小编Mor*_*len的帖子

我正在使用Python中的Shelve,我遇到了一个问题:

In [391]: x
Out[391]: {'broken': {'position': 25, 'page': 1, 'letter': 'a'}}

In [392]: x['broken'].update({'page':1,'position':25,'letter':'b'})

In [393]: x
Out[393]: {'broken': {'position': 25, 'page': 1, 'letter': 'a'}}

我不明白为什么不更新？有什么想法吗？

在控制台中运行:

$('#background-experience h4 a')

返回以下列表:

<a href='someURL.com' name='something' title='title class='class>SOME TEXT</a>

如何从列表中选择第一个元素,然后选择"SOME TEXT"？

$('#background-experience h4 a').text() 

返回所有"SOME TEXT".但

$('#background-experience h4 a')[0].text() 

打破这个错误:

$('#background-experience h4 a')[0].text()
Uncaught TypeError: string is not a function

我有一个字符串,我已使用解析转换为日期时间对象.

time = 'Tue, 30 Sep 2014 16:19:08 -0700 (PDT)'
date_object = parse(time)

我想找到从那时起已经过去的时间.我尝试使用datetime.datetime.now()和减去这两个,但它们是不同的格式,并抛出一个错误.

做这个的最好方式是什么？

我正在按照Google App Engine文档中的这些说明进行操作：

https://cloud.google.com/appengine/docs/python/config/appref

如果您搜索CORS，您将看到我要复制的示例。

我的app.yaml文件如下所示：

runtime: python27
api_version: 1
threadsafe: true

handlers:
- url: /.*
  script: main.app
  http_headers: Access-Control-Allow-Origin: *

libraries:
- name: ssl
  version: latest

但是，当我更新它时，出现此错误：

appcfg.py: error: Error parsing ./app.yaml: Unable to assign value 'Access-Control-Allow-Origin' to attribute 'http_headers':
Value 'Access-Control-Allow-Origin' for http_headers is not of the expected type HttpHeadersDict

为什么会出现此错误？我做的和文档有什么不同？

我想在运行this.setState（）之后有多个回调

此代码可以正常工作this work is printed。

savePitch(e){
        this.setState({savedPitches: [...this.state.savedPitches, this.state.addNewPitch]})
        this.setState({addNewPitch: {
            id: this.state.addNewPitch.id + 1,
            pitchName: '',
            shortCut: '',
            subject: '',
            pitch: ''
        }},
        () => {console.log('this worked')},
        )
        this.toggleNewPitchForm()
    }

但是，如果我想运行两个功能，我在下面尝试了一下，但是它没有按预期工作。

savePitch(e){
        this.setState({savedPitches: [...this.state.savedPitches, this.state.addNewPitch]})
        this.setState({addNewPitch: {
            id: this.state.addNewPitch.id + 1,
            pitchName: '',
            shortCut: '',
            subject: '',
            pitch: ''
        }},
        () => {console.log('this worked')},
        () => {console.log('then this worked')},
        )
        this.toggleNewPitchForm()
    }

我应该进行哪些更改以使其按预期运行？

代码：

def user(repo, language, page):
  # import pdb;pdb.set_trace()
  dictionary = {'language_search': language, 'page': page, 'followers': repo['followers'], 'github_repo': repo['name'],'forked?': repo['fork'], 'forks': repo['forks'], 'github_owner': repo['owner'], 'language': repo['language'], 'created_at': repo['created_at'], 'forks': repo['forks'], 'watchers': repo['watchers'], 'username': user['login'], 'type': user['type'], 'public_repos': user['public_repos'], 'followers': user['followers']}
  fields_user = ['blog', 'company', 'location', 'name']
  fields_repo = ['description']
  if user.get('email'):
    dictionary_2 = {'email': user['email']}
    for key in fields_user:
      if user.has_key(key):
        dictionary[key] = user[key]
    for key in fields_repo:
    if repo.has_key(key):
      dictionary[key] = repo[key]
    shelf[dictionary_2['email']] = dictionary
    shelf.sync()
    return dictionary_2['email']
    print dictionary_2['email'] …

这是我的字符串:

raw_list = u'Software Engineer with a huge passion for new and innovative products. Experienced gained from working in both big and fast-growing start-ups.  Specialties \u2022 Languages and Frameworks: JavaScript (Nodejs, React), Android, Ruby on Rails 4, iOS (Swift) \u2022 Databases: Mongodb, Postgresql, MySQL, Redis \u2022 Testing Frameworks: Mocha, Rspec xxxx Others: Sphinx, MemCached, Chef.'

我试图\u2022用空格替换它.

x=re.sub(r'\u2022', ' ', raw_list)

但它不起作用.我究竟做错了什么？

这是代码块:

export function ViewHeaders(props){
    console.log(props.pitches)
    return (
        props.pitchKeys.map((pitchKey, index) => {
            console.log(pitchKey)
            //prints as expected
            return (
                <div>
                    <h1> {pitchKey} </h1>
                    <ViewPitches pitches={props.pitches} key={pitchKey}/>
                </div>
            )
        })
    )
};


function ViewPitches(props) {
    console.log(props.key)
    // printing as undefined
    return(
        props.pitches.map((pitch, index) => {
            if (pitch.pitchName == props.key) {
                return (<div>{pitch.id}</div>)    
            }
        })
    )
}

我正在迭代一个列表props.pitchKeys并在内部按预期ViewHeaders打印出来pitchKey.

然后我pitchKey作为道具进入ViewPitches.

但是,当我打印出来时,props.key它会以未定义的形式返回.将.map()的返回值传递给props时,是否必须执行一些特殊操作？

我想分手 "2011 – June 2015"

var dates = "2011 – June 2015"

dates.split(" - ")

要么

dates.split("-")

正在回归 ["2011 – June 2015"]

但是,dates.split(" ")按预期工作

这个-角色有什么独特之处吗？我试图逃避它,但似乎没有什么区别.