Symbol class warnings..

[krs-world]

Seeing these warnings in Symbol.py:

python3 book_analysis.py
/Users/kalpathi/gr/bridges/client/python/bridges/symbol.py:258: SyntaxWarning: "is" with a literal. Did you mean "=="?
if len(args) is 1:
/Users/kalpathi/gr/bridges/client/python/bridges/symbol.py:262: SyntaxWarning: "is" with a literal. Did you mean "=="?
elif len(args) is 2:
/Users/kalpathi/gr/bridges/client/python/bridges/symbol.py:267: SyntaxWarning: "is" with a literal. Did you mean "=="?
elif len(args) is 4:
/Users/kalpathi/gr/bridges/client/python/bridges/symbol.py:281: SyntaxWarning: "is" with a literal. Did you mean "=="?
if len(args) is 1:
/Users/kalpathi/gr/bridges/client/python/bridges/symbol.py:295: SyntaxWarning: "is" with a literal. Did you mean "=="?
elif len(args) is 3:
500 Server Error: INTERNAL SERVER ERROR for url: http://bridges-data-server-gutenberg.bridgesuncc.org/book?id=102

[krs-world]

The above server errors usually comes when you start with an empty cache, if that helps. Another strange thing I saw was that the final books found dont match t he book ids of the errors.

[krs-world]

These are all the data server errors:

500 Server Error: INTERNAL SERVER ERROR for url: http://bridges-data-server-gutenberg.bridgesuncc.org/book?id=102
504 Server Error: Gateway Time-out for url: http://bridges-data-server-gutenberg.bridgesuncc.org/book?id=1112
504 Server Error: Gateway Time-out for url: http://bridges-data-server-gutenberg.bridgesuncc.org/book?id=13214
504 Server Error: Gateway Time-out for url: http://bridges-data-server-gutenberg.bridgesuncc.org/book?id=17951
RUNTIME TIME: 978.7776627540588

It did run to completion..

[AlecGoncharow]

This is an easy fix

Basically

• is: the equivalent of Object == MaybeAnotherObject in Java, meaning it compares the values of the pointers rather than value equality
• ==: the equivalent of obj.equals(other), meaning it will defer the result to the magic method __eq__ on the object, typically doing a value based comparison rather than reference