如何在多个Python请求参数时动态传递值列表



我是Python的新手。尝试使用Pythonrequests模块自动执行一些痛苦的API调用。非常接近,但不知道如何将时间戳列表作为request parameters传递

示例:生成lastModified时间戳列表

import datetime
from datetime import datetime, timedelta
earliest_ts_str = '2020-10-01T15:00:00Z'
earliest_ts_obj = datetime.strptime(earliest_ts_str, timestamp_format)
#bottom_ts_obj = earliest_ts_obj.replace(second=0, microsecond=0, minute=0)
latest_ts_str = '2020-10-01T23:00:00Z'
latest_ts_obj = datetime.strptime(latest_ts_str, timestamp_format)
ts_raw = []
while earliest_ts_obj < latest_ts_obj:
ts_raw.append(earliest_ts_obj)
earliest_ts_obj += timedelta(hours=1)
ts_raw.append(latest_ts_obj)
ts_formatted = [d.strftime('%Y-%m-%dT%H:%M:%SZ') for d in ts_raw]
ts_formatted

结果:

['2020-10-01T15:00:00Z',
'2020-10-01T16:00:00Z',
'2020-10-01T17:00:00Z',
'2020-10-01T18:00:00Z',
'2020-10-01T19:00:00Z',
'2020-10-01T20:00:00Z',
'2020-10-01T21:00:00Z',
'2020-10-01T22:00:00Z',
'2020-10-01T23:00:00Z']

示例2:创建request调用

  • 这里(显然(是我的问题所在。我试图充实一个函数来处理它,但它甚至还没有结束
  • 如何将列表中的第一个时间戳作为lastModifiedStart参数传递AND
  • 是否将列表中的第二个时间戳作为lastModifiedEnd参数
  • 然后依此类推,直到所有时间戳都已尝试
import requests
method = 'get'
base_url = 'https://sandbox-api.com/'
api_type = 'items'
api_version = '/v1/'
api_path = api_type + api_version
api_key = 'myKey'
full_url = base_url + api_path
def make_historic_calls(last_mod_start, last_mod_end):
last_mod_start = for ts in ts_formatted: ts
last_mod_end = for ts in ts_formatted: ts
parameters = {'api_key':api_key, 'lastModifiedStart': last_mod_start, 'lastModifiedEnd': last_mod_end}
auth_header = {'Authorization': 'Basic <base64EncodedStringHere>'}
resp_raw = requests.request(method, full_url, headers=auth_header, params=parameters)
resp_processed = json.loads(resp_raw.content)
resp_pretty = json.dumps(resp_processed, indent=2, sort_keys=True)
return print(pretty)
test = make_historic_calls(ts_formatted, ts_formatted)

我知道这不是一个容易的解决方案(我花了好几天的时间才走到这一步(,但如果能提供任何关于如何解决这一问题的指导,我将不胜感激。

谢谢

第1版:此调整后的功能非常有效!

def make_historic_calls(ts_formatted):
for last_mod_start, last_mod_end in zip(ts_formatted, ts_formatted[1:]):
parameters = {'api_key':api_key, 'lastModifiedStart': last_mod_start, 'lastModifiedEnd': last_mod_end}
auth_header = {'Authorization': 'Basic <base64EncodedString>'}
resp_raw = requests.request(method, full_url, headers=auth_header, params=parameters)
print(f'{resp_raw.url} Status Code: {str(resp_raw.status_code)}')
return print(resp_raw)
test = make_historic_calls(ts_formatted)

从列表中提取连续项目对的标准技巧是:

for this_one, next_one in zip(my_list, my_list[1:]):
...

所以你的代码需要像这样:

def make_historic_calls(ts_formatted):
for last_mod_start, last_mod_end in zip(ts_formatted, ts_formatted[1:]):
make the request using last_mod_start and last_mod_end
return some value combining all of the results from your requests

make_historic_calls(ts_formatted)

我希望我已经正确地理解了你想做什么

因此,基本上,您想要做的是通过2个元素对列表进行块化,然后解压缩这2个元素列表并将其传递给函数,考虑以下生成器:


def chunks(l, n):
"""Yield successive n-sized chunks from l."""
for i in range(0, len(l), n):
yield l[i:i + n]

然后你可以像下面这样使用它:

for first, second in chunks(iterable, 2):
make_historic_calls(first, second)

希望这能帮助

编辑:我不确定你是否想通过重叠或不重叠的对来传递变量,如果你想让它们像(0,1((1,2((2,3(一样重叠。。。而不是(0,1((2,3((4,5(。。。则使用";块";下图:

def chunks(l, n, repeat=True):
"""Yield successive n-sized chunks from l."""
for i in range(0, len(l), n):
additional = int(repeat)
yield l[i:i + n + additional]

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