How to use 'nunique pandas' in Python
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673 def _unique(df, columns=None): 674 if isinstance(columns, str): 675 columns = [columns] 676 if not columns: 677 columns = df.columns.tolist() 678 info = {} 679 for col in columns: 680 values = df[col].dropna().values 681 uniques = np.unique(list(_flatten_list(values))).tolist() 682 info[col] = {'count': len(uniques), 'values': uniques} 683 return info
280 def nunique(self): 281 """ 282 Find the number of unique values in each column 283 284 Returns 285 ------- 286 A DataFrame 287 """ 288 pass