遍历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还可以方便地生成一些包含分页信息的“hypermedia”值；其中一个值是“next_page”。

我正在尝试创建一个循环，该循环接受一个请求，记录这个'next_page‘值，然后使用' next _ page’值运行另一个请求，并记录下一个页面，依此类推，直到'next_page‘值= 'None’为止。

到目前为止，这是我的函数，但它只填充了列表中的一项，而实际上应该有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!")

或者你可以使用这个简化的版本，这应该也适用于你的情况

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!")