feat(framework) Allow multiple separated run-config arguments

src/py/flwr/cli/run/run.py

@@ -18,7 +18,7 @@
 import sys
 from logging import DEBUG
 from pathlib import Path
-from typing import Any, Dict, Optional
+from typing import Any, Dict, List, Optional
 
 import typer
 from typing_extensions import Annotated
@@ -43,7 +43,7 @@ def run(
         typer.Argument(help="Name of the federation to run the app on"),
     ] = None,
     config_overrides: Annotated[
-        Optional[str],
+        Optional[List[str]],
         typer.Option(
             "--run-config",
             "-c",
@@ -113,7 +113,7 @@ def run(
 def _run_with_superexec(
     federation: Dict[str, str],
     directory: Optional[Path],
-    config_overrides: Optional[str],
+    config_overrides: Optional[List[str]],
 ) -> None:
 
     def on_channel_state_change(channel_connectivity: str) -> None:
@@ -172,7 +172,7 @@ def _run_without_superexec(
     app_path: Optional[Path],
     federation: Dict[str, Any],
     federation_name: str,
-    config_overrides: Optional[str],
+    config_overrides: Optional[List[str]],
 ) -> None:
     try:
         num_supernodes = federation["options"]["num-supernodes"]

src/py/flwr/common/config.py

@@ -130,7 +130,7 @@ def flatten_dict(raw_dict: Dict[str, Any], parent_key: str = "") -> Dict[str, st
 
 
 def parse_config_args(
-    config: Optional[str],
+    config: Optional[List[str]],
     separator: str = ",",
 ) -> Dict[str, str]:
     """Parse separator separated list of key-value pairs separated by '='."""
@@ -139,17 +139,18 @@ def parse_config_args(
     if config is None:
         return overrides
 
-    overrides_list = config.split(separator)
-    if (
-        len(overrides_list) == 1
-        and "=" not in overrides_list
-        and overrides_list[0].endswith(".toml")
-    ):
-        with Path(overrides_list[0]).open("rb") as config_file:
-            overrides = flatten_dict(tomli.load(config_file))
-    else:
-        for kv_pair in overrides_list:
-            key, value = kv_pair.split("=")
-            overrides[key] = value
+    for config_line in config:
+        overrides_list = config_line.split(separator)
+        if (
+            len(overrides_list) == 1
+            and "=" not in overrides_list
+            and overrides_list[0].endswith(".toml")
+        ):
+            with Path(overrides_list[0]).open("rb") as config_file:
+                overrides = flatten_dict(tomli.load(config_file))
+        else:
+            for kv_pair in overrides_list:
+                key, value = kv_pair.split("=")
+                overrides[key] = value
 
     return overrides

src/py/flwr/common/config_test.py

@@ -230,7 +230,12 @@ def test_parse_config_args_none() -> None:
 
 def test_parse_config_args_overrides() -> None:
     """Test parse_config_args with key-value pairs."""
-    assert parse_config_args("key1=value1,key2=value2") == {
+    assert parse_config_args(
+        ["key1=value1,key2=value2", "key3=value3", "key4=value4,key5=value5"]
+    ) == {
         "key1": "value1",
         "key2": "value2",
+        "key3": "value3",
+        "key4": "value4",
+        "key5": "value5",
     }