我最近尝试将一些灯具加载到我的数据库中.当我运行服务器并加载各种页面虽然我收到错误:
Caught DoesNotExist while rendering: ContentType matching query does not exist.
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我已经尝试运行syncdb,并单独重置每个应用程序,但没有任何运气.如何使此错误消失?
无论如何使用Facebook的Graph API获取共同朋友的列表?
我一直在玩这个工具,还没有想出办法.然而,我在Facebook的网站上看到了Simon的演示,听起来他能够得到他朋友的共同喜欢(看起来他是怎么做的太模糊了所以)所以我觉得我应该能够,但除了一些PHP脚本,我找不到任何文档.
所以我正在编写一些代码,并且最近遇到了实现一些mixin的需要.我的问题是,设计混合的正确方法是什么?我将使用下面的示例代码来说明我的确切查询.
class Projectile(Movable, Rotatable, Bounded):
'''A projectile.'''
def __init__(self, bounds, position=(0, 0), heading=0.0):
Movable.__init__(self)
Rotatable.__init__(self, heading)
Bounded.__init__(self, bounds)
self.position = Vector(position)
def update(self, dt=1.0):
'''Update the state of the object.'''
scalar = self.velocity
heading = math.radians(self.heading)
direction = Vector([math.sin(heading), math.cos(heading)])
self.position += scalar * dt * direction
Bounded.update(self)
class Bounded(object):
'''A mix-in for bounded objects.'''
def __init__(self, bounds):
self.bounds = bounds
def update(self):
if not self.bounds.contains(self.rect):
while self.rect.top > self.bounds.top:
self.rect.centery += 1
while self.rect.bottom < self.bounds.bottom:
self.rect.centery += 1 …Run Code Online (Sandbox Code Playgroud) 我正在使用Google Maps API创建可选择的社区列表,并使用Chosen使其看起来不错.我遇到的问题是Maps API没有立即获取数据 - 它通过回调函数来实现,这意味着Chosen在添加选项之前应用自身,因此选项无法运行通过选择(导致它们根本不显示).
我认为理论上,如果我可以在选择Chosen之前获取select中的元素,它应该可以工作,但我不确定如何完全这样做.有什么想法吗?
我有两个文件,foo.py和bar.py.
foo.py 包含:
import bar
class B():
a = bar.A
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bar.py 包含:
class A():
pass
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我正在docs/index.rst通过以下方式生成这些文档:
.. automodule:: bar
:members:
:undoc-members:
.. automodule:: foo
:members:
:undoc-members:
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现在,当我build html使用nit-picky flag(-n)运行时,我得到以下内容,并发出警告WARNING: py:class reference target not found: A:
(env)bash-3.2$ make html
sphinx-build -b html -d _build/doctrees -n . _build/html
Running Sphinx v1.2.3
loading pickled environment... done
building [html]: targets for 1 source files that are out of date
updating environment: 0 …Run Code Online (Sandbox Code Playgroud) 我试图从Jenkins作业以编程方式部署到Amazon Elastic Beanstalk.在我的开发机器上,这很简单:
eb deploy $(AWS_ELASTIC_BEANSTALK_ENVIRONMENT)
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在Jenkins上,它应该像将以下配置为构建命令一样简单:
virtualenv env && source env/bin/activate && pip install awsebcli
mkdir -p .elasticbeanstalk
cat << EOF > .elasticbeanstalk/config.yml
branch-defaults:
master:
environment: myenv
global:
application_name: myapp
default_ec2_keyname: null
default_platform: 64bit Amazon Linux 2014.09 v1.0.9 running Python 2.7
default_region: us-west-2
profile: eb-cli
sc: git
EOF
eb deploy myenv
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但是,这会失败,并带有以下跟踪:
[EnvInject] - Loading node environment variables.
Building remotely on standard Amazon Linux 2014.09 AMI (i-d39710df) (x) in workspace /media/ephemeral0/jenkins/workspace/My_Job
Fetching changes from the remote Git repository
Fetching …Run Code Online (Sandbox Code Playgroud) 当我尝试启动 Rails 服务器时,出现以下错误:
$ bundle exec rails s
Your Ruby version is 2.3.7, but your Gemfile specified ~> 2.3.8
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我不明白为什么会发生这种情况,因为我使用 Homebrew 和 rbenv 将 Ruby 设置为 2.3.8。2.3.7是系统的ruby版本。我使用的是 Mac 操作系统 10.14.4。
$ ruby -v
ruby 2.3.8p459 (2018-10-18 revision 65136) [x86_64-darwin18]
$ rbenv version
2.3.8 (set by /Users/ceasar/foo/.ruby-version)
$ which -a ruby
/Users/ceasar/.rbenv/shims/ruby
/usr/local/opt/ruby@2.3/bin/ruby
/usr/local/bin/ruby
/usr/bin/ruby
$ which -a bundle
/Users/ceasar/.rbenv/shims/bundle
/usr/local/bin/bundle
$ /usr/bin/xcodebuild -version
Xcode 10.2
Build version 10E125
$ brew list ruby@2.3
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/erb
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/gem
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/irb
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/rake
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/rdoc
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/ri
/usr/local/Cellar/ruby@2.3/2.3.8_1/bin/ruby
/usr/local/Cellar/ruby@2.3/2.3.8_1/include/ruby-2.3.0/ …Run Code Online (Sandbox Code Playgroud) 我有一个简单的memoizer,我用来节省昂贵的网络电话的时间.粗略地说,我的代码看起来像这样:
# mem.py
import functools
import time
def memoize(fn):
"""
Decorate a function so that it results are cached in memory.
>>> import random
>>> random.seed(0)
>>> f = lambda x: random.randint(0, 10)
>>> [f(1) for _ in range(10)]
[9, 8, 4, 2, 5, 4, 8, 3, 5, 6]
>>> [f(2) for _ in range(10)]
[9, 5, 3, 8, 6, 2, 10, 10, 8, 9]
>>> g = memoize(f)
>>> [g(1) for _ in range(10)]
[3, 3, 3, 3, 3, …Run Code Online (Sandbox Code Playgroud) 我正在尝试使用pip在我的计算机上安装Scrapy.在大多数情况下它可以工作,但在安装后不久我得到一个错误,说"无法找到vcvarsall.bat.我已经四处寻求帮助,大多数消息来源说安装Visual Express 2008.但是,甚至执行此操作后,当我导航到C:\ Program Files(x86)\ Microsoft Visual Studio 8\VC时,我没有看到vcvarsall.bat文件.有什么想法吗?
我有一个WeightedArc类定义如下:
class Arc(tuple):
@property
def tail(self):
return self[0]
@property
def head(self):
return self[1]
@property
def inverted(self):
return Arc((self.head, self.tail))
def __eq__(self, other):
return self.head == other.head and self.tail == other.tail
class WeightedArc(Arc):
def __new__(cls, arc, weight):
self.weight = weight
return super(Arc, cls).__new__(arc)
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这段代码显然不起作用,因为self没有定义WeightArc.__new__.如何将属性权重分配给WeightArc类?
python ×6
bundler ×1
content-type ×1
django ×1
facebook ×1
forms ×1
inheritance ×1
jenkins ×1
jquery ×1
mixins ×1
rbenv ×1
ruby ×1
tuples ×1
unit-testing ×1