c loaders/dumpers

Author: wimglenn

.travis.yml

@@ -4,10 +4,10 @@ sudo: false
 
 python:
   - "2.7"
-  - "3.4"
   - "3.5"
   - "3.6"
-  - "3.7-dev"
+  - "3.7"
+  - "3.8"
   - "nightly"
   - "pypy"
   - "pypy3"
@@ -16,7 +16,7 @@ env:
   - PYYAML_VERSION="3.13"
   # - PYYAML_VERSION="4.1"  # this was pulled from the index (!) ..wtf, Ingy?
   - PYYAML_VERSION="4.2b4"
-  - PYYAML_VERSION="5.1"
+  - PYYAML_VERSION="5.3"
 
 matrix:
   fast_finish: true

oyaml.py

@@ -25,29 +25,29 @@ def map_constructor(loader, node):
         raise
 
 
-if pyyaml.safe_dump is pyyaml.dump:
-    # PyYAML v4.x
-    SafeDumper = pyyaml.dumper.Dumper
-    DangerDumper = pyyaml.dumper.DangerDumper
+_loaders = [getattr(pyyaml.loader, x) for x in pyyaml.loader.__all__]
+_dumpers = [getattr(pyyaml.dumper, x) for x in pyyaml.dumper.__all__]
+try:
+    _cyaml = pyyaml.cyaml.__all__
+except AttributeError:
+    pass
 else:
-    SafeDumper = pyyaml.dumper.SafeDumper
-    DangerDumper = pyyaml.dumper.Dumper
-
-pyyaml.add_representer(dict, map_representer, Dumper=SafeDumper)
-pyyaml.add_representer(OrderedDict, map_representer, Dumper=SafeDumper)
-pyyaml.add_representer(dict, map_representer, Dumper=DangerDumper)
-pyyaml.add_representer(OrderedDict, map_representer, Dumper=DangerDumper)
+    _loaders += [getattr(pyyaml.cyaml, x) for x in _cyaml if x.endswith("Loader")]
+    _dumpers += [getattr(pyyaml.cyaml, x) for x in _cyaml if x.endswith("Dumper")]
 
+Dumper = None
+for Dumper in _dumpers:
+    pyyaml.add_representer(dict, map_representer, Dumper=Dumper)
+    pyyaml.add_representer(OrderedDict, map_representer, Dumper=Dumper)
 
 Loader = None
 if not _std_dict_is_order_preserving:
-    for loader_name in pyyaml.loader.__all__:
-        Loader = getattr(pyyaml.loader, loader_name)
+    for Loader in _loaders:
         pyyaml.add_constructor("tag:yaml.org,2002:map", map_constructor, Loader=Loader)
 
 
 # Merge PyYAML namespace into ours.
 # This allows users a drop-in replacement:
 #   import oyaml as yaml
-del map_constructor, map_representer, SafeDumper, DangerDumper, Loader
+del map_constructor, map_representer, Loader, Dumper
 from yaml import *

setup.py

@@ -2,7 +2,7 @@
 
 setup(
     name="oyaml",
-    version="0.9",
+    version="1.0",
     description="Ordered YAML: drop-in replacement for PyYAML which preserves dict ordering",
     long_description=open("README.rst").read(),
     author="Wim Glenn",

test_oyaml.py

@@ -192,3 +192,17 @@ def test_merge():
 def test_unhashable_error_context():
     with pytest.raises(ConstructorError, match=r".*line.*column.*"):
         yaml.safe_load("{foo: bar}: baz")
+
+
+@pytest.mark.skipif(not hasattr(yaml, "CSafeLoader"), reason="requires cyaml loaders")
+def test_explicit_loader():
+    data = yaml.load("{x: 1, z: 3, y: 2}", Loader=yaml.CSafeLoader)
+    assert data == {"x": 1, "z": 3, "y": 2}
+    assert list(data) == ["x", "z", "y"]
+
+
+@pytest.mark.skipif(not hasattr(yaml, "CSafeDumper"), reason="requires cyaml dumpers")
+def test_explicit_dumper():
+    data = OrderedDict([("x", 1), ("z", 3), ("y", 2)])
+    text = yaml.dump(data, Dumper=yaml.CSafeDumper, default_flow_style=None)
+    assert text == "{x: 1, z: 3, y: 2}\n"