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Jun 17, 2011 · @ symbol is a syntactic sugar python provides to utilize decorator, to paraphrase the question, It's exactly about what does decorator do in Python? Put it simple decorator allow you to modify a given function's definition without touch its innermost (it's closure).
Apr 25, 2017 · It's an operator in Python that can mean several things depending on the context. A lot of what follows was already mentioned (or hinted at) in the other answers but I thought it could be helpful to provide a more extensive summary. % for Numbers: Modulo operation / Remainder / Rest. The percentage sign is an operator in Python. It's described as:
Dec 14, 2021 · Generally speaking, the symbol ^ is an infix version of the __xor__ or __rxor__ methods. Whatever data types are placed to the right and left of the symbol must implement this function in a compatible way. For integers, it is the common XOR operation, but for example there is not a built-in definition of the function for type float with type int:
Dec 31, 2009 · In Python, the | symbol is used as a bitwise OR operator for integers and a union operator for sets and some other data structures. Bitwise OR for Integers. When used between two integers, | performs a bitwise OR operation. This means it compares each bit of the integers and returns a new integer where each bit is set to 1 if at least one of ...
Jan 17, 2013 · As other answers have stated, the -> symbol is used as part of function annotations. In more recent versions of Python >= 3.5 , though, it has a defined meaning. PEP 3107 -- Function Annotations described the specification, defining the grammar changes, the existence of func.__annotations__ in which they are stored and, the fact that it's use case is still open.
Jun 16, 2012 · Python is dynamically, but strongly typed, and other statically typed languages would complain about comparing different types. There's also the else clause: # This will always print either "hi" or "no hi" unless something unforeseen happens. if hi == "hi": # The variable hi is being compared to the string "hi", strings are immutable in Python, so you could use the 'is' operator.
Jan 12, 2022 · The ** operator will, internally, use an iterative function (same semantics as built-in pow() (Python docs), which likely means it just calls that function anyway). Therefore, if you know the power and can hardcode it, using 2*2*2 would likely be a little faster than 2**3 .
Oct 15, 2011 · 2. Using Python’s math module. import math positive_infinity = math.inf negative_infinity = -math.inf 3. Integer maxsize. import sys maxSize = sys.maxsize minSize = -sys.maxsize 4. Using Python’s decimal module. from decimal import Decimal positive_infinity = Decimal('Infinity') negative_infinity = Decimal('-Infinity') 5. Using Numpy Library
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.
In Python 2.2 or later in the 2.x line, there is no difference for integers unless you perform a from __future__ import division, which causes Python 2.x to adopt the 3.x behavior. Regardless of the future import, 5.0 // 2 will return 2.0 since that's the floor division result of the operation.
