如何防止在使用ruamel.yaml.scalarstring.DoubleQuotedScalarString?时将换行符\字符输出到YAML

Question

我正在尝试使用ruamel.yaml将python字典写入yaml文件。我需要显式引用一些字符串，所以我将它们传递给ruamel.yaml.scalarstring.DoubleQuotedScalarString，它在输出中用双引号将它们括起来。但是，包含在多行中的字符串在输出中包含\字符。我如何防止这种情况发生？

在将字符串传递给ruamel.yaml.scalarstring.DoubleQuotedScalarString并将其替换为'‘之后，我尝试使用正则表达式搜索\，但这不起作用。我认为这些字符是在转储时添加的。

S = ruamel.yaml.scalarstring.DoubleQuotedScalarString
string = "The Parkinson's Disease Sleep Scale-Validation (PDSS-2) is a scale used to characterise and quantify the various aspects of nocturnal sleep problems in Parkinson's disease (PD). The PDSS-2 is a revised version of the Parkinson's Disease Sleep Scale (PDSS)."
st = S(string)
data = {'key': st}

f = open('./yam.yaml', 'w')
yaml= YAML()
yaml.default_flow_style = False
yaml.indent(offset = 2, sequence = 4, mapping = 2)
yaml.dump(data, f)

期望值：

key: "The Parkinson's Disease Sleep Scale-Validation (PDSS-2) is a scale used to characterise and quantify the various aspects of nocturnal sleep problems in Parkinson's disease (PD). The PDSS-2 is a revised version of the Parkinson's Disease Sleep Scale (PDSS)."

实际：

key: "The Parkinson's Disease Sleep Scale-Validation (PDSS-2) is a scale used to characterise\
  \ and quantify the various aspects of nocturnal sleep problems in Parkinson's disease\
  \ (PD). The PDSS-2 is a revised version of the Parkinson's Disease Sleep Scale (PDSS)."

Answer 1

您所看到的是由换行引起的，它试图将输出中行的长度限制为缺省值80个字符。

如果您可以接受更大的输出，那么只需将yaml.width设置为更大的值：

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

S = ruamel.yaml.scalarstring.DoubleQuotedScalarString
string = "The Parkinson's Disease Sleep Scale-Validation (PDSS-2) is a scale used to characterise and quantify the various aspects of nocturnal sleep problems in Parkinson's disease (PD). The PDSS-2 is a revised version of the Parkinson's Disease Sleep Scale (PDSS)."
st = S(string)
data = {'key': st}

yaml= YAML()
yaml.width = 2048
yaml.default_flow_style = False
yaml.indent(offset = 2, sequence = 4, mapping = 2)
yaml.dump(data, sys.stdout)

这就给出了：

key: "The Parkinson's Disease Sleep Scale-Validation (PDSS-2) is a scale used to characterise and quantify the various aspects of nocturnal sleep problems in Parkinson's disease (PD). The PDSS-2 is a revised version of the Parkinson's Disease Sleep Scale (PDSS)."