Question

我被困住了。目的是使用API来获取用户名列表。具体来说，提交数量严格大于给定阈值的用户的用户名列表。必须按用户在结果中出现的顺序返回用户名列表。

这是我的JSON：

 - page_content {'page': '1', 'per_page': 10, 'total': 15,
   'total_pages': 2, 'data': [{'id': 1, 'username': 'epaga', 'about':
   'Java developer / team leader at inetsoftware.de by day<p>iOS
   developer by
   night<p>http://www.mindscopeapp.com<p>http://inflightassistant.info<p>http://appstore.com/johngoering<p>[
   my public key: https://keybase.io/johngoering; my proof:
   https://keybase.io/johngoering/sigs/I1UIk7t3PjfB5v2GI-fhiOMvdkzn370_Z2iU5GitXa0
   ]<p>hnchat:oYwa7PJ4Yaf1Vw9Om4ju', 'submitted': 654, 'updated_at':
   '2019-08-29T13:45:12.000Z', 'submission_count': 197, 'comment_count':
   439, 'created_at': 1301039509}, {'id': 2, 'username': 'patricktomas',
   'about': '[ my public key: https://keybase.io/ptrcktms; my proof:
   https://keybase.io/ptrcktms/sigs/Z_woLEAc6ZrVtIAdZbAyp23r7vsL_clxNE3RE8DEmGQ
   ]', 'submitted': 9, 'updated_at': '2019-01-29T22:47:01.000Z',
   'submission_count': 6, 'comment_count': 3, 'created_at': 1255392958},
   {'id': 3, 'username': 'saintamh', 'about': '', 'submitted': 8,
   'updated_at': '2019-08-21T10:04:13.000Z', 'submission_count': 4,
   'comment_count': 4, 'created_at': 1267029423}, {'id': 4, 'username':
   'panny', 'about': '', 'submitted': 71, 'updated_at':
   '2019-09-06T11:13:29.000Z', 'submission_count': 51, 'comment_count':
   15, 'created_at': 1510174513}, {'id': 5, 'username': 'olalonde',
   'about':
   'olalonde@gmail.com<p>http://www.github.com/olalonde<p>CTO/Co-Founder
   @ https://binded.com', 'submitted': 4561, 'updated_at':
   '2019-09-08T09:26:52.000Z', 'submission_count': 1032,
   'comment_count': 3045, 'created_at': 1261051630}, {'id': 6,
   'username': 'WisNorCan', 'about': 'bayesian optimist', 'submitted':
   177, 'updated_at': '2019-07-26T01:40:10.000Z', 'submission_count':
   42, 'comment_count': 107, 'created_at': 1497196382}, {'id': 7,
   'username': 'dmmalam', 'about': 'Cofounder OctaveWealth (YCS12)',
   'submitted': 765, 'updated_at': '2019-08-12T21:38:21.000Z',
   'submission_count': 645, 'comment_count': 115, 'created_at':
   1312041112}, {'id': 8, 'username': 'replicatorblog', 'about':
   'https://twitter.com/josephflaherty<p>Formerly
   Wired:<p>https://www.wired.com/author/joseph-flaherty/<p>Now covering
   startups for Founder Collective, a fantastic VC
   firm:<p>http://www.foundercollective.com/', 'submitted': 1441,
   'updated_at': '2019-09-06T02:06:35.000Z', 'submission_count': 550,
   'comment_count': 790, 'created_at': 1224455310}, {'id': 9,
   'username': 'eightturn', 'about': 'twitter: @searchbound',
   'submitted': 84, 'updated_at': '2019-08-10T21:33:15.000Z',
   'submission_count': 7, 'comment_count': 75, 'created_at':
   1405978844}, {'id': 10, 'username': 'vladikoff', 'about': '[ my
   public key: https://keybase.io/vladikoff; my proof:
   https://keybase.io/vladikoff/sigs/jxMsGDORM-qiAf0bQy91Uw4RYpHNeQa1bZD3WFdIZWo
   ]', 'submitted': 65, 'updated_at': '2019-05-10T22:04:36.000Z',
   'submission_count': 15, 'comment_count': 50, 'created_at':
   1298054029}]} type(page_content) <class 'dict'>
       page_content {'page': '2', 'per_page': 10, 'total': 15, 'total_pages': 2, 'data': [{'id': 11, 'username': 'mpweiher',
   'about':
   'http://blog.metaobject.com/<p>http://www.metaobject.com/<p>http://objective.st/',
   'submitted': 5967, 'updated_at': '2019-09-07T19:35:03.000Z',
   'submission_count': 3342, 'comment_count': 2577, 'created_at':
   1333104319}, {'id': 12, 'username': 'coloneltcb', 'about': 'I work at
   Twilio, with Jol Franusic. Comments are my own.<p>[ my public key:
   https://keybase.io/selviano; my proof:
   https://keybase.io/selviano/sigs/fxZxeSakx-aPR2d0iICZU9FpHnDqPDW0Kz4s9OkrGS0
   ]', 'submitted': 2249, 'updated_at': '2019-08-31T20:31:24.000Z',
   'submission_count': 2137, 'comment_count': 88, 'created_at':
   1205248131}, {'id': 13, 'username': 'guelo', 'about': '',
   'submitted': 4996, 'updated_at': '2019-09-07T13:09:59.000Z',
   'submission_count': 72, 'comment_count': 4595, 'created_at':
   1247879051}, {'id': 14, 'username': 'frederfred', 'about': 'web
   developer', 'submitted': 4, 'updated_at': '2018-03-22T13:44:20.000Z',
   'submission_count': 3, 'comment_count': 1, 'created_at': 1361951997},
   {'id': 15, 'username': 'pkiller', 'about': '', 'submitted': 32,
   'updated_at': '2019-04-07T21:56:40.000Z', 'submission_count': 1,
   'comment_count': 31, 'created_at': 1539079554}]} type(page_content)
   <class 'dict'>

我的代码：

import json
import requests
def getUsernames(threshold):
    username = []  
    data = requests.get("https://jsonmock.hackerrank.com/api/article_users/search?page={}")  
    response = json.loads(data.content.decode('utf-8'))    
    for page in range(0, response["total_pages"]):       
        page_response = requests.get("https://jsonmock.hackerrank.com/api/article_users/search?page={}".format(page + 1))    
        page_content = json.loads(page_response.content.decode('utf-8'))
        print ('page_content', page_content, 'type(page_content)', type(page_content))
        for item in range(0, len(page_content["data"])):
             username.append(str(page_content["data"][item]["username"]))
    return "\n".join(username)

print(getUsernames(10))

请帮助-@-@-

Answer 1

效率低下-您所做的第一个请求基本上是在您检查total_pages时就丢弃了。要遍历不需要range()的数据，请使用for循环，这样更容易：

def getUsernames(threshold):
    username = []
    page = 1
    while True:
        data = requests.get("https://jsonmock.hackerrank.com/api/article_users/search?page={}".format(page))
        page_content = json.loads(data.content.decode('utf-8'))
        # iterate through `data`
        for item in page_content["data"]:
            username.append(item["username"])
        
        # if we have enough usernames to hit threshold, quit
        if len(username) >= threshold:
            break
        
        # if we are on the last page, quit
        if page >= page_content['total_pages']:
            break
        
        # increase page and repeat the loop
        page += 1

    return "\n".join(username)

Answer 2

尝试一下

for user in page_content['data']:
    if user['submission_count'] > threshold:
        username.append(user['username'])

Answer 3

我刚刚尝试了您的代码，这似乎是正确的。只需获取usernames of users with submission count strictly greater than the given threshold，就需要设置条件。下面的代码应该可以工作：

import json
import requests


def getUsernames(threshold):
    username = []
    data = requests.get("https://jsonmock.hackerrank.com/api/article_users/search?page={}")
    response = json.loads(data.content.decode('utf-8'))
    for page in range(0, response["total_pages"]):
        page_response = requests.get("https://jsonmock.hackerrank.com/api/article_users/search?page={}".format(page + 1))
        page_content = json.loads(page_response.content.decode('utf-8'))
        # print ('page_content', page_content, 'type(page_content)', type(page_content))
        for item in range(0, len(page_content["data"])):
            if page_content["data"][item]['submission_count'] > threshold: # You missed this condition
                username.append(str(page_content["data"][item]["username"]))
    return "\n".join(username)


print(getUsernames(10))

输出：

epaga
panny
olalonde
WisNorCan
dmmalam
replicatorblog
vladikoff
mpweiher
coloneltcb
guelo

尝试从JSON中提取必填字段。（蟒蛇）

3 个答案:

尝试从JSON中提取必填字段。 （蟒蛇）

3 个答案:

尝试从JSON中提取必填字段。（蟒蛇）