dbus python如何使用本机类型获取响应?
我正在使用dbus python,需要将响应(f.e dbus.Dictionary-但通常是任何响应)作为本机python类型。是的,一个人可以编写递归转换器,但我想我一定错过了一些明显的东西?必须有一种方法可以使用dbus将这些怪物转换回Python本机类型。还是不是dbus python如何使用本机类型获取响应?,python,casting,dbus,Python,Casting,Dbus,我正在使用dbus python,需要将响应(f.e dbus.Dictionary-但通常是任何响应)作为本机python类型。是的,一个人可以编写递归转换器,但我想我一定错过了一些明显的东西?必须有一种方法可以使用dbus将这些怪物转换回Python本机类型。还是不是 dbus.Dictionary({dbus.String(u'CanGoNext'): dbus.Boolean(True, variant_level=1), dbus.String(u'CanPause'): dbus.S
dbus.Dictionary({dbus.String(u'CanGoNext'): dbus.Boolean(True, variant_level=1), dbus.String(u'CanPause'): dbus.String(u'MinimumRate'): dbus.Int32(14, variant_level=1) ...
你不需要。它们是本机类型的子类,所以您只需将它们当作本机类型使用即可:
>>> import dbus
>>> v = dbus.Dictionary({dbus.String(u'CanGoNext'): dbus.Boolean(True, variant_level=1), dbus.String(u'CanPause'): dbus.Boolean(False, variant_level=1), dbus.String(u'MinimumRate'): dbus.Int32(14, variant_level=1)})
>>> print v['MinimumRate']
14
>>> if v['CanGoNext']: print 'Go'
...
Go
>>> if v['CanPause']: print 'Pause'
...
>>>
正如@Martin Vidner所说,在代码中,您不需要做任何事情就可以使用它们 要进行漂亮的打印,可以使用现有的“递归转换器”,如
json
:
import json
print(json.dumps(d, indent=2))
输出
它释放了关于类型的信息。虽然Martin是对的,但它不适用于由python强制转换为int的布尔值(自bool以来) 不幸的是,递归转换器是保留布尔值的唯一方法 下面是一个示例实现:
import dbus
def python_to_dbus(data):
'''
convert python data types to dbus data types
'''
if isinstance(data, str):
data = dbus.String(data)
elif isinstance(data, bool):
# python bools are also ints, order is important !
data = dbus.Boolean(data)
elif isinstance(data, int):
data = dbus.Int64(data)
elif isinstance(data, float):
data = dbus.Double(data)
elif isinstance(data, list):
data = dbus.Array([python_to_dbus(value) for value in data], signature='v')
elif isinstance(data, dict):
data = dbus.Dictionary(data, signature='sv')
for key in data.keys():
data[key] = python_to_dbus(data[key])
return data
def dbus_to_python(data):
'''
convert dbus data types to python native data types
'''
if isinstance(data, dbus.String):
data = str(data)
elif isinstance(data, dbus.Boolean):
data = bool(data)
elif isinstance(data, dbus.Int64):
data = int(data)
elif isinstance(data, dbus.Double):
data = float(data)
elif isinstance(data, dbus.Array):
data = [dbus_to_python(value) for value in data]
elif isinstance(data, dbus.Dictionary):
new_data = dict()
for key in data.keys():
new_data[key] = dbus_to_python(data[key])
data = new_data
return data
为了使其更易于在处理dbus原始数据的类中使用,可以使用装饰器:
def convert_to_python(func):
def wrapper(*args, **kwargs):
return dbus_to_python(func(*args, **kwargs))
return wrapper
...
@convert_to_python
def dbus_method_call(self):
return self.dbus_proxy.Method()
这样,上述dbus_方法_调用返回的任何数据都将转换为本机python
看看这个相关的问题:这正是我需要做的(我做到了)。JSON中包含了所有表示为“dbus.String”等的子类。
import dbus
def python_to_dbus(data):
'''
convert python data types to dbus data types
'''
if isinstance(data, str):
data = dbus.String(data)
elif isinstance(data, bool):
# python bools are also ints, order is important !
data = dbus.Boolean(data)
elif isinstance(data, int):
data = dbus.Int64(data)
elif isinstance(data, float):
data = dbus.Double(data)
elif isinstance(data, list):
data = dbus.Array([python_to_dbus(value) for value in data], signature='v')
elif isinstance(data, dict):
data = dbus.Dictionary(data, signature='sv')
for key in data.keys():
data[key] = python_to_dbus(data[key])
return data
def dbus_to_python(data):
'''
convert dbus data types to python native data types
'''
if isinstance(data, dbus.String):
data = str(data)
elif isinstance(data, dbus.Boolean):
data = bool(data)
elif isinstance(data, dbus.Int64):
data = int(data)
elif isinstance(data, dbus.Double):
data = float(data)
elif isinstance(data, dbus.Array):
data = [dbus_to_python(value) for value in data]
elif isinstance(data, dbus.Dictionary):
new_data = dict()
for key in data.keys():
new_data[key] = dbus_to_python(data[key])
data = new_data
return data
def convert_to_python(func):
def wrapper(*args, **kwargs):
return dbus_to_python(func(*args, **kwargs))
return wrapper
...
@convert_to_python
def dbus_method_call(self):
return self.dbus_proxy.Method()