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descriptors.py
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descriptors.py
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from datetime import datetime
class Descriptor(object):
def __init__(self, attribute):
"""
Create a new descriptor.
:param attribute: A string describing the name of the attribute in Facebook's Graph API.
"""
self.attribute = attribute
def __get__(self, instance, owner):
return instance.cache[self.attribute]
class String(Descriptor):
def __get__(self, instance, owner):
return str(super(String, self).__get__(instance, owner))
class Integer(Descriptor):
def __get__(self, instance, owner):
return int(super(Integer, self).__get__(instance, owner))
class Boolean(Descriptor):
def __get__(self, instance, owner):
return bool(super(Boolean, self).__get__(instance, owner))
class Date(Descriptor):
def __init__(self, attribute, format):
"""
Create a new descriptor.
:param attribute: A string describing the name of the attribute in Facebook's Graph API.
:param format: A strptime-compatible string describing the format of the date.
"""
self.attribute = attribute
self.format = format
def __get__(self, instance, owner):
return datetime.strptime(super(Date, self).__get__(instance, owner), self.format)
class List(Descriptor):
def __init__(self, attribute, cls):
"""
Create a new descriptor.
:param attribute: A string describing the name of the attribute in Facebook's Graph API.
:param cls: A type describing the class that the list will consist of.
"""
self.attribute = attribute
self.cls = cls
def __get__(self, instance, owner):
items = []
for item in super(List, self).__get__(instance, owner):
instance = self.cls(
id = item.get('id', None),
oauth_token = instance.oauth_token
)
items.append(instance)
return items
class Entity(Descriptor):
def __init__(self, attribute, cls):
"""
Create a new descriptor.
:param attribute: A string describing the name of the attribute in Facebook's Graph API.
:param cls: A type describing the class that the entity will be initialized from.
"""
self.attribute = attribute
self.cls = cls
def __get__(self, instance, owner):
data = super(Page, self).__get__(instance, owner)
instance = self.cls(
id = data['id'],
oauth_token = instance.oauth_token
)
return instance