Use fstrings for server code

server/src/api/v1.py

@@ -64,7 +64,7 @@ def get_version():
         version = pkg_resources.get_distribution("testflinger").version
     except pkg_resources.DistributionNotFound:
         version = "devel"
-    return "Testflinger Server v{}".format(version)
+    return f"Testflinger Server v{version}"
 
 
 @v1.post("/job")
@@ -699,7 +699,7 @@ def job_position_get(job_id):
     try:
         queue = job_data.json.get("job_queue")
     except (AttributeError, TypeError):
-        return "Invalid json returned for id: {}\n".format(job_id), 400
+        return f"Invalid json returned for id: {job_id}\n", 400
     # Get all jobs with job_queue=queue and return only the _id
     jobs = database.mongo.db.jobs.find(
         {"job_data.job_queue": queue, "result_data.job_state": "waiting"},

server/src/application.py

@@ -70,7 +70,7 @@ def create_flask_app(config=None):
     @tf_app.errorhandler(NotFound)
     def handle_404(exc):
         tf_log.error("[404] Not found: %s", request.url)
-        return "Not found: {}\n".format(exc), 404
+        return f"Not found: {exc}\n", 404
 
     @tf_app.errorhandler(ConnectionFailure)
     def handle_timeout(exc):
@@ -80,7 +80,7 @@ def handle_timeout(exc):
     @tf_app.errorhandler(Exception)
     def unhandled_exception(exc):
         tf_log.exception("Unhandled Exception: %s", (exc))
-        return "Unhandled Exception: {}\n".format(exc), 500
+        return f"Unhandled Exception: {exc}\n", 500
 
     tf_app.register_blueprint(views)
     tf_app.register_blueprint(v1, url_prefix="/v1")

server/tests/test_v1.py

@@ -160,7 +160,7 @@ def test_initial_job_state(mongo_app):
     # Place a job on the queue
     output = app.post("/v1/job", json=job_data)
     job_id = output.json.get("job_id")
-    result_url = "/v1/result/{}".format(job_id)
+    result_url = f"/v1/result/{job_id}"
     response = app.get(result_url)
     assert "waiting" == response.json.get("job_state")
 
@@ -175,7 +175,7 @@ def test_resubmit_job_state(mongo_app):
     job_id = output.json.get("job_id")
     job_data["job_id"] = job_id
     output = app.post("/v1/job", json=job_data)
-    result_url = "/v1/result/{}".format(job_id)
+    result_url = f"/v1/result/{job_id}"
     updated_data = app.get(result_url).json
     assert "waiting" == updated_data.get("job_state")
 
@@ -345,7 +345,7 @@ def test_job_get_id_with_data(mongo_app):
     # Place a job on the queue
     output = app.post("/v1/job", json=job_data)
     job_id = output.json.get("job_id")
-    job_url = "/v1/job/{}".format(job_id)
+    job_url = f"/v1/job/{job_id}"
     # Request the original json for the job
     app.get(job_url)
     output = app.get(job_url)
@@ -365,7 +365,7 @@ def test_job_position(mongo_app):
     for pos in range(3):
         output = app.post("/v1/job", json=job_data)
         job_id.append(output.json.get("job_id"))
-        output = app.get("/v1/job/{}/position".format(job_id[pos]))
+        output = app.get(f"/v1/job/{job_id[pos]}/position")
         # Initial position should increment for each job as we add them
         assert output.text == str(pos)
 
@@ -374,11 +374,11 @@ def test_job_position(mongo_app):
     # The job we get should be the first one that was added
     assert output.json.get("job_id") == job_id[0]
     # The position of the remaining jobs should decrement
-    assert app.get("/v1/job/{}/position".format(job_id[2])).text == "1"
+    assert app.get(f"/v1/job/{job_id[2]}/position").text == "1"
     # Cancel the next job in the queue
     output = app.post(f"/v1/job/{job_id[1]}/action", json={"action": "cancel"})
     # The position of the remaining job should decrement again
-    assert app.get("/v1/job/{}/position".format(job_id[2])).text == "0"
+    assert app.get(f"/v1/job/{job_id[2]}/position").text == "0"
 
 
 def test_action_post(mongo_app):