Make serde-ext Fields and validators available

Makefile

@@ -13,13 +13,13 @@ clean: docs-clean ## Remove all build artifacts.
 	find . \( -name *.pyc -o -name *.pyo -o -name __pycache__ -o -name *.egg-info \) -exec rm -rf {} +
 
 install: ## Install package and all features.
-	$(VIRTUAL_ENV)/bin/pip install -e ".[cbor,toml,yaml]"
+	$(VIRTUAL_ENV)/bin/pip install -e ".[ext,cbor,toml,yaml]"
 
 install-plain: ## Install package, all features, and testing dependencies.
-	$(VIRTUAL_ENV)/bin/pip install -e ".[cbor,toml,yaml,dev.test]"
+	$(VIRTUAL_ENV)/bin/pip install -e ".[ext,cbor,toml,yaml,dev.test]"
 
 install-dev: ## Install package, all features, and linting and testing dependencies.
-	$(VIRTUAL_ENV)/bin/pip install -e ".[cbor,toml,yaml,dev.lint,dev.test]"
+	$(VIRTUAL_ENV)/bin/pip install -e ".[ext,cbor,toml,yaml,dev.lint,dev.test]"
 
 install-all: install-dev ## Install package, all features, and all development dependencies.
 	$(VIRTUAL_ENV)/bin/pip install sphinx twine

RELEASES.rst

@@ -1,6 +1,13 @@
 Releases
 ========
 
+0.5.1
+-----
+
+- Reexport `serde-ext`_ Fields and validators. (`#75`_)
+
+.. _#75: https://github.com/rossmacarthur/serde/pull/75
+
 0.5.0
 -----
 

setup.py

@@ -40,6 +40,9 @@ def get_metadata():
     'six >=1.0.0, <2.0.0',
     'validators >=0.12.0, <0.13.0'
 ]
+ext_requires = [
+    'serde-ext >=0.1.0, <0.2.0'
+]
 cbor_requires = [
     'cbor2 >=4.0.0, <5.0.0'
 ]
@@ -73,6 +76,7 @@ def get_metadata():
     # Options
     install_requires=install_requires,
     extras_require={
+        'ext': ext_requires,
         'cbor': cbor_requires,
         'json': json_requires,
         'toml': toml_requires,

src/serde/fields.py

@@ -56,7 +56,7 @@
 
 from serde import validate
 from serde.exceptions import SerdeError, SkipSerialization, ValidationError
-from serde.utils import zip_equal
+from serde.utils import try_import_all, zip_equal
 
 
 __all__ = [
@@ -1336,3 +1336,6 @@ def deserialize(self, value):
     FIELD_CLASSES[unicode] = Unicode
 except NameError:
     pass
+
+
+try_import_all('serde_ext.fields', globals())

src/serde/utils.py

@@ -51,6 +51,25 @@ def try_import(name, package=None):
         pass
 
 
+def try_import_all(name, namespace):
+    """
+    Try import the names from the given library, ignoring ImportErrors.
+
+    Args:
+        name (str): the name to import.
+        namespace (dict): the namespace to update.
+    """
+    module = try_import(name)
+
+    if module:
+        if hasattr(module, '__all__'):
+            all_names = module.__all__
+        else:
+            all_names = (name for name in dir(module) if not name.startswith('_'))
+
+        namespace.update({name: getattr(module, name) for name in all_names})
+
+
 def zip_equal(*iterables):
     """
     A zip function that validates that all the iterables have the same length.

src/serde/validate.py

@@ -3,6 +3,7 @@
 """
 
 from serde.exceptions import ValidationError
+from serde.utils import try_import_all
 
 
 __all__ = [
@@ -315,3 +316,6 @@ def contains_(value):
             raise ValidationError('{!r} is not a valid choice'.format(value))
 
     return contains_
+
+
+try_import_all('serde_ext.validate', globals())