csv to nested JSON? [closed]

Answer 1

Here's the general way of doing so with csv.DictReader.

Start by loading the data:

import csv
import itertools
with open('stuff.csv', 'rb') as csvfile:
    all_ = list(csv.DictReader(csvfile))

Now, you can use itertools.groupby to group and process each group. For example

d = []
for k, g in itertools.groupby(
        all_, 
        key=lambda r: (r['PrimaryId'], r[' LastName'])):
    d.append({
        'PrimaryId': k[0],
        'LastName': k[1],
        'CarName': [e[' CarName'] for e in g]
        })

Will group by primary id and last name, and make a list of cars.

Once you have something like this, you can just use json.dumps().