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how to fetch data from API using python

I have to get data from rest api using python. how to send headers to retrieve data from API. is there any module for requesting data from API.

Try requests it has two method get() and post()
Please try:
import requests
import json
res = requests.get('paste your link here')
response = json.loads(res.text)

Previous answers have covered the idea behind how to fetch data from an API using python. Requests library is a natural selection if you want to achieve this.
Documentation and ref: https://requests.readthedocs.io/en/master/
Installation: pip install requests or https://requests.readthedocs.io/en/master/user/install/#install
Coming to the last part - how to send headers to retrieve data from API?
You can pass headers as dictionary to the request.
url = 'https://api.github.com/some/endpoint'
headers = {'user-agent': 'my-app/0.0.1'}
response = requests.get(url, headers=headers)
Now you have the response object in response variable; now it's up to you what you want to achieve. e.g. If you want to see what is the response body as String;
print(response.text)

Yes python has requests lib to make a call to POST and GET methods
e.g.
import requests
url = 'web address'
params = {'key':'value'}
r = requests.get(url = url, params = params)
response = r.json()

Python request gives 415 error while post data

I am getting 415 error while posting data to server. This is my code how can i solve this problem. Thanks in advance!
import requests
import json
from requests.auth import HTTPBasicAuth
#headers = {'content-type':'application/javascript'}
#headers={'content-type':'application/json', 'Accept':'application/json'}
url = 'http://IPadress/kaaAdmin/rest/api/sendNotification'
data = {"name": "Value"}
r = requests.post(url, auth=HTTPBasicAuth('shany.ka', 'shanky1213'),json=data)
print(r.status_code)

According to MDN Web Docs,
The HTTP 415 Unsupported Media Type client error response code
indicates that the server refuses to accept the request because the
payload format is in an unsupported format.
The format problem might be due to the request's indicated
Content-Type or Content-Encoding, or as a result of inspecting the
data directly.
In your case, I think you've missed the headers.
Uncommenting
headers={
'Content-type':'application/json',
'Accept':'application/json'
}
and including headers in your POST request:
r = requests.post(
url,
auth=HTTPBasicAuth('shany.ka', 'shanky1213'),
json=data,
headers=headers
)
should do the trick
import requests
import json
from requests.auth import HTTPBasicAuth
headers = {
'Content-type':'application/json',
'Accept':'application/json'
}
url = 'http://IPadress/kaaAdmin/rest/api/sendNotification'
data = {"name": "Value"}
r = requests.post(
url,
auth=HTTPBasicAuth('shany.ka', 'shanky1213'),
json=data,
headers=headers
)
print(r.status_code)

As a workaround, try hitting your api using Postman. When you can successfully hit the api in postman, generate python code in postman (button is present in the top right corner). You can copy the code in your python project.

Another possible cause is using requests.post when you should be using requests.get or vice versa. I doubt that this is a common problem, but in my case a server that was happy to accept an HTTP GET for a search rejects it with a 415 when HTTP POST is used instead. (Yet another site required that a search be requested using HTTP POST. It was reusing that code that caused my problem.)

Python Requests API call not working

I'm having an issue converting a working cURL call to an internal API to a python requests call.
Here's the working cURL call:
curl -k -H 'Authorization:Token token=12345' 'https://server.domain.com/api?query=query'
I then attempted to convert that call into a working python requests script here:
#!/usr/bin/env python
import requests
url = 'https://server.domain.com/api?query=query'
headers = {'Authorization': 'Token token=12345'}
r = requests.get(url, headers=headers, verify=False)
print r
I get a HTTP 401 or 500 error depending on how I change the headers variable around. What I do not understand is how my python request is any different then the cURL request. They are both being run from the same server, as the same user.
Any help would be appreciated

Hard to say without knowing your api, but you may have a redirect that curl is honoring that requests is not (or at least isn't send the headers on redirect).
Try using a session object to ensure all requests (and redirects) have your header.
#!/usr/bin/env python
import requests
url = 'https://server.domain.com/api?query=query'
headers = {'Authorization': 'Token token=12345'}
#start a session
s = requests.Session()
#add headers to session
s.headers.update(headers)
#use session to perform a GET request.
r = s.get(url)
print r

I figured it out, it turns out I had to specify the "accept" header value, the working script looks like this:
#!/usr/bin/env python
import requests
url = 'https://server.domain.com/api?query=query'
headers = {'Accept': 'application/app.app.v2+json', 'Authorization': 'Token token=12345'}
r = requests.get(url, headers=headers, verify=False)
print r.json()

How do I set the content-type for POST requests in python-requests library?

One API I'm currently using specifies that I need a special content-type string. I don't know how do I set this in python-requests library

import requests
headers = {'Content-type': 'content_type_value'}
r = requests.get(url, headers=headers)

Posting a json data in url -- Python

I have JSON data stored in a variable in [{"totalspend": 3240.650785131, "dailybudget": 50.0}] format.
I am trying to post this JSON data to a url using:
import requests
r = requests.post("myurl", myjson)
but I am not able to see the result on my url after executing the code.

Your server most likely expects the Content-Type: application/json header to be set:
r = requests.post("myurl", data=myjson,
headers={'Content-Type': 'application/json'})
Do make sure that myjson is an actual JSON string and not a Python list.
If you are using requests version 2.4.2 or newer, you can leave the encoding of the JSON data entirely to the library; it'll set the correct Content-Type header for you automatically. You'd pass in the Python object (not a JSON string) to the json keyword argument:
r = requests.post("myurl", data=myobject)

You need to set headers first :
Try :
import json
import requests
payload = {"totalspend": 3240.650785131, "dailybudget": 50.0}
headers = {'content-type': 'application/json'}
r = requests.post(url, data=json.dumps(payload), headers=headers)