How to use 'count duplicates pandas' in Python

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49def remove_duplicates(df_or_series):
50 """ Remove duplicate rows or values by keeping the first of each duplicate.
51
52 Parameters
53 ----------
54 df_or_series : :any:`pandas.DataFrame` or :any:`pandas.Series`
55 Pandas object from which to drop duplicate index values.
56
57 Returns
58 -------
59 deduplicated : :any:`pandas.DataFrame` or :any:`pandas.Series`
60 The deduplicated pandas object.
61 """
62 # CalTrack 2.3.2.2
63 return df_or_series[~df_or_series.index.duplicated(keep="first")]
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