wat.py

import requests
from pprint import pprint
postID = '7dn55x'
#c=requests.get('https://api.pushshift.io/reddit/search/comment/?ids=' + ','.join(requests.get('https://api.pushshift.io/reddit/submission/comment_ids/' + postID).json()['data'])).json()['data']
import ast
c = ast.literal_eval(open ('/tmp/data').read ())

class RedditComment ():
    def __init__ (self, id_, parent_id, other_stuff):
        self.id_ = id_
        self.parent_id = parent_id
        self.other_stuff = other_stuff
        self.children = []

    def __repr__ (self):
        return '{} (child of {}): {}'.format (self.id_, self.parent_id, self.other_stuff['body'])


comments_by_id = {}

for comment_data in c:
    comment = RedditComment (
        id_ = comment_data['id'],
        parent_id = comment_data.get ('parent_id'),
        other_stuff = comment_data
    )

    comments_by_id[comment.id_] = comment
    if comment.parent_id and comment.parent_id in comments_by_id:
        comments_by_id[comment.parent_id].children.append (comment)

pprint (comments_by_id)