Querystring Array Parameters in Python using Requests

What u are doing is correct only. The resultant url is same what u are expecting.

>>> payload = {'name': 'hello', 'data': 'hello'}
>>> r = requests.get("http://example.com/api/params", params=payload)

u can see the resultant url:

>>> print(r.url)
http://example.com/api/params?name=hello&data=hello

According to url format:

In particular, encoding the query string uses the following rules:

• Letters (A–Z and a–z), numbers (0–9) and the characters .,-,~ and _ are left as-is
• SPACE is encoded as + or %20
• All other characters are encoded as %HH hex representation with any non-ASCII characters first encoded as UTF-8 (or other specified encoding)

So array[] will not be as expected and will be automatically replaced according to the rules:

If you build a url like :

`Build URL: http://example.com/api/add.json?name='hello'&data[]='hello'&data[]='world'`

OutPut will be:

>>> payload = {'name': 'hello', "data[]": 'hello','data[]':'world'}
>>> r = requests.get("http://example.com/api/params", params=payload)
>>> r.url
u'http://example.com/api/params?data%5B%5D=world&name=hello'

This is because Duplication will be replaced by the last value of the key in url and data[] will be replaced by data%5B%5D.

If data%5B%5D is not the problem(If server is able to parse it correctly),then u can go ahead with it.

Source Link

All you need to do is putting it on a list and making the key as list like string:

data = {'name': 'hello', 'data[]': ['hello', 'world']}
response = requests.get('http://example.com/api/add.json', params=data)

One solution if using the requests module is not compulsory, is using the urllib/urllib2 combination:

payload = [('name', 'hello'), ('data[]', ('hello', 'world'))]
params = urllib.urlencode(payload, doseq=True)
sampleRequest = urllib2.Request('http://example.com/api/add.json?' + params)
response = urllib2.urlopen(sampleRequest)

Its a little more verbose and uses the doseq(uence) trick to encode the url parameters but I had used it when I did not know about the requests module.

For the requests module the answer provided by @Tomer should work.