ECDSACoin: TypeError when calling get_owner function

[billygarrison]

I get the following error when I run get_owner(coin):

TypeError: unhashable type: 'VerifyingKey'

Here's a timestamp of the ECDSACoin video where the code is executed:
https://www.youtube.com/watch?v=hujedHkaxLI&feature=youtu.be&t=2578

Traceback shows it is coming from this statement:

database = {
    bob_public_key: "Bob",
    alice_public_key: "Alice",
    bank_public_key: "Bank"
}

In the Traceback it has an arrow pointing to the bank_public_key: "Bank" line, but if I comment out that line then I get the same error but the arrow points to the alice_public_key: "Alice" line. And if I comment out that one it points to bob's line.

If I try to print(public_key) It prints:

ecdsa.keys.VerifyingKey object at 0x.........>

I'm running Python 3.6.3 and encounter this error with the ECDSACoin workbook noteobook as well as the solution notebook.

I was able to finish the ECDSACoin as it doesn't actually require get_owner.

[justinmoon]

Thanks for reporting. Fixed in 9f44a85#diff-eaf45354a1dc8df9f543a080468a9e42R229

[jodobear]

Just going through the bootcamp again and this bug still persists. Not sure how to solve this.

Edit: anyone know how to fix this?