Python 语法,这是哪条规则允许这样做的?

[chaleaoch]

我试了一下,是有效的.

[no1xsyzy]

这个甚至可以混杂 f-string r-string 甚至 three quote string
print("normal string\n"
r"r-string, but \n is just \n" ", for LF use another normal string at end\n"
f"f-string, {2+3=}\n"
f"""three-quote f-string{ " ".join(str(i) for i in range(10)) }""")

[bwangel]

https://docs.python-guide.org/writing/style/#line-continuations

Python Guide 这个文档真的挺好的，值得一读。