Python's Unicode support can be easily abused to hide malicious string matches, making code appear innocuous while still performing malicious behavior. In this case, the stealing of sensitive data ...

However, should the abuse of Unicode for hiding malicious Python code become a trend, it might become cause for concern. "But, whomever this author copied this obfuscated code from is clever ...

Unicode contains characters from various languages, including the Latin alphabet, but there are only four characters that have separate types registered in addition to 'uppercase' and 'lowercase'.