我想将INI文件映射为python对象.所以如果文件有:
[UserOptions]
SampleFile = sample.txt
SamplePort = 80
SampleInt = 1
Sample = Aja
SampleDate = 10/02/2008
然后我想:
c = Configuration('sample.ini')
c.UserOptions.SamplePort = 90
我正在寻找setattr,但我得到一个递归错误.
这就是我所拥有的:
class Configuration:
def __init__ (self, fileName):
cp = SafeConfigParser()
cp.read(fileName)
self.__parser = cp
self.fileName = fileName
def __getattr__ (self, name):
if name in self.__parser.sections():
return Section(name, self.__parser)
else:
return None
def __str__ (self):
p = self.__parser
result = []
result.append('<Configuration from %s>' % self.fileName)
for s in p.sections():
result.append('[%s]' % s)
for o in p.options(s):
result.append('%s=%s' % (o, p.get(s, o)))
return '\n'.join(result)
class Section:
def __init__ (self, name, parser):
self.__name = name
self.__parser = parser
def __getattr__ (self, name):
if self.__dict__.has_key(name): # any normal attributes are handled normally
return __getattr__(self, item)
else:
return self.__parser.get(self.name, name)
def __setattr__(self, item, value):
"""Maps attributes to values.
Only if we are initialised
"""
if self.__dict__.has_key(item): # any normal attributes are handled normally
dict.__setattr__(self, item, value)
else:
self.__parser.set('UserOptions',item, value)
现在我想知道为什么在self .__ parser.set(‘UserOptions’,item,value)我得到了错误.我读了Python文档,我不知道该怎么做.我怀疑我需要存储带有字段名称的字典,然后先看一下但是如何?
解决方法:
您正在尝试根据要求获取这些部分.但是迭代部分和选项并在__init__中将它们添加为属性要容易得多.我编辑了我的例子来支持setattr.您解决了问题here您在__setattr__中分配属性,而您应该使用__dict__
from ConfigParser import SafeConfigParser
class Section:
def __init__(self, name, parser):
self.__dict__['name'] = name
self.__dict__['parser'] = parser
def __setattr__(self, attr, value):
self.__dict__[attr] = str(value)
self.parser.set(self.name, attr, str(value))
class Configuration(object):
def __init__(self, fileName):
self.__parser = SafeConfigParser()
self.__parser.read(fileName)
self.fileName = fileName
for section in self.__parser.sections():
setattr(self, section, Section(section, self.__parser))
for option in self.__parser.options(section):
setattr(getattr(self, section), option,
self.__parser.get(section, option))
def __getattr__(self, attr):
self.__parser.add_section(attr)
setattr(self, attr, Section(attr, self.__parser))
return getattr(self, attr)
def save(self):
f = open(self.fileName, 'w')
self.__parser.write(f)
f.close()
c = Configuration('config.ini')
print dir(c) -> will print all sections
print dir(c.UserOptions) -> will print all user options
print c.UserOptions.sampledate
c.new.value = 10
c.save()
标签:python,configuration-files 来源: https://codeday.me/bug/20190610/1214878.html
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