File "site-packages\electrum-3.1.3-py3.5.egg\electrum\util.py", line 794, in run_with_except_hook
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\network.py", line 985, in run
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\network.py", line 967, in wait_on_sockets
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\network.py", line 626, in process_responses
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\network.py", line 572, in process_response
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\network.py", line 826, in on_get_header
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\blockchain.py", line 90, in check_header
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\blockchain.py", line 136, in check_header
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\blockchain.py", line 283, in get_hash
  File "site-packages\electrum-3.1.3-py3.5.egg\electrum\blockchain.py", line 267, in read_header