...Error: The truth value of an array is ambiguous. Use a.empty, a.any() or a.all(). when used as a boolean value. That's because its unclear when it should be True or False. Some users might assume they are True if they have non-zero length, like a Python list. Others might desire for it to be True ...

...t, and changing a reference. s2 still points to the same object as we initially set s1 to point to. Setting s1 to "Help!" only changes the reference, while the String object it originally referred to remains unchanged. If strings were mutable, we could do something like this: String s1 = "Hello"; St...

...ice implementation. I'm just here to point out some style stuff. python usually does node is not None instead of your (node!=None). Also, you can use the __str__ function instead of the printTree method. – Jeff Mandell Oct 18 '15 at 2:30 ...

.... This is the closest equivalent to Java's final. However, it does not actually prevent reassignment: from typing import Final a: Final = 1 # Executes fine, but mypy will report an error if you run mypy on this: a = 2 sha...

...of the exception hierarchy. Provides an 'args' attribute that contains all arguments passed to the constructor. Suggested practice, though, is that only a single string argument be passed to the constructor.""" __str__ and __repr__ are already implemented in a meaningful way, especiall...

... server's certificate is probably not trusted by the client. This would usually result in a more verbose error, but it is quite possible. Usually the fix is to import the server's CA certificate into the client's trust store. The cerificate is issued for a different domain. Again, this would have re...

... we test our sites in Firefox, Safari, IE6, IE7 and Opera. These browsers all understand that URL format. share | improve this answer | follow | ...

...own, just like simple variable initializers) when the class is loaded (actually, when it's resolved, but that's a technicality). Instance initializers are executed in the order defined when the class is instantiated, immediately before the constructor code is executed, immediately after the invocat...

...turn the size of an object in bytes. The object can be any type of object. All built-in objects will return correct results, but this does not have to hold true for third-party extensions as it is implementation specific. Only the memory consumption directly attributed to the object is accounted for...

...specific, and are slightly more detailed than some others have suggested. All identifiers that contain a double underscore or start with an underscore followed by an uppercase letter are reserved for the use of the implementation at all scopes, i.e. they might be used for macros. In addition, all ...