There are three types of comments in Python: Single-line comments Multi-line comments Documentation comment Single-line comments To add a single-line comment, you need to put the # symbol at the beginning of your line. This will cause Python to ignore what you have written and instead treat...
Just as there are standards for writing Python comments, there are a few types of comments that don’t lead to Pythonic code. Here are just a few. Avoid: W.E.T. Comments Your comments should be D.R.Y. The acronym stands for the programming maxim “Don’t Repeat Yourself.” This mea...
单行注释应该在#符号后有一个空格: #Don't write comments immediately after the # sign. 注释可以包含指向包含相关信息的 URL 的链接,但链接永远不应该取代注释,因为链接的内容可能随时从互联网上消失: # Here is a detailed explanation about some aspect of the code# that is supplemented by a URL. More...
$ python headlines.py --- Type Comments Work --- $ mypy headline.py $ 如果传入一个字符串width="full",再次运行mypy会出现一下错误。$ mypy headline.py headline.py:10: error: Argument "width" to "headline" has incompatible type "str"; expected "int" 您还可以向变量添加类型注释。这与您向...
#Don't write comments immediately after the # sign. 1. 注释可以包含指向包含相关信息的 URL 的链接,但链接永远不应该取代注释,因为链接的内容可能随时从互联网上消失: # Here is a detailed explanation about some aspect of the code # that is supplemented by a URL. More info at https://example....
Type Comments[类型注解] 如上所述,注释是在Python 3中引入的,并且它们没有被反向移植到Python 2.这意味着如果您正在编写需要支持旧版Python的代码,则无法使用注释。 要向函数添加类型注释,您可以执行以下操作: import math def circumference(radius): # type: (float) -> float return 2 * math.pi * radius...
#Don't write comments immediately after the # sign. 注释可以包含指向包含相关信息的 URL 的链接,但链接永远不应该取代注释,因为链接的内容可能随时从互联网上消失: # Here is a detailed explanation about some aspect of the code # that is supplemented by a URL. More info at https://example.com ...
$ python headlines.py--- Type Comments Work --- $ mypy headline.py$ 1. 2. 如果传入一个字符串width="full",再次运行mypy会出现一下错误。 $ mypy headline.pyheadline.py:10: error: Argument "width" to "headline" has incompatible type "str"; expected "int" 1. 您还可以向变量添加...
When running code, Python ignores everything from the # that starts a comment until the end of the line. For more on comments see commenting in Python. Trailing comma A "trailing comma" is a comma after the last element in a list, dictionary, tuple, or set literal or within a function...
Commenting Tips: The most useful comments are those written with the goal of learning from or helping out other students. Get tips for asking good questions and get answers to common questions in our support portal. Looking for a real-time conversation? Visit the Real Python Community Chat or...