from csp.constants import SELF
from csp.middleware import CSPMiddleware
...
class AdminCSPMiddleware(CSPMiddleware):
    """
    django-csp middleware that allows same-origin scripts on admin paths.
    """

    def get_policy_parts(self, request, response, report_only=False):
        policy_parts = super().get_policy_parts(request, response, report_only=report_only)
        if not report_only and request.path_info.startswith("/admin/"):
            policy_parts.update = {"script-src": [SELF]}
        return policy_parts