File "site-packages\electrum-3.1.2-py3.5.egg\electrum\util.py", line 798, in run_with_except_hook
  File "site-packages\electrum-3.1.2-py3.5.egg\electrum\network.py", line 984, in run
  File "site-packages\electrum-3.1.2-py3.5.egg\electrum\network.py", line 966, in wait_on_sockets
  File "site-packages\electrum-3.1.2-py3.5.egg\electrum\network.py", line 625, in process_responses
  File "site-packages\electrum-3.1.2-py3.5.egg\electrum\network.py", line 571, in process_response
  File "site-packages\electrum-3.1.2-py3.5.egg\electrum\network.py", line 825, in on_get_header
  File "site-packages\electrum-3.1.2-py3.5.egg\electrum\blockchain.py", line 86, in check_header
  File "site-packages\electrum-3.1.2-py3.5.egg\electrum\blockchain.py", line 132, in check_header
  File "site-packages\electrum-3.1.2-py3.5.egg\electrum\blockchain.py", line 277, in get_hash
  File "site-packages\electrum-3.1.2-py3.5.egg\electrum\blockchain.py", line 259, in read_header