Exporting the Files by API using Python

@riyazpasha 

Some thoughts.

• No issue with Chunks if you're using Python.
• But you should iterate on the chunks by first querying Anaplan (JSON will be returned) to determine how many chunks are needed. I'll post the code below.
• Having said that, your issue looks different. It looks like it's not finding that ID.
• The good news is that the export action and the download action use the same ID (different RESTful endpoints though).
• Lastly, make sure you have saved the export action as "Everyone". This can revert back to private if you change the saved view and forget to save instead as "everyone"

# This script downloads a file in chunks. It will write all chunks to a newly
# created local file with the same name as the file.
import requests
import base64
import sys
import json
from getAuthentication import userBA
from getGUIDs import wGuid, mGuid, fileID, fileName

url = (f'https://api.anaplan.com/1/3/workspaces/{wGuid}/models/{mGuid}/' +
f'files/{fileID}/chunks')

getHeaders = {
'Authorization': userBA
}

downloadHeaders = {
'Authorization': userBA,
'Accept': 'application/octet-stream'
}

getChunkData = requests.get(url,
headers=getHeaders)
with open('downloadChunkData.json', 'wb') as f:
f.write(getChunkData.text.encode('utf-8'))

with open('downloadChunkData.json', 'r') as f:
f2 = json.load(f)

with open(f'{fileName}', 'wb') as f:
for i in f2:
chunkData = i
chunkID = i['id']
print(f'Getting chunk {chunkID}')
getChunk = requests.get(url + f'/{chunkID}',
headers=downloadHeaders)
f.write(getChunk.content)
print('Status code: ' + str(getChunk.status_code))