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Please instruct me, the following error occurs when the code is running in main AttributeError: ooOooo000oOO instance has no attribute '__getitem__'

Author: yummyhu, Created: 2018-06-17 14:51:59, Updated:

def main(): action = “Buy” _C(exchange[action],-1,0.01)

Can't the invoice be written like that?

img

How does this work?


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Inventors quantify - small dreamsJS can be called like this, python does not, python's exchange is undefined.