Source code for layeredconfig.pyfile

import six
from . import ConfigSource

import inspect

[docs]class PyFile(ConfigSource): def __init__(self, pyfilename=None, **kwargs): """Loads configuration from a python source file. Any variables defined in that file will be interpreted as configuration keys. The class ``Subsection`` is automatically imported into the context when the file is executed, and represents a subsection of the configuration. Any attribute set on such an object is treated as a configuration parameter on that subsection. .. note:: The python source file is loaded and interpreted once, when creating the PyFile object. If a value is set by eg. calling a function, that function will only be called at load time, not when accessing the parameter. :param pyfile: The name of a file containing valid python code. :type pyfile: str """ super(PyFile, self).__init__(**kwargs) self.source = Subsection() if pyfilename: with open(pyfilename) as fp: pycode = compile(, pyfilename, 'exec') six.exec_(pycode, globals(), self.source) elif kwargs.get('dict'): self.source = kwargs['dict']
[docs] def has(self, key): return key in self.source and not isinstance(key, Subsection)
[docs] def get(self, key): return self.source.get(key)
[docs] def keys(self): for key, val in self.source.items(): if not (isinstance(val, Subsection) or inspect.ismodule(val) or inspect.isfunction(val) or val.__class__.__module__ in ('__future__')): yield key
[docs] def subsections(self): return [key for key in self.source.keys() if isinstance(self.source[key], Subsection)]
[docs] def subsection(self, key): # wrap this somehow? return PyFile(pyfilename=None, dict=self.source.get(key))
[docs] def set(self, key, value): # as self.writable is False, this will never be called return ValueError("Cannot set variables in a pyfile")
[docs] def typed(self, key): # if we have it, it's typed return self.has(key)
[docs]class Subsection(dict): # pass # to allow subsect.key = value syntax, but still store data in # self, not self.__dict__ def __setattr__(self, key, value): self[key] = value def __getattr__(self, key): return self[key]