

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