Remove pydantic dependency

CHANGES.rst

@@ -3,6 +3,10 @@
 Changelog
 ---------
 
+0.11.1 (unreleased)
+...................
+* Remove ``pydantic`` dependency
+
 0.11.0 (2022-08-03)
 ...................
 * Added ability to optionally pass ``ctx`` to the task, like this:

darq/cli.py

@@ -6,11 +6,11 @@
 from signal import Signals
 
 import click
-from pydantic.utils import import_string
 
 from .app import Darq
 from .logs import default_log_config
 from .scheduler import run_scheduler
+from .utils import import_string
 from .version import __version__
 from .worker import check_health
 from .worker import create_worker

darq/cron.py

@@ -4,11 +4,10 @@
 from datetime import datetime
 from datetime import timedelta
 
-from pydantic.utils import import_string
-
 from .types import CoroutineType
 from .types import DarqTask
 from .utils import get_function_name
+from .utils import import_string
 from .utils import SecondsTimedelta
 from .utils import to_seconds
 

darq/utils.py

@@ -20,6 +20,29 @@
 SecondsTimedelta = Union[int, float, timedelta]
 
 
+def import_string(dotted_path: str) -> Any:
+    """
+    Stolen approximately from Django. Import a dotted module path and return
+    the attribute/class designated by the last name in the path.
+    Raise ImportError if the import fails.
+    """
+    from importlib import import_module
+
+    try:
+        module_path, class_name = dotted_path.strip(' ').rsplit('.', 1)
+    except ValueError as e:
+        raise ImportError(
+            f'"{dotted_path}" doesn\'t look like a module path') from e
+
+    module = import_module(module_path)
+    try:
+        return getattr(module, class_name)
+    except AttributeError as e:
+        raise ImportError(
+            f'Module "{module_path}" does not define a "{class_name}" '
+            f'attribute') from e
+
+
 def as_int(f: float) -> int:
     return int(round(f))
 

setup.py

@@ -47,7 +47,6 @@ def readfile(filename: str) -> str:
         'async-timeout>=3.0.0, <5.0',
         'aioredis>=1.1.0, <2.0',
         'click>=6.7',
-        'pydantic>=0.20',
         'typing_extensions>=4.0; python_version<"3.8"',
     ],
     extras_require={