下面是在.json文件中獲取的一組tweet的可視化分析代碼。解釋後，map（）函數顯示一個錯誤。任何方式來解決它？解析json文件
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)
這些都是導致對「ValueError異常」消息我收到上面的代碼行：
Traceback (most recent call last): File "tweet_len.py", line 21, in tweets['text'] = map(lambda tweet: tweet['text'], tweets_data)
File "/usr/lib/python3/dist-packages/pandas/core/frame.py", line 1887, in setitem self._set_item(key, value)
File "/usr/lib/python3/dist-packages/pandas/core/frame.py", line 1966, in _set_item
self._ensure_valid_index(value) File "/usr/lib/python3/dist-packages/pandas/core/frame.py", line 1943, in _ensure_valid_index
raise ValueError('Cannot set a frame with no defined index ' ValueError: Cannot set a frame with no defined index and a value that cannot be converted to a Series
我使用Python3。
編輯：下面是收集的twitter數據（.json格式）的示例。
{
"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"
}
你可以添加'json'文件的樣本？ – jezrael
謝謝。但是這個'json'是無效的。請檢查它[jsonlint]（http://jsonlint.com/）。 – jezrael
我已更新它。 –