operator-overloading

Why does a^=b throw an error when a=a^b does not?

Why does a^=b throw an error when a=a^b does not? Question: My class’ xor function is working as intended but when doing a^=b, I get ‘TypeError: unsupported operand type(s) for ^=: ‘NoneType’ and ‘Multiset.” Relevant code below: def __xor__(self,o): d=Multiset() #subclass of dict for x in self|o: #for each item in both multisets m=abs((self[x] if …

Total answers: 1

Is it possible to overload <> in python

Is it possible to overload <> in python Question: I just came to know that you can overload operators in python using __add__ or __sub__ etc. Even [] can be overloaded with __getitem__. So it is possibe to overload <> like load_text<"file.txt">. Asked By: NrdyBhu1 || Source Answers: You can’t overload an operator that doesn’t …

Total answers: 1

Python Pulp Solver: How to use compare signs (>= or <=) as variables in equation?

Python Pulp Solver: How to use compare signs (>= or <=) as variables in equation? Question: Hello I am trying to develop a Python Pulp Linear Programming solver which is not hard-coded but instead takes all input from the user. I have successfully done the part of objective function but I am having problem with …

Total answers: 1

How can we write a `__getitem__` method which accepts any iterable as input, and chains the items together?

How can we write a `__getitem__` method which accepts any iterable as input, and chains the items together? Question: How can we turn cookiejar[(1, 2, 3)] into cookiejar[1][2][3]? What is the desired behavior? The following two pieces of code (LEFT CODE and RIGHT CODE) should do the same thing when calling __getitem__ +———————-+————————–+ | LEFT …

Total answers: 2

What do operators '>>' and '|' mean in this case?

What do operators '>>' and '|' mean in this case? Question: import apache_beam as beam with beam.pipeline() as pipeline: lines = pipeline | ‘ReadMyFile’ >> beam.io.ReadFromText( ‘gs://some/inputData.txt’) What I know is that ‘>>’ means shift right and ‘|’ is logical or. However, I do not understand what is their purpose here? Asked By: Ahmed Jabareen …

Total answers: 2

Is i = i + n truly the same as i += n?

Is i = i + n truly the same as i += n? Question: One block of code works but the other does not. Which would make sense except the second block is the same as the first only with an operation written in shorthand. They are practically the same operation. l = [‘table’] i …

Total answers: 3

Overriding the 'not' operator in Python

Overriding the 'not' operator in Python Question: I cannot find the method corresponding to not x operator. There is one for and, or, and xor, though. Where is it? 3. Data model Asked By: ArekBulski || Source Answers: There is one for and, or, and xor, though The methods you’re looking at are for bitwise …

Total answers: 2

Applications of '~' (tilde) operator in Python

Applications of '~' (tilde) operator in Python Question: I just discovered the bitwise complement unary operation in Python via this question and have been trying to come up with an actual application for it, and if not, to determine if it’s generally safe to overload the operator (by overriding the __invert__ method) for other uses. …

Total answers: 7

Error when trying to overload an operator "/"

Error when trying to overload an operator "/" Question: I recently start teaching myself game programming. Someone recommend me to start with Python and I got the book “Beginning game development with Python and Pygame: From novice to professional”. I got to a part where they teach about Vectors and creating a Vector2 class. Everything …

Total answers: 2

Overload () operator in Python

Overload () operator in Python Question: I am trying to learn currying in Python for my class and I have to overload the () operator for it. However, I do not understand how can I can go about overloading the () operator. Can you explain the logic behind overloading the parentheses? Should I overload first …

Total answers: 1