使用PyYaml将集合转储到YAML文件

时间:2010-07-13 03:07:24

标签: python ubuntu-10.04 pyyaml

我正在编写一个python应用程序。我试图使用PyYaml将我的python对象转储到yaml中。我正在使用Python 2.6并运行Ubuntu Lucid 10.04。我在Ubuntu包中使用PyYAML包:http://packages.ubuntu.com/lucid/python/python-yaml

我的对象有3个文本变量和一个对象列表。大概是这样的:

ClassToDump:

   #3 text variables
   text_variable_1
   text_variable_2
   text_variable_3
   #a list of AnotherObjectsClass instances
   list_of_another_objects = [object1,object2,object3]


AnotherObjectsClass:
   text_variable_1
   text_variable_2
   text_variable_3

我要转储的类包含AnotherObjectClass实例的列表。这个类有一些文本变量。

PyYaml以某种方式不会将集合转储到AnotherObjectClass实例中。 PyYAML会转储text_variable_1,text_variable_2和text_variable_3。

我使用以下pyYaml API来转储ClassToDump实例:

classToDump = ClassToDump();
yaml.dump(ClassToDump,yaml_file_to_dump)

是否有任何人有将对象列表转储到YAML的经验?

以下是实际的完整代码段:

def write_config(file_path,class_to_dump):    
    config_file = open(file_path,'w');  
    yaml.dump(class_to_dump,config_file);

def dump_objects():

rule = Miranda.Rule();
rule.rule_condition = Miranda.ALL
rule.rule_setting = ruleSetting
rule.rule_subjects.append(rule1)
rule.rule_subjects.append(rule2)
rule.rule_verb = ruleVerb

write_config(rule ,'./config.yaml');

这是输出:

!!蟒/对象:Miranda.Rule rule_condition:ALL rule_setting:!! python / object:Miranda.RuleSetting {confirm_action:true,description:My     配置,启用:true,递归:true,source_folder:source_folder} rule_verb:!! python / object:Miranda.RuleVerb {compression:true,dest_folder:/ home / zainul / Downloads,   类型:移动文件}

1 个答案:

答案 0 :(得分:2)

PyYaml模块为您处理细节,希望以下代码片段能够提供帮助

import sys
import yaml

class AnotherClass:
    def __init__(self):
        pass

class MyClass:
    def __init__(self):
        self.text_variable_1 = 'hello'
        self.text_variable_2 = 'world'
        self.text_variable_3 = 'foobar'
        self.list_of_another_objects = [
            AnotherClass(),
            AnotherClass(),
            AnotherClass()
        ]

obj = MyClass()
yaml.dump(obj, sys.stdout)

该代码的输出是:

!!python/object:__main__.MyClass
list_of_another_objects:
- !!python/object:__main__.AnotherClass {}
- !!python/object:__main__.AnotherClass {}
- !!python/object:__main__.AnotherClass {}
text_variable_1: hello
text_variable_2: world
text_variable_3: foobar