如何指定reStructuredText字段列表宽度以避免内容换行？

Got it, let's tackle this problem where your :param field wraps into multiple lines because the parameter description is too long. You want that first line of the field list to stay a single line, right?

The core issue here is that most reStructuredText parsers default to wrapping field list lines based on a fixed width limit. Here's how you can fix it:

1. Adjust Document Line Width (Local Builds) #

If you're using tools like Sphinx or rst2html, you can set a custom line width to fit your longest field descriptions:

For Sphinx (in conf.py): #

# Set a line width wide enough to accommodate your longest parameter text
line_width = 150

For command-line tools like rst2html: #

rst2html --line-width=150 your_document.rst output.html

Pick a value larger than the length of your longest :param line, and the parser will keep the entire field content on a single line.

2. Note on Online Preview Tools #

Most online RST preview tools have fixed, unadjustable line width settings. If you're testing there, you might not be able to force single-line display—your best bet is to use a local build environment where you control the width parameters.

Here's your original code example, which will render as a single line once you set the appropriate line width:

:param parameter1: this is the first param..........
:returns:

内容的提问来源于stack exchange，提问作者nyi