regex on json file

[senaint]

so roughly speaking all the "id" keys are objects in a big array. I have tried various variation of the simple code below but I keep getting TypeError: the JSON object must be str, bytes or bytearray, not TextIOWrapper

import json
import os
  
rootfile = r'C:\\Users\\homer\\dumps\\cosmodb-sample.json'
with open(rootfile,'r') as file:
    json_data = json.loads(file) 
    for docs in json_data[0]:
        print(docs)

[
{
"id": "company-channelruleprintermap-8913-$pc2$company$8913$uspc02",
"ChannelRuleCollections": [
{
"Name": "Peak",
"State": 0,
"Modified": "2020-01-10T08:34:34.8015346Z"
}
]
},
{
"id": "company-channelruleprintermap-8913-$pc2$company$8913$uspc02",
"ChannelRuleCollections": [
{
"Name": "Peak",
"State": 0,
"Modified": "2020-01-10T08:34:34.8015346Z"
}
]
},
]