compatibility with python 3.14 (#2647)

fixes #2640

Author: mt-ob

.github/workflows/test-stubs.yml

@@ -18,8 +18,10 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-22.04]
-        ver: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        ver: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
         include:
+          - os: macos-latest
+            ver: "3.14"
           - os: macos-latest
             ver: "3.13"
           - os: macos-latest

.github/workflows/test.yml

@@ -25,8 +25,10 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-22.04]
-        ver: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        ver: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
         include:
+          - os: macos-latest
+            ver: "3.14"
           - os: macos-latest
             ver: "3.13"
           - os: macos-latest

metaflow/graph.py

@@ -94,7 +94,7 @@ def _parse_switch_dict(self, dict_node):
                 case_key = None
 
                 # handle string literals
-                if isinstance(key, ast.Str):
+                if hasattr(ast, "Str") and isinstance(key, ast.Str):
                     case_key = key.s
                 elif isinstance(key, ast.Constant):
                     case_key = key.value
@@ -171,7 +171,7 @@ def _parse(self, func_ast, lineno):
                 # Get condition parameter
                 for keyword in tail.value.keywords:
                     if keyword.arg == "condition":
-                        if isinstance(keyword.value, ast.Str):
+                        if hasattr(ast, "Str") and isinstance(keyword.value, ast.Str):
                             condition_name = keyword.value.s
                         elif isinstance(keyword.value, ast.Constant) and isinstance(
                             keyword.value.value, str

metaflow/runner/click_api.py

@@ -351,8 +351,10 @@ def getattr_wrapper(_self, name):
         class_dict = {
             "__module__": "metaflow",
             "_API_NAME": flow_file,
-            "_internal_getattr": functools.partial(
-                _lazy_load_command, cli_collection, "_compute_flow_parameters"
+            "_internal_getattr": staticmethod(
+                functools.partial(
+                    _lazy_load_command, cli_collection, "_compute_flow_parameters"
+                )
             ),
             "__getattr__": getattr_wrapper,
         }