Adds strict keyword to yaml; addresses #218 (#219)

* Adds strict keyword to yaml; addresses #218

* Still for #218; fix sphinxdoc inference

* A friendly helper for reminding to build the docs

Co-authored-by: Steve Taylor <stta9820@colorado.edu>

.github/CONTRIBUTING.md

@@ -62,6 +62,9 @@ each pull request:
 Before submitting your changes for review, make sure to check that your changes
 do not break any tests by running: ``pytest tests/``
 
+Additionally, sphinxdocs may block you; make sure that the docs build successfully:
+``python -m sphinx -E -W -b=doctest "docs/source" "docs/_build"``
+
 ### Raising Pull Requests
 
 Once your changes are ready to be submitted, make sure to push your changes to

docs/source/schema_inference.rst

@@ -194,6 +194,7 @@ is a convenience method for this functionality.
         less_than_or_equal_to: 2.0
       name: null
     coerce: true
+    strict: false
 
 You can edit this yaml file by specifying column names under the ``column``
 key. The respective values map onto key-word arguments in the

pandera/io.py

@@ -87,6 +87,7 @@ def _serialize_schema(dataframe_schema):
         "columns": columns,
         "index": index,
         "coerce": dataframe_schema.coerce,
+        "strict": dataframe_schema.strict,
     }
 
 
@@ -169,6 +170,7 @@ def _deserialize_schema(serialized_schema):
         },
         index=index,
         coerce=serialized_schema["coerce"],
+        strict=serialized_schema["strict"],
     )
 
 

tests/test_io.py

@@ -61,9 +61,11 @@ def _create_schema(index="single"):
                     pa.Check.greater_than(pd.Timedelta(1000, unit="ns")),
                     pa.Check.less_than(pd.Timedelta(10000, unit="ns")),
                 ]
-            )
+            ),
         },
         index=index,
+        coerce=False,
+        strict=True
     )
 
 
@@ -119,6 +121,7 @@ def _create_schema(index="single"):
   checks: null
   name: int_index
 coerce: false
+strict: true
 """.format(version=pa.__version__)