Question

[更新后的问题，preserve_quotes可以正常工作]

无论输入中使用哪种类型的引号，如何强制输出使用单引号，但仅在使用引号的情况下？

注意：使用ruamel.yaml =>

的项目的（原始）源代码

https://github.com/looztra/yamkix（自以为是的Yaml格式化程序）
https://github.com/looztra/kubesplit/tree/v0_scooter（一种用于在单个流中将一组kubernetes资源拆分为一组文件的工具）

Answer 1

您的示例输出中的单引号已更改，即未保留一个最小的例子说明了事情并非如此。

import sys
import ruamel.yaml

yaml_str = """---
metadata:
  annotations:
    first: '1'
    second: any string
"""

yaml = ruamel.yaml.YAML(typ='rt')
data = list(yaml.load_all(yaml_str))
yaml.preserve_quotes = True
yaml.explicit_start = True
yaml.dump_all(data, sys.stdout)

给出：

---
metadata:
  annotations:
    first: '1'
    second: any string

使用您的format_yaml例程：

import sys
import pathlib
import ruamel.yaml
YAML = ruamel.yaml.YAML

yaml_file = pathlib.Path("temp.yaml")
yaml_file.write_text("""---
metadata:
  annotations:
    first: '1'
    second: any string
""")


def format_yaml(input_file,
                output_file,
                explicit_start=True,
                explicit_end=False,
                default_flow_style=False,
                dash_inwards=True,
                quotes_preserved=True,
                parsing_mode='rt'):
    """
    Load a file and save it formated :
    :param input_file: the input file
    :param output_file: the output file
    :param explicit_start: write the start of the yaml doc even when there is \
                            only one done in the file
    :param default_flow_style: if False, block style will be used for nested \
                              arrays/maps
    :param dash_inwards: push dash inwards if True
    :param quotes_preserved: preserve quotes if True
    :param parsing_typ: safe or roundtrip (rt) more
    """
    yaml = YAML(typ=parsing_mode)
    yaml.explicit_start = explicit_start
    yaml.explicit_end = explicit_end
    yaml.default_flow_style = default_flow_style
    yaml.preserve_quotes = quotes_preserved
    if dash_inwards:
        yaml.indent(mapping=2, sequence=4, offset=2)

    if input_file is not None:
        with open(input_file, 'rt') as f_input:
            parsed = yaml.load_all(f_input.read())
    else:
        parsed = yaml.load_all(sys.stdin.read())
    ready_for_dump = []
    try:
        # Read the parsed content to force the scanner to issue errors if any
        for data in parsed:
            ready_for_dump.append(data)
    except ScannerError as e:
        print("Something is wrong in the input file, got error from Scanner")
        print(e)
        return
    if output_file is not None:
        with open(output_file, 'wt') as out:
            yaml.dump_all(ready_for_dump, out)
    else:
        yaml.dump_all(ready_for_dump, sys.stdout)

format_yaml(yaml_file, None)

这还提供：

---
metadata:
  annotations:
    first: '1'
    second: any string

，如果在输入中使用双引号，则在输出中将获得双引号。因此，请提供一个最小完整示例程序，以显示该行为您所获得的信息，以及ruamel.yaml和python版本以及您在其上进行过测试的平台（上面在Linux 3.7.3上使用0.15.97进行了测试，在Linux上使用python 2.7.15（已安装pathlib2进行了测试））。

BTW，更改所有单引号字符串以转储为双引号字符串的最简单方法往返模式中的方法是通过重写represent_single_quoted_scalarstring方法（例如，通过为其分配一种yaml.representer方法）。

使用ruamel.yaml和preserve_quotes = True时，是否有一种方法可以强制双向yaml使用单引号？

1 个答案: