Python字典不返回属性

时间：2019-03-05 16:07:12

标签： python tweepy

我正在尝试从Tweepy库获取截断的tweet的属性'full_text'。我可以得到一个似乎包含该密钥的dict。但是，当我尝试has_attr检查该密钥时，或者如果我访问该密钥，则该密钥似乎不存在。如果使用PrettyPrinter，则会得到该对象的打印输出，清楚地显示了'full_text'属性在其中。我不确定为什么没有捡起它。

首先，代码：

 print("Text: " + str(tweet.text))
 if(tweet.truncated):
            print("Tweet is truncated...")
            if(hasattr(tweet, 'full_text')):
                print("And has a full text attr")
            else:
                print("No full_text attr")

            if(hasattr(tweet, '_json')):
                print("That has json in it")
                print("type: " + str(type(tweet._json)))
                print("Length: " + str(len(tweet._json)))
            else:
                print("No JSON in there, though")

            fullTweet = plex.getFullTweet(tweet)
            print("Got full tweet...")
            if(hasattr(fullTweet, "_json")):
                print("Has _json available")
                print("Type: " + str(type(tweet._json)))
                print("Length: " + str(len(tweet._json)))
                if(hasattr(fullTweet._json, "full_text")):
                    print("Has full text in there: ")
                    print(fullTweet._json['full_text'])
                else:
                   printer.pprint(fullTweet._json)
                    if(hasattr(fullTweet._json, 'full_text')):
                        print("Full text found!")
                        print(fullTweet._json['full_text'])
                    else:
                        print("Didn't get the full text from that")

这是我从一条截短的推文中获得的输出：

Text: I had a really bad experience with my psychiatrist yesterday. It’s just amazing how people in power can humiliate m… 
Tweet is truncated...
No full_text attr
That has json in it
type: <class 'dict'>
Length: 23
Got full tweet...
Has _json available
Type: <class 'dict'>
Length: 23
{   'contributors': None,
    'coordinates': None,
    'created_at': 'Tue Mar 05 14:32:29 +0000 2019',
    'display_text_range': [0, 246],
    'entities': {   'hashtags': [],
                    'symbols': [],
                    'urls': [],
                    'user_mentions': []},
    'favorite_count': 514,
    'favorited': False,
    'full_text': 'I had a really bad experience with my psychiatrist '
                 'yesterday. It’s just amazing how people in power can '
                 'humiliate manipulate demean and take advantage of their '
                 'patients. The whole time he was yelling at me I thought “I '
                 'bet he’s a trump supporter”',
    'geo': None,
    'id': 1102939945629560832,
    'id_str': '1102939945629560832',
    'in_reply_to_screen_name': None,
    'in_reply_to_status_id': None,
    'in_reply_to_status_id_str': None,
    'in_reply_to_user_id': None,
    'in_reply_to_user_id_str': None,
    'is_quote_status': False,
    'lang': 'en',
    'place': None,
    'retweet_count': 56,
    'retweeted': False,
    'source': '<a href="http://twitter.com/download/iphone" '
              'rel="nofollow">Twitter for iPhone</a>',
    'truncated': False,
    'user': {   'contributors_enabled': False,
                'created_at': 'Sun Jan 29 18:43:09 +0000 2017',
                'default_profile': False,
                'default_profile_image': False,
                'description': 'Middle Age Mama I say what People Think '
                               '\U0001f928Big on run-on sentences  I have the '
                               'most Amazing Twitter Friends sucker 4 a '
                               'compliment #TheResistance #resist #FBR',
                'entities': {   'description': {'urls': []},
                                'url': {   'urls': [   {   'display_url': 'instagram.com/maydaymindy9',
                                                           'expanded_url': 'http://instagram.com/maydaymindy9',
                                                           'indices': [0, 23],
                                                           'url': ''}]}},
                'favourites_count': 50340,
                'follow_request_sent': False,
                'followers_count': 76027,
                'following': False,
                'friends_count': 60926,
                'geo_enabled': True,
                'has_extended_profile': False,
                'id': 825776310790266883,
                'id_str': '825776310790266883',
                'is_translation_enabled': False,
                'is_translator': False,
                'lang': 'en',
                'listed_count': 144,
                'location': 'East Coast',
                'name': 'Mayday Mindy ',
                'notifications': False,
                'profile_background_color': '000000',
                'profile_background_image_url': 'http://abs.twimg.com/images/themes/theme1/bg.png',
                'profile_background_image_url_https': 'https://abs.twimg.com/images/themes/theme1/bg.png',
                'profile_background_tile': False,
                'profile_banner_url': 'https://pbs.twimg.com/profile_banners/825776310790266883/1486309186',
                'profile_image_url': 'http://pbs.twimg.com/profile_images/1091152293033058305/6Ivr9Ghh_normal.jpg',
                'profile_image_url_https': 'https://pbs.twimg.com/profile_images/1091152293033058305/6Ivr9Ghh_normal.jpg',
                'profile_link_color': 'F58EA8',
                'profile_sidebar_border_color': '000000',
                'profile_sidebar_fill_color': '000000',
                'profile_text_color': '000000',
                'profile_use_background_image': False,
                'protected': False,
                'screen_name': 'maydaymindy9',
                'statuses_count': 19555,
                'time_zone': None,
                'translator_type': 'none',
                'url': '',
                'utc_offset': None,
                'verified': False}}
Didn't get the full text from that

您可以在其中看到'full_text'属性，可以看到它是dict，而length似乎是正确的，但是尝试进行has_attr或访问._json dict中的元素的行为就好像它不存在一样。知道这里出了什么问题吗？

1 个答案:

答案 0 :(得分：0)

假设import React from "react"; import Adapter from "enzyme-adapter-react-16"; import { configure, shallow, mount } from "enzyme"; import { Demo } from "../demo"; import HOCDemo from "../demo"; configure({ adapter: new Adapter() }); const initialProps = { label: "My tooltip", classes: { root: "component-example" } }; const shallowWrapper = shallow(<Demo {...initialProps} />); const mountWrapper = mount(<Demo {...initialProps} />); const mountHOComponent = mount(<HOCDemo {...initialProps} />); describe("Demo", () => { afterAll(() => { shallowWrapper.unmount(); mountWrapper.unmount(); }); it("shallowWrap renders a tooltip with label", () => { expect(shallowWrapper.find("WithStyles(Tooltip)").props().title).toBe( initialProps.label ); }); it("mountWrap renders a tooltip with label", () => { expect(mountWrapper.find("Tooltip").props().title).toBe(initialProps.label); }); it("mountHOComponent renders a tooltip with label", () => { expect(mountHOComponent.find("Tooltip").props().title).toBe( initialProps.label ); }); }); 实际上是字典式的，则只需尝试tweet。 if 'full_text' in tweet似乎是字典键，无法像对象本身的属性一样进行访问。

这是一个简短的演示

'full_text'

重点是属性和字典键不是同一件事。这是该词典的属性：

>>> blah = {'a': 2}
>>> hasattr(blah, 'a')
False
>>> 'a' in blah
True

您会注意到它们都不是>>> dir(blah) ['__class__', '__cmp__', '__contains__', '__delattr__', '__delitem__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__setitem__', '__sizeof__', '__str__', '__subclasshook__', 'clear', 'copy', 'fromkeys', 'get', 'has_key', 'items', 'iteritems', 'iterkeys', 'itervalues', 'keys', 'pop', 'popitem', 'setdefault', 'update', 'values', 'viewitems', 'viewkeys', 'viewvalues'] 。另一方面，'a'在键列表中：

'a'

当您键入>>> blah.keys() ['a'] 时，实际上是在说if 'a' in blah。如果您想了解更多信息，请查看Python文档：Python 2和Python 3

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