Python转储YAML在字符串周围使用双引号 [英] Python Dump YAML Using Double Quotes Around Strings
问题描述
在Python 3.5中,我将以下字典转储到.yaml文件中。
In Python 3.5, I have the following dictionary to be dumped into a .yaml file.
D = {'name':' mydata,值:{'x':1,'y':2,'z':3}}
当我运行时以下代码:
import ruamel
import ruamel.yaml as yaml
D={'name': 'mydata', 'value': {'x': 1, 'y': 2, 'z':3}}
yaml.round_trip_dump(D, open('my_yaml.yaml', 'w'),
default_flow_style=False, indent=4)
结果 my_yaml.yaml
如下所示:
name: mydata
value:
z: 3
x: 1
y: 2
我的问题是,有方便吗在 mydata
周围写双引号的方法,即,代替 name:mydata
,它写为 name: mydata
My question is, is there a handy way to write double quotes around mydata
, i.e., instead of name: mydata
, it is written as name: "mydata"
推荐答案
有一种相对简单的方法: / p>
There is a relatively easy way to do this:
import sys
import ruamel.yaml
S = ruamel.yaml.scalarstring.DoubleQuotedScalarString
D = {'name': S('mydata'), 'value': {'x': 1, 'y': 2, 'z':3}}
yaml = ruamel.yaml.YAML()
yaml.indent(mapping=4)
yaml.dump(D, sys.stdout)
使用YAML实例的最后三行是更新的操作方式:
that last three lines, using an instance of YAML, is the newer way of doing:
ruamel.yaml.round_trip_dump(D, sys.stdout, indent=4)
使用新的API,您可以为序列指定不同的缩进值。
Using the new API, you can give a different indent value for your sequences.
无论哪种方式,上面的代码都能为您提供:
Either way, the above gives you:
name: "mydata"
value:
x: 1
y: 2
z: 3
使用 ruamel.yaml
的往返模式时,无需显式执行 default_flow_style = False
。
There is no need to explicitly do default_flow_style=False
when using ruamel.yaml
s round-trip-mode.
DoubleQuotedScalarString
(的子类) str
是用于存储 mydata
的方法,如果您加载了首选输出,同时又保留了引号:
The DoubleQuotedScalarString
, a subclass of str
, is what is used to store "mydata"
if you load your preferred output, while preserving quotes:
yaml.preserve_quotes = True
data = yaml.load("""\
name: "mydata"
value:
x: 1
y: 2
z: 3
""")
print(type(data['name']))
给出:
<class 'ruamel.yaml.scalarstring.DoubleQuotedScalarString'>
如果输出往返正确,检查数据结构<$总是一个好主意c $ c> ruamel.yaml 加载,无论是用于双引号,块样式文字标量,十六进制整数还是注释保留。
该库在后台做了很多工作其中没有文档,图书馆的作者可能太懒了,无法提供更多内容。
If your output round-trips correctly, it is always a good idea to inspect the data structure ruamel.yaml
loads, whether it is for double quotes, block style literal scalars, hexadecimal ints or comment preservation.
The library does a lot behind the scenes for which there is no documentation, and the library's author is probably too lazy to provide more of it.
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