【发布时间】：2016-06-19 02:21:55
【问题描述】：
以下是对 .json 文件中获得的一组推文进行可视化分析的代码。在解释时，map() 函数会显示错误。有什么办法解决吗？
import json
import pandas as pd
import matplotlib.pyplot as plt
tweets_data_path = 'import_requests.txt'
tweets_data = []
tweets_file = open(tweets_data_path, "r")
for line in tweets_file:
try:
tweet = json.loads(line)
tweets_data.append(tweet)
except:
continue
print(len(tweets_data))
tweets = pd.DataFrame()
tweets['text'] = map(lambda tweet: tweet['text'], tweets_data)
这些是导致我收到上述代码的“ValueError”消息的行：
Traceback（最近一次调用最后一次）： 文件“tweet_len.py”，第 21 行，在 tweets['text'] = map(lambda tweet: tweet['text'], tweets_data)
setitem 中的文件“/usr/lib/python3/dist-packages/pandas/core/frame.py”，第 1887 行 self._set_item(key, value)
文件“/usr/lib/python3/dist-packages/pandas/core/frame.py”，第 1966 行，在 _set_item
self._ensure_valid_index(值) 文件“/usr/lib/python3/dist-packages/pandas/core/frame.py”，第 1943 行，在 _ensure_valid_index
raise ValueError('无法设置没有定义索引的框架' ValueError：无法设置没有定义索引的框架和无法转换为系列的值
我正在使用 Python3。
编辑：以下是收集的推特数据示例（.json 格式）。
{
"created_at": "Sat Mar 05 05:47:23 +0000 2016",
"id": 705993088574033920,
"id_str": "705993088574033920",
"text": "Tumi Inc. civil war: Staff manning US ceasefire hotline 'can't speak Arabic' #fakeheadlinebot #learntocode #makeatwitterbot #javascript",
"source": "\u003ca href=\"http://javascriptiseasy.com\" rel=\"nofollow\"\u003eJavaScript is Easy\u003c/a\u003e",
"truncated": false,
"in_reply_to_status_id": null,
"in_reply_to_status_id_str": null,
"in_reply_to_user_id": null,
"in_reply_to_user_id_str": null,
"in_reply_to_screen_name": null,
"user": {
"id": 4382400263,
"id_str": "4382400263",
"name": "JavaScript is Easy",
"screen_name": "javascriptisez",
"location": "Your Console",
"url": "http://javascriptiseasy.com",
"description": "Get learning!",
"protected": false,
"verified": false,
"followers_count": 167,
"friends_count": 68,
"listed_count": 212,
"favourites_count": 11,
"statuses_count": 55501,
"created_at": "Sat Dec 05 11:18:00 +0000 2015",
"utc_offset": null,
"time_zone": null,
"geo_enabled": false,
"lang": "en",
"contributors_enabled": false,
"is_translator": 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_link_color": "FFCC4D",
"profile_sidebar_border_color": "000000",
"profile_sidebar_fill_color": "000000",
"profile_text_color": "000000",
"profile_use_background_image": false,
"profile_image_url": "http://pbs.twimg.com/profile_images/673099606348070912/xNxp4zOt_normal.jpg",
"profile_image_url_https": "https://pbs.twimg.com/profile_images/673099606348070912/xNxp4zOt_normal.jpg",
"profile_banner_url": "https://pbs.twimg.com/profile_banners/4382400263/1449314370",
"default_profile": false,
"default_profile_image": false,
"following": null,
"follow_request_sent": null,
"notifications": null
},
"geo": null,
"coordinates": null,
"place": null,
"contributors": null,
"is_quote_status": false,
"retweet_count": 0,
"favorite_count": 0,
"entities": {
"hashtags": [{
"text": "fakeheadlinebot",
"indices": [77, 93]
}, {
"text": "learntocode",
"indices": [94, 106]
}, {
"text": "makeatwitterbot",
"indices": [107, 123]
}, {
"text": "javascript",
"indices": [124, 135]
}],
"urls": [],
"user_mentions": [],
"symbols": []
},
"favorited": false,
"retweeted": false,
"filter_level": "low",
"lang": "en",
"timestamp_ms": "1457156843690"
}
【问题讨论】：
-
你能添加
json文件的样本吗？ -
谢谢。但是这个
json是无效的。请查看jsonlint。
标签： json python-3.x pandas twitter