使用 ruamel.yaml 加载和转储时，如何使用 yamllint 强制注释位置有效？

Question

我希望能够 "reposition" yaml 文档中的现有注释，以便它们在生成的输出运行 yamllint 时有效，默认配置为 min-spaces-from-content=2（参考：https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.comments）。

根据，使用类似 yaml_add_eol_comment('the comment', 'the key', column=None) 的方法应该可以解决问题，但这不是我目前得到的结果。

这是我写的一段代码（在版本 0.16.7 中使用 ruamel.yaml）来演示我当前的行为：

"""Play with comments."""
from __future__ import print_function
import sys
import ruamel.yaml

yaml = ruamel.yaml.YAML()
yaml.indent(mapping=2, sequence=4, offset=2)
inp = """\
---
list-of-maps:
  - part_no:   A4786 # comment 1
    part_henon: mouhaha    # you're not funny
  - part_yes: A21 # also a comment here
    part_iculier: partenaire # I don't always understand how it works
    part_third: key # komment
list-only:
  - first # comment 2
  - third # I have a comment too
  - second # what?
simple-map:
  what-are-you-waiting-for: christmas? # duke nukem rulez
  jingle: bels # not christmas yet
map-of-maps:
  key:
    another-sub-key: w00t # casimir
    sub-key: sub-value # comment 3
    my-sub-key-name-is-longuer-than-yours: 1 # sentinel vs superman
"""

data = yaml.load(inp)


def process_comments(data, column=None):
    if isinstance(data, dict):
        if data.ca:
            if data.ca.items:
                for key in data.ca.items.keys():
                    if data.ca.items[key][2]:
                        comment = data.ca.items[key][2].value.replace("\n", "")
                        data.yaml_add_eol_comment(comment, key, column=column)
        for k, v in data.items():
            process_comments(k, column=column)
            process_comments(v, column=column)
    elif isinstance(data, list):
        if data.ca:
            if data.ca.items:
                for key in data.ca.items.keys():
                    if data.ca.items[key][0]:
                        comment = data.ca.items[key][0].value.replace("\n", "")
                        data.yaml_add_eol_comment(comment, key, column=column)
        for elem in data:
            process_comments(elem, column=column)


process_comments(data, column=None)
yaml.dump(data, sys.stdout)

预期输出为：

list-of-maps:
  - part_no: A4786  # comment 1
    part_henon: mouhaha  # you're not funny
  - part_yes: A21  # also a comment here
    part_iculier: partenaire  # I don't always understand how it works
    part_third: key  # komment
list-only:
  - first  # comment 2
  - third  # I have a comment too
  - second  # what?
simple-map:
  what-are-you-waiting-for: christmas?  # duke nukem rulez
  jingle: bels  # not christmas yet
map-of-maps:
  key:
    another-sub-key: w00t  # casimir
    sub-key: sub-value  # comment 3
    my-sub-key-name-is-longuer-than-yours: 1  # sentinel vs superman

实际输出为：

list-of-maps:
  - part_no: A4786  # comment 1
    part_henon: mouhaha # you're not funny
  - part_yes: A21  # also a comment here
    part_iculier: partenaire # I don't always understand how it works
    part_third: key # komment
list-only:
  - first # comment 2
  - third # I have a comment too
  - second # what?
simple-map:
  what-are-you-waiting-for: christmas?  # duke nukem rulez
  jingle: bels # not christmas yet
map-of-maps:
  key:
    another-sub-key: w00t  # casimir
    sub-key: sub-value # comment 3
    my-sub-key-name-is-longuer-than-yours: 1 # sentinel vs superman

看来是:

对于 CommentedMaps，第一个键的注释在 # 之前有两个 space，但与 CommentedMap
对于 CommentedSeqs，#

我是不是漏掉了什么？

补充信息：

顺便说一下，一个更简单的例子给出了相同的 output/behaviour :

"""Test comments on a very simple CommentedMap."""
import sys
import ruamel.yaml


comment_column = None
insert = ruamel.yaml.comments.CommentedMap()
insert["test"] = "asdf"
insert.yaml_add_eol_comment("Test Comment!", "test", column=comment_column)
insert["second-key"] = "yop"
insert.yaml_add_eol_comment("Another comment", "second-key", column=comment_column)

yaml = ruamel.yaml.YAML()
yaml.dump(insert, sys.stdout)

输出：

test: asdf  # Test Comment!
second-key: yop # Another comment

免责声明：

非常感谢 ruamel.yaml 的作者，这是一个很棒的库 ... 感谢您观看有关库的问题
我根本不是在假装自己是一个优秀的python开发人员所以如果我的代码质量不佳请原谅我

Answer 1

您在映射的第一条评论上得到两个 space 是一个错误。如果你不指定一个列，该列是根据前面的键猜测的。为了第一映射中的键值对不可用，导致略有不同代码路径。

修复该错误对您没有帮助，您必须提供自己的 yaml_add_eol_comment 总是添加额外的 space:

import sys
import ruamel.yaml


yaml = ruamel.yaml.YAML()
yaml.indent(mapping=2, sequence=4, offset=2)
inp = """
list-of-maps:
  - part_no: A4786 # comment 1
    part_henon: mouhaha    # you're not funny
  - part_yes: A21 # also a comment here
    part_iculier: partenaire # I don't always understand how it works
    part_third: key # komment
list-only:
  - first # comment 2
  - third # I have a comment too
  - second # what?
simple-map:
  what-are-you-waiting-for: christmas? # duke nukem rulez
  jingle: bels # not christmas yet
map-of-maps:
  key:
    another-sub-key: w00t # casimir
    sub-key: sub-value # comment 3
    my-sub-key-name-is-longuer-than-yours: 1 # sentinel vs superman
"""

data = yaml.load(inp)


def my_add_eol_comment(self, comment, key=ruamel.yaml.comments.NoComment, column=None):
    org_col = column
    if column is None:
        try:
            column = self._yaml_get_column(key)
        except AttributeError:
            column = 0
    if comment[0] != '#':
        comment = '# ' + comment
    if org_col != 0:  # only do this if the specified colunn is not the beginning of the line
        if comment[0] == '#':
            comment = ' ' + comment
            column = 0
    start_mark = ruamel.yaml.error.CommentMark(column)
    ct = [ruamel.yaml.tokens.CommentToken(comment, start_mark, None), None]
    self._yaml_add_eol_comment(ct, key=key)

ruamel.yaml.comments.CommentedBase.yaml_add_eol_comment = my_add_eol_comment


def process_comments(data, column=None):
    if isinstance(data, dict):
        if data.ca:
            if data.ca.items:
                for key in data.ca.items.keys():
                    if data.ca.items[key][2]:
                        comment = data.ca.items[key][2].value.replace("\n", "")
                        data.yaml_add_eol_comment(comment, key, column=column)
        for k, v in data.items():
            process_comments(k, column=column)
            process_comments(v, column=column)
    elif isinstance(data, list):
        if data.ca:
            if data.ca.items:
                for key in data.ca.items.keys():
                    if data.ca.items[key][0]:
                        comment = data.ca.items[key][0].value.replace("\n", "")
                        data.yaml_add_eol_comment(comment, key, column=column)
        for elem in data:
            process_comments(elem, column=column)

process_comments(data, column=None)
yaml.dump(data, sys.stdout)

给出：

list-of-maps:
  - part_no: A4786  # comment 1
    part_henon: mouhaha  # you're not funny
  - part_yes: A21  # also a comment here
    part_iculier: partenaire  # I don't always understand how it works
    part_third: key  # komment
list-only:
  - first  # comment 2
  - third  # I have a comment too
  - second  # what?
simple-map:
  what-are-you-waiting-for: christmas?  # duke nukem rulez
  jingle: bels  # not christmas yet
map-of-maps:
  key:
    another-sub-key: w00t  # casimir
    sub-key: sub-value  # comment 3
    my-sub-key-name-is-longuer-than-yours: 1  # sentinel vs superman

使用 ruamel.yaml 加载和转储时，如何使用 yamllint 强制注释位置有效？

How to force the comment position to be valid with yamllint when load and dump with ruamel.yaml?

python

ruamel.yaml