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| import pandas as pd | |
| managerDF = pd.DataFrame({'id':[101, 102, 103, 104, 105, 106, 107, 108], | |
| 'managerId':['D025', 'A010', 'C020', 'A010', 'D025', 'D025','A010', 'D025']}) | |
| managerDF['managerIdCount'] = managerDF['managerId'].map(managerDF.groupby('managerId').size()) | |
| managerDF.drop(['managerId'], axis=1, inplace=True) | |
| print(managerDF) |
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