Question

我正在尝试使用我的python代码中的pyyaml从textfile中创建一个对象。我有以下文件：

主要方法：

from make_conf import make_conf
c = make_conf().config
print(c.c)

我要创建代码的对象：

from config import config
import yaml
class make_conf():
def __init__(self):
    filename = 'configs.txt'
    input_file = open(filename, 'r')
    input_string = input_file.read()
    self.config = yaml.load(input_string)

我想要创建的对象：

class config():
def __init__(self):
    self.c = 4

我想通过pyyaml读取的文本文件：

!!python/object:__main__.config
c: 4

我收到以下错误消息：

/usr/bin/python3.5 "/home/jakob/00 Link to Faubox/spielwiesen/python       /main.py"
Traceback (most recent call last):
  File "/home/jakob/00 Link to Faubox/spielwiesen/python/main.py", line 4, in <module>
    c = make_conf().config
  File "/home/jakob/FAUbox/Faubox/spielwiesen/python/make_conf.py", line 11, in __init__
    a = yaml.load(input_string)
  File "/usr/local/lib/python3.5/dist-packages/yaml/__init__.py", line 72, in load
    return loader.get_single_data()
  File "/usr/local/lib/python3.5/dist-packages/yaml/constructor.py", line 37, in get_single_data
    return self.construct_document(node)
  File "/usr/local/lib/python3.5/dist-packages/yaml/constructor.py", line 41, in construct_document
data = self.construct_object(node)
  File "/usr/local/lib/python3.5/dist-packages/yaml/constructor.py", line 91, in construct_object
data = next(generator)
  File "/usr/local/lib/python3.5/dist-packages/yaml/constructor.py", line 575, in construct_python_object
instance = self.make_python_instance(suffix, node, newobj=True)
  File "/usr/local/lib/python3.5/dist-packages/yaml/constructor.py", line 552, in make_python_instance
cls = self.find_python_name(suffix, node.start_mark)
  File "/usr/local/lib/python3.5/dist-packages/yaml/constructor.py", line 529, in find_python_name
% (object_name, module.__name__), mark)
yaml.constructor.ConstructorError: while constructing a Python object
cannot find 'config' in the module '__main__'
  in "<unicode string>", line 1, column 1:
!!python/object:__main__.config


^

如果我在main方法中创建对象，它会以某种方式工作。为什么？我想在main方法之外创建对象！

Answer 1

找到解决方案：

您必须编写如下文本文件：

!!python/object:config.config c: 4

第一个配置代表模块名称（文件名，配置类所在的位置），第二个配置是类的名称。这个修改yaml知道它要创建哪个对象。

如何使用主方法外部的Pyyaml从文本文件创建对象

1 个答案: