是顯示我正在處理的API的繼承的兩個類。所以我希望基類ServiceTemplateTest爲所有服務和擁有一組共同的屬性,使其表現得像OrderedDict對象一樣。所以基類從OrderedDict入手。然後,我在__init__
中執行super()
以清除MRO問題。現在當我真正使用這個基類時,當我嘗試從基類中分類__init()
時,我遇到了問題。根據我的調試器,它說我需要調用:self._ServiceTemplateTest__init()
,但是不應該因爲我調用super()而只是__init()
?什麼是正確的方式讓我繼承而不必進行此調用:self._ServiceTemplateTest__init()
?使用super()(Python)時的繼承問題
我是否需要在非基類上創建一個__init__()
,我有多個super()調用?如果是這樣,什麼超級班應該先來?
感謝您提供任何建議!
from collections import OrderedDict
import urllib2, json, urllib
class ServiceTemplateTest(OrderedDict):
_con = None
_url = None
def __init__(self, url, connection=None, initialize=False, **kwargs):
super(ServiceTemplateTest, self).__init__()
self._url = url
self._con = connection
if initialize:
self.__init(connection)
def __init(self, connection=None):
if connection is None:
connection = self._con
attributes = [attr for attr in dir(self)
if not attr.startswith('__') and \
not attr.startswith('_')]
params = {"f":"json"}
params = urllib.urlencode(params)
result = json.loads(
urllib2.urlopen(url="{url}?{params}".format(url=self._url,
params=params)).read())
for k,v in result.items():
if k in attributes:
setattr(self, "_"+ k, v)
self[k] = v
else:
self[k] = v
self.__dict__.update(result)
#----------------------------------------------------------------------
@property
def connection(self):
return self._con
#----------------------------------------------------------------------
@connection.setter
def connection(self, value):
self._con = value
self.refresh()
#----------------------------------------------------------------------
@property
def url(self):
return self._url
#----------------------------------------------------------------------
@url.setter
def url(self, value):
""""""
self._url = value
self.refresh()
#----------------------------------------------------------------------
def __str__(self):
return json.dumps(self)
#----------------------------------------------------------------------
def __repr__(self):
return self.__str__()
#----------------------------------------------------------------------
def refresh(self):
self.__init()
class SchematicService(ServiceTemplateTest):
"""schematic service"""
_con = None
_json_dict = None
_json = None
_url = None
_nbSchematicLayers = None
_nbTemplates = None
_type = None
_name = None
_nbEstimatedDiagrams = None
def __init__(self, url, connection=None, initialize=False, **kwargs):
super(SchematicService, self).__init__(url=url, connection=connection,
initialize=initialize, **kwargs)
self._url = url
self._con = connection
if initialize:
self.__init(connection)
#----------------------------------------------------------------------
@property
def nbSchematicLayers(self):
if self._nbSchematicLayers is None:
self.__init()
return self._nbSchematicLayers
#----------------------------------------------------------------------
@property
def nbTemplates (self):
if self._nbTemplates is None:
self.__init()
return self._nbTemplates
#----------------------------------------------------------------------
@property
def type(self):
if self._type is None:
self.__init()
return self._type
#----------------------------------------------------------------------
@property
def name(self):
if self._name is None:
self.__init()
return self._name
#----------------------------------------------------------------------
@property
def nbEstimatedDiagrams(self):
if self._nbEstimatedDiagrams is None:
self.__init()
return self._nbEstimatedDiagrams
@property
def somerandompropertytest(self):
return "hi"
if __name__ == "__main__":
url = "http://servicesbeta6.esri.com/arcgis/rest/services/S1_Schematics/MapServer"
s = SchematicService(url=url, initialize=True)
print s
謝謝,這是非常有幫助的。我總是學到新東西! –
通過更改名稱,像魅力一樣工作。欣賞它。 –