循环访问 API 请求以记录值

Question

我正在使用一个对请求结果进行分页的 API，该 API 还方便地生成一些包含分页信息的“超媒体”值；这些值之一是'next_page'。我正在尝试创建一个接受请求的循环，记录此“next_page”值，然后使用“next_page”的值运行另一个请求，并记录下一页，依此类推，直到“next_page”的值=“无”。到目前为止，这是我的功能，但这只是填充列表中的一项，而应该有 3 项。pages = []def build_requests(request):    request = 'https://api.performancehorizon.com'+request    job = requests.get(request, headers=headers, params=params)    req = job.json()    hypermedia_np = req['hypermedia']['pagination']['next_page']    if hypermedia_np != 'None':        next_page = req['hypermedia']['pagination']['next_page']        pages.append(next_page)        job = requests.get('https://api.performancehorizon.com'+next_page, headers=headers, params=params)        req = job.json()    else: print("Done!")如何更改我的代码以循环此作业，直到“next_page”的值为“None”？

Answer 1

您可以使用以下修改后的代码

pages = []

def build_requests(request):

    request = 'https://api.performancehorizon.com' + request

    job = requests.get(request, headers=headers, params=params)

    req = job.json()

    hypermedia_np = req['hypermedia']['pagination']['next_page']

    while hypermedia_np is not None or hypermedia_np != 'None':

        next_page = req['hypermedia']['pagination']['next_page']

        if next_page is not None or next_page != 'None':

            pages.append(next_page)

            job = requests.get('https://api.performancehorizon.com' + next_page, headers=headers, params=params)

            req = job.json()

            hypermedia_np = req['hypermedia']['pagination']['next_page']

        else:

            hypermedia_np = None

    print("Done!")

或者您可以使用此简化版本，这也适用于您的情况

pages = []

def build_requests(request):

    request = 'https://api.performancehorizon.com' + request

    job = requests.get(request, headers=headers, params=params)

    req = job.json()

    hypermedia_np = req['hypermedia']['pagination']['next_page']

    while hypermedia_np is not None or hypermedia_np != 'None':

        pages.append(hypermedia_np)

        job = requests.get('https://api.performancehorizon.com' + hypermedia_np, headers=headers, params=params)

        req = job.json()

        hypermedia_np = req['hypermedia']['pagination']['next_page']

    print("Done!")