I'm trying to pull historic data from the Coinbase Pro api using Python with the cbpro package. For some reason I either hit an error, or can only pull data from the last 350 days.

If I run the following:

import time
import cbpro
import csv
import json
import shutil
import os
start_time = time.time()
end_time = start_time-(86400*300)
public_client = cbpro.PublicClient()
public_client.get_product_historic_rates('ETH-USD')
data = public_client.get_product_historic_rates('ETH-USD', granularity=86400,
                                                start = start_time,
                                                end = end_time)

Then I get an "invalid interval" error. If however I remove either the "start = start_time" or "end = end_time" part of the code I get the last 350 days worth of historic data. No matter ISO 8601 time I list as "start" or "end," I'm always getting back the last 350 days starting with today.

What am I doing wrong?