Use Python 3.9 compatible type hints for pydantic objects

src/jobflow_remote/config/base.py

@@ -1,11 +1,9 @@
-from __future__ import annotations
-
 import abc
 import logging
 import traceback
 from enum import Enum
 from pathlib import Path
-from typing import Annotated, Literal, Union
+from typing import Annotated, Literal, Optional, Union
 
 from jobflow import JobStore
 from pydantic import BaseModel, Extra, Field, validator
@@ -36,7 +34,7 @@ class RunnerOptions(BaseModel):
         30,
         description="Delay between subsequent advancement of the job's remote state (seconds)",
     )
-    lock_timeout: int | None = Field(
+    lock_timeout: Optional[int] = Field(
         86400,
         description="Time to consider the lock on a document expired and can be overridden (seconds)",
     )
@@ -115,16 +113,16 @@ class WorkerBase(BaseModel):
         description="Absolute path of the directory of the worker where subfolders for "
         "executing the calculation will be created"
     )
-    resources: dict | None = Field(
+    resources: Optional[dict] = Field(
         None,
         description="A dictionary defining the default resources requested to the "
         "scheduler. Used to fill in the QToolKit template",
     )
-    pre_run: str | None = Field(
+    pre_run: Optional[str] = Field(
         None,
         description="String with commands that will be executed before the execution of the Job",
     )
-    post_run: str | None = Field(
+    post_run: Optional[str] = Field(
         None,
         description="String with commands that will be executed after the execution of the Job",
     )
@@ -234,13 +232,13 @@ class RemoteWorker(WorkerBase):
     host: str = Field(description="The host to which to connect")
     user: str = Field(None, description="Login username")
     port: int = Field(None, description="Port number")
-    password: str | None = Field(None, description="Login password")
-    key_filename: str | list[str] | None = Field(
+    password: Optional[str] = Field(None, description="Login password")
+    key_filename: Optional[Union[str, list[str]]] = Field(
         None,
         description="The filename, or list of filenames, of optional private key(s) "
         "and/or certs to try for authentication",
     )
-    passphrase: str | None = Field(
+    passphrase: Optional[str] = Field(
         None, description="Passphrase used for decrypting private keys"
     )
     gateway: str = Field(
@@ -259,10 +257,10 @@ class RemoteWorker(WorkerBase):
         description="Whether to send environment variables 'inline' as prefixes in "
         "front of command strings",
     )
-    keepalive: int | None = Field(
+    keepalive: Optional[int] = Field(
         60, description="Keepalive value in seconds passed to paramiko's transport"
     )
-    shell_cmd: str | None = Field(
+    shell_cmd: Optional[str] = Field(
         "bash",
         description="The shell command used to execute the command remotely. If None "
         "the command is executed directly",
@@ -326,14 +324,16 @@ class ExecutionConfig(BaseModel):
     Configuration to be set before and after the execution of a Job.
     """
 
-    modules: list[str] | None = Field(None, description="list of modules to be loaded")
-    export: dict[str, str] | None = Field(
+    modules: Optional[list[str]] = Field(
+        None, description="list of modules to be loaded"
+    )
+    export: Optional[dict[str, str]] = Field(
         None, description="dictionary with variable to be exported"
     )
-    pre_run: str | None = Field(
+    pre_run: Optional[str] = Field(
         None, description="Other commands to be executed before the execution of a job"
     )
-    post_run: str | None = Field(
+    post_run: Optional[str] = Field(
         None, description="Commands to be executed after the execution of a job"
     )
 
@@ -347,20 +347,20 @@ class Project(BaseModel):
     """
 
     name: str = Field(description="The name of the project")
-    base_dir: str | None = Field(
+    base_dir: Optional[str] = Field(
         None,
         description="The base directory containing the project related files. Default "
         "is a folder with the project name inside the projects folder",
     )
-    tmp_dir: str | None = Field(
+    tmp_dir: Optional[str] = Field(
         None,
         description="Folder where remote files are copied. Default a 'tmp' folder in base_dir",
     )
-    log_dir: str | None = Field(
+    log_dir: Optional[str] = Field(
         None,
         description="Folder containing all the logs. Default a 'log' folder in base_dir",
     )
-    daemon_dir: str | None = Field(
+    daemon_dir: Optional[str] = Field(
         None,
         description="Folder containing daemon related files. Default to a 'daemon' "
         "folder in base_dir",
@@ -390,11 +390,11 @@ class Project(BaseModel):
         description="The JobStore used for the input. Can contain the monty "
         "serialized dictionary or the Store int the Jobflow format",
     )
-    metadata: dict | None = Field(
+    metadata: Optional[dict] = Field(
         None, description="A dictionary with metadata associated to the project"
     )
 
-    def get_jobstore(self) -> JobStore | None:
+    def get_jobstore(self) -> Optional[JobStore]:
         """
         Generate an instance of the JobStore based on the configuration