Fetch a file from a local url with Python requests?

As @WooParadog explained requests library doesn’t know how to handle local files. Although, current version allows to define transport adapters.

Therefore you can simply define you own adapter which will be able to handle local files, e.g.:

from requests_testadapter import Resp
import os

class LocalFileAdapter(requests.adapters.HTTPAdapter):
    def build_response_from_file(self, request):
        file_path = request.url[7:]
        with open(file_path, 'rb') as file:
            buff = bytearray(os.path.getsize(file_path))
            file.readinto(buff)
            resp = Resp(buff)
            r = self.build_response(request, resp)

            return r

    def send(self, request, stream=False, timeout=None,
             verify=True, cert=None, proxies=None):

        return self.build_response_from_file(request)

requests_session = requests.session()
requests_session.mount('file://', LocalFileAdapter())
requests_session.get('file://<some_local_path>')

I’m using requests-testadapter module in the above example.