How to import private key on testnet and verify balance of wallet?
I wrote this python library since pybitcointools is no longer supported. You can check testnet balances like this (it pulls data from blockchain.info)

import os
os.environ['CRYPTOTOOLS_NETWORK'] = 'test'

from btctools import Address

address = Address('n2NGrooSecJaiD6ssp4YqFoj9eZ7GrCJ66')

&gt;&gt;&gt; address.balance()
0.55