2011年6月17日 · @ 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).

2017年4月25日 · 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:

2014年4月3日 · The other case involving print >>obj, "Hello World" is the "print chevron" syntax for the print statement in Python 2 (removed in Python 3, replaced by the file argument of the print() function). Instead of writing to standard output, the output is passed to the obj.write() method. A typical example would be file objects having a write() method.

2023年3月21日 · The code in the question is pseudo-code; there, := represents assignment. For future visitors, though, the following might be more relevant: the next version of Python (3.8) will gain a new operator, :=, allowing assignment expressions (details, motivating examples, and discussion can be found in PEP 572, which was provisionally accepted in late June 2018).

2021年12月14日 · 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:

2013年1月17日 · 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 ...

2009年12月31日 · 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 ...

2024年8月23日 · 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 …

As almost any modern language, Python has assignment operators so they can use them every time you want to assign a value to a variable after doing some arithmetic or logical operation, both (assignment and operation) are expressed in a compact way …

It is x that has the value, so we want to know if x is equal to 4; we don't want to tell Python that it is. In that case, you need double =: >>> x = 4 >>> print x == 4 True In any place that you can use =, you can use ==; but it will have a different meaning. For example: >>> x = 4 >>> print x 4 >>> x == 4 True x = 4 tells Python that x is ...