You can only find it if someone has used it on the blockchain, and spent those satoshis. Or you generate it completely randomly yourself(good luck)
#python 2
import time
import requests
addresses = open('addr.txt', 'r').read().split('\n')
for address in addresses:
if address == '':
continue
response = requests.get('
https://blockchain.info/q/pubkeyaddr/' + address)
if response.status_code == 200:
if response.text != '':
open('pubkeys.txt', 'a').write(address + ' : ' + response.text+"\n")