Requests in Asyncio - Keyword Arguments

Question

I'm using asyncio with the requests module to make an asynchronous HTTP request. I can make a GET request like this: ``` @asyncio.coroutine def do_checks(): loop = asyncio.get_event_loop() req = loop.run_in_executor(None, requests.get, 'https://api.github.com/user') resp = yield from req print(resp.status_code) loop = asyncio.get_event_loop() loop.run_until_complete(do_checks()) ``` However, I need to do support Basic HTTP Auth (described here) in the request. According to the documentation, url and auth are both named parameters for requests.get(). But, if I run this (note the addition of url='' and auth = ''): ``` @asyncio.coroutine def do_checks(): loop = asyncio.get_event_loop() req = loop.run_in_executor(None, requests.get, url='https://api.github.com/user', auth=HTTPBasicAuth('user', 'pass')) resp = yield from req print(resp.status_code) loop = asyncio.get_event_loop() loop.run_until_complete(do_checks()) ``` I get this error: ``` TypeError: run_in_executor() got an unexpected k…

Accepted Answer

Two ways to do that. Create a wrapper function, or just use a session to provide the auth.

Using a session:

```
@asyncio.coroutine
def do_checks():
    loop = asyncio.get_event_loop()
    session = requests.Session()
    session.auth = HTTPBasicAuth('user', 'pass')
    req = loop.run_in_executor(None, session.get, 'https://api.github.com/user')
    resp = yield from req
    print(resp.status_code)
```

Writing a wrapper function (note that I'm using `def` for clarity here, but that a `lambda` would obviously work too):

```
@asyncio.coroutine
def do_checks():
    def do_req():
        return requests.get('https://api.github.com/user', auth=HTTPBasicAuth('user', 'pass'))
    loop = asyncio.get_event_loop()
    req = loop.run_in_executor(None, do_req)
    resp = yield from req
    print(resp.status_code)
```

Requests in Asyncio - Keyword Arguments

Solution

Problem