How to find duplicate names using pandas?

Question

I have a pandas.DataFrame with a column called name containing strings. I would like to get a list of the names which occur more than once in the c

Answer 1

I had a similar problem and came across this answer.

I guess this also works:

counts = df.groupby('name').size()
df2 = pd.DataFrame(counts, columns = ['size'])
df2 = df2[df2.size>1]

and df2.index will give you a list of names with duplicates