是否有可能在Python中将多行换成多行 [英] Is it possible to break a long line to multiple lines in Python

问题描述

就像C一样，您可以将一条长线分成多条短线.但是在 Python 中，如果执行此操作，将会出现缩进错误...可能吗?

Just like C, you can break a long line into multiple short lines. But in Python, if I do this, there will be an indent error... Is it possible?

推荐答案

来自 PEP 8 -Python代码样式指南:

包裹长行的首选方法是使用Python的隐含行 括号，方括号和大括号内的延续.如有必要，您 可以在表达式周围添加一对括号，但是有时 使用反斜杠看起来更好.确保缩进续行 适当地.

The preferred way of wrapping long lines is by using Python's implied line continuation inside parentheses, brackets and braces. If necessary, you can add an extra pair of parentheses around an expression, but sometimes using a backslash looks better. Make sure to indent the continued line appropriately.

隐式连续行的示例:

a = some_function(
    '1' + '2' + '3' - '4')

关于围绕二进制运算符的换行符，它继续说:-

On the topic of line-breaks around a binary operator, it goes on to say:-

几十年来，推荐的样式是在二元运算符之后使用. 但这会以两种方式损害可读性:运算符趋向于分散在屏幕上的不同列上，并且每个运算符都从其操作数移至上一行.

For decades the recommended style was to break after binary operators. But this can hurt readability in two ways: the operators tend to get scattered across different columns on the screen, and each operator is moved away from its operand and onto the previous line.

在Python代码中，只要约定在本地是一致的，就可以在二进制运算符之前或之后中断.对于新代码，建议使用Knuth的样式(在操作符之前换行).

In Python code, it is permissible to break before or after a binary operator, as long as the convention is consistent locally. For new code Knuth's style (line breaks before the operator) is suggested.

显式续行的示例:

a = '1'   \
    + '2' \
    + '3' \
    - '4'

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