I want to find the mean, median and mode value for each year given a specific ZIP code how can I achieve this, I already read the data from CSV file and convert it to json file
Use SciPy.mstats:
In [2295]: df.DATE = pd.to_datetime(df.DATE).dt.year
In [2291]: import scipy.stats.mstats as mstats
In [2313]: def mode(x):
      ...:     return mstats.mode(x, axis=None)[0]
      ...: 
 In [2314]: df.groupby(['DATE', 'ZipCodes']).agg(["mean","median", mode])
Out[2314]: 
              SCORE            
               mean median mode
DATE ZipCodes                  
2017 44        88.0   88.0   88
     55        90.0   90.0   90
     66        92.5   92.5   90
     77        96.0   96.0   96
2018 33        90.0   90.0   90
     55        92.0   92.0   92
     66        97.0   97.0   97
2019 55        96.0   96.0   96
     77        90.0   90.0   90