如何使用 requests.post (Python) 发送数组？“值错误：解包的值太多”
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How to send an array using requests.post (Python)? "Value Error: Too many values to unpack"
提问by Bobby Battista
I'm trying to send an array(list) of requests to the WheniWork API using requests.post, and I keep getting one of two errors. When I send the list as a list, I get an unpacking error, and when I send it as a string, I get an error asking me to submit an array. I think it has something to do with how requests handles lists. Here are the examples:
我正在尝试使用 requests.post 向 WheniWork API 发送请求数组（列表），但我不断收到两个错误之一。当我将列表作为列表发送时，我收到一个解包错误，当我将它作为一个字符串发送时，我收到一个错误，要求我提交一个数组。我认为这与请求处理列表的方式有关。以下是示例：
url='https://api.wheniwork.com/2/batch'
headers={"W-Token": "Ilovemyboss"}
data=[{'url': '/rest/shifts', 'params': {'user_id': 0,'other_stuff':'value'}, 'method':'post',{'url': '/rest/shifts', 'params': {'user_id': 1,'other_stuff':'value'}, 'method':'post'}]
r = requests.post(url, headers=headers,data=data)
print r.text
# ValueError: too many values to unpack
Simply wrapping the value for data in quotes:
只需将数据的值括在引号中：
url='https://api.wheniwork.com/2/batch'
headers={"W-Token": "Ilovemyboss"}
data="[]" #removed the data here to emphasize that the only change is the quotes
r = requests.post(url, headers=headers,data=data)
print r.text
#{"error":"Please include an array of requests to make.","code":5000}
回答by elad silver
Well, It turns out that all I needed to do was add these headers:
好吧，事实证明我需要做的就是添加这些标题：
headers = {'Content-Type': 'application/json', 'Accept':'application/json'}
and then call requests
然后调用请求
requests.post(url,data=json.dumps(payload), headers=headers)
and now i'm good!
现在我很好！
回答by Martijn Pieters
You want to pass in JSON encodeddata. See the API documentation:
您想传入JSON 编码的数据。请参阅API 文档：
Remember — All post bodies must be JSON encoded data (no form data).
请记住——所有帖子正文必须是 JSON 编码的数据（无表单数据）。
The requestslibrary makes this trivially easy:
该requests库使这变得非常简单：
headers = {"W-Token": "Ilovemyboss"}
data = [
{
'url': '/rest/shifts',
'params': {'user_id': 0, 'other_stuff': 'value'},
'method': 'post',
},
{
'url': '/rest/shifts',
'params': {'user_id': 1,'other_stuff': 'value'},
'method':'post',
},
]
requests.post(url, json=data, headers=headers)
By using the jsonkeyword argument the data is encoded to JSON for you, and the Content-Typeheader is set to application/json.
通过使用json关键字参数，数据会为您编码为 JSON，并且Content-Type标头设置为application/json.
回答by MHBN
Always remember when sending an array(list)or dictionaryin the HTTP POSTrequest, do use json argumentin the post function and set its value to your array(list)/dictionary.
始终记住在HTTP POST请求中发送数组（列表）或字典时，请在 post 函数中使用json 参数并将其值设置为您的数组（列表）/字典。
In your case it will be like:
在您的情况下，它将类似于：
r = requests.post(url, headers=headers, json=data)
r = requests.post(url, headers=headers, json=data)
Note:POST requests implicitly convert parameter's content type for body to application/json.
注意：POST 请求将 body 参数的内容类型隐式转换为 application/json。
For a quick intro read API-Integration-In-Python
回答by Michal Lis
I have a similar case but totally different solution, I've copied a snipped of code which looks like that:
我有一个类似的案例但完全不同的解决方案，我复制了一段代码，如下所示：
resp_status, resp_data = requests.post(url, headers=headers,
json=payload, verify=False)
and this resulted in error :
这导致错误：
ValueError: too many values to unpack (expected 2)
just assigning to one variable resolve the issue:
只需分配给一个变量即可解决问题：
response = requests.post(url, headers=headers,
json=payload, verify=False)
