Add a general-config feature to add all countries to RegionCodeList

docs/api.rst

@@ -10,6 +10,7 @@ API documentation
 
    api/nomenclature
    api/datastructuredefinition
+   api/datastructureconfig
    api/codelist
    api/regionprocessor
    api/testing

docs/api/datastructureconfig.rst

@@ -0,0 +1,7 @@
+.. currentmodule:: nomenclature.config
+
+**DataStructureConfig**
+=======================
+
+.. autoclass:: DataStructureConfig
+   :members: from_file

docs/api/datastructuredefinition.rst

@@ -4,4 +4,4 @@
 ===========================
 
 .. autoclass:: DataStructureDefinition
-   :members:
+   :members: validate, check_aggregate, to_excel

docs/user_guide/directory-structure.rst

@@ -11,6 +11,7 @@ This is the directory structure for validation and region processing:
 
    .
    ├── definitions
+   │   ├── config.yaml
    │   ├── region
    │   │   ├── regions.yaml
    │   │   └── ...
@@ -32,5 +33,8 @@ The :class:`DataStructureDefinition` reads the codelists from the *definitions*
   object is initialized, all files in a dimension folder are combined into a single
   :class:`CodeList` object for that dimension.
 
+* General configurations of the :class:`DataStructureDefinition` can be specified
+  via the *config.yaml*  file.
+
 The :class:`RegionProcessor` reads model-specific region-mappings from the *mappings*
 folder. If the project has no model specific mappings, this folder can also be omitted.

nomenclature/code.py

@@ -217,6 +217,8 @@ class RegionCode(Code):
         Name of the RegionCode
     hierarchy : str
         Hierarchy of the RegionCode
+    iso3_codes : str or list of str
+        ISO3 codes of countries in that region
 
     """
 

nomenclature/codelist.py

@@ -8,14 +8,43 @@
 from pyam.utils import write_sheet
 from pydantic import BaseModel, validator
 
+from pycountry import countries
+
 from nomenclature.code import Code, MetaCode, RegionCode, VariableCode
+from nomenclature.config import DataStructureConfig
 from nomenclature.error.codelist import DuplicateCodeError
 from nomenclature.error.variable import (
     MissingWeightError,
     VariableRenameArgError,
     VariableRenameTargetError,
 )
 
+
+# The RegionCodeList uses pycountry to (optionally) add all countries and ISO3 codes
+# For readability and in line with conventions of the IAMC community,
+# several "standard" country names are shortened
+# Please keep this list in sync with `templates/model-registration-template.xlsx`
+PYCOUNTRY_NAME_OVERRIDE = {
+    "Bolivia, Plurinational State of": "Bolivia",
+    "Holy See (Vatican City State)": "Vatican",
+    "Micronesia, Federated States of": "Micronesia",
+    "Congo, The Democratic Republic of the": "Democratic Republic of the Congo",
+    "Iran, Islamic Republic of": "Iran",
+    "Korea, Republic of": "South Korea",
+    "Korea, Democratic People's Republic of": "North Korea",
+    "Lao People's Democratic Republic": "Laos",
+    "Syrian Arab Republic": "Syria",
+    "Moldova, Republic of": "Moldova",
+    "Tanzania, United Republic of": "Tanzania",
+    "Venezuela, Bolivarian Republic of": "Venezuela",
+    "Palestine, State of": "Palestine",
+    "Taiwan, Province of China": "Taiwan",
+}
+PYCOUNTRY_NAME_ADD = [
+    "Kosovo",
+]
+
+
 here = Path(__file__).parent.absolute()
 
 
@@ -164,7 +193,13 @@ def _parse_and_replace_tags(
         return codes_without_tags + codes_with_tags
 
     @classmethod
-    def from_directory(cls, name: str, path: Path, file_glob_pattern: str = "**/*"):
+    def from_directory(
+        cls,
+        name: str,
+        path: Path,
+        config: DataStructureConfig = None,
+        file_glob_pattern: str = "**/*",
+    ):
         """Initialize a CodeList from a directory with codelist files
 
         Parameters
@@ -173,12 +208,14 @@ def from_directory(cls, name: str, path: Path, file_glob_pattern: str = "**/*"):
             Name of the CodeList
         path : :class:`pathlib.Path` or path-like
             Directory with the codelist files
+        config: :class:`DataStructureConfig`, optional
+            Attributes for configuring the CodeList
         file_glob_pattern : str, optional
             Pattern to downselect codelist files by name
 
         Returns
         -------
-        instance of cls (CodeList if not inherited)
+        instance of cls (:class:`CodeList` if not inherited)
 
         """
         code_list: List[Code] = []
@@ -511,7 +548,13 @@ class RegionCodeList(CodeList):
     validation_schema: ClassVar[str] = "region"
 
     @classmethod
-    def from_directory(cls, name: str, path: Path, file_glob_pattern: str = "**/*"):
+    def from_directory(
+        cls,
+        name: str,
+        path: Path,
+        config: DataStructureConfig = None,
+        file_glob_pattern: str = "**/*",
+    ):
         """Initialize a RegionCodeList from a directory with codelist files
 
         Parameters
@@ -520,6 +563,8 @@ def from_directory(cls, name: str, path: Path, file_glob_pattern: str = "**/*"):
             Name of the CodeList
         path : :class:`pathlib.Path` or path-like
             Directory with the codelist files
+        config : :class:`DataStructureConfig`, optional
+            Attributes for configuring the CodeList
         file_glob_pattern : str, optional
             Pattern to downselect codelist files by name, default: "**/*" (i.e. all
             files in all sub-folders)
@@ -529,9 +574,22 @@ def from_directory(cls, name: str, path: Path, file_glob_pattern: str = "**/*"):
         RegionCodeList
 
         """
-        mapping: Dict[str, RegionCode] = {}
+
         code_list: List[RegionCode] = []
 
+        if config is not None and config.region is not None:
+            if config.region.country is True:
+                for i in countries:
+                    code_list.append(
+                        RegionCode(
+                            name=PYCOUNTRY_NAME_OVERRIDE.get(i.name, i.name),
+                            iso3_codes=i.alpha_3,
+                            hierarchy="Country",
+                        )
+                    )
+                for c in PYCOUNTRY_NAME_ADD:
+                    code_list.append(RegionCode(name=c, hierarchy="Country"))
+
         for yaml_file in (
             f
             for f in path.glob(file_glob_pattern)

nomenclature/config.py

@@ -0,0 +1,39 @@
+from pathlib import Path
+from typing import Dict, Optional
+from pydantic import BaseModel
+
+import yaml
+
+
+class RegionCodeListConfig(BaseModel):
+    country: Optional[bool]
+
+
+class DataStructureConfig(BaseModel):
+    """A class for configuration of a DataStructureDefinition
+
+    Attributes
+    ----------
+    region : RegionCodeListConfig
+        Attributes for configuring the RegionCodeList
+
+    """
+
+    region: Optional[RegionCodeListConfig]
+
+    @classmethod
+    def from_file(cls, path: Path, file: str):
+        """Read a DataStructureConfig from a file
+
+        Parameters
+        ----------
+        path : :class:`pathlib.Path` or path-like
+            `definitions` directory
+        file : str
+            File name
+
+        """
+        with open(path / file, "r", encoding="utf-8") as stream:
+            config = yaml.safe_load(stream)
+
+        return cls(region=RegionCodeListConfig(**config["region"]))

nomenclature/definition.py

@@ -12,6 +12,7 @@
     VariableCodeList,
     MetaCodeList,
 )
+from nomenclature.config import DataStructureConfig
 from nomenclature.validation import validate
 
 logger = logging.getLogger(__name__)
@@ -37,19 +38,25 @@ def __init__(self, path, dimensions=None):
             from a sub-folder of `path` of that name.
         """
 
-        if dimensions is None:
-            dimensions = ["region", "variable"]
-
         if not isinstance(path, Path):
             path = Path(path)
 
         if not path.is_dir():
             raise NotADirectoryError(f"Definitions directory not found: {path}")
 
-        self.dimensions = dimensions
+        if (path / "config.yaml").exists():
+            self.config = DataStructureConfig.from_file(
+                path=path,
+                file="config.yaml",
+            )
+        else:
+            self.config = DataStructureConfig()
+
+        self.dimensions = dimensions or ["region", "variable"]
         for dim in self.dimensions:
+            codelist_cls = SPECIAL_CODELIST.get(dim, CodeList)
             self.__setattr__(
-                dim, SPECIAL_CODELIST.get(dim, CodeList).from_directory(dim, path / dim)
+                dim, codelist_cls.from_directory(dim, path / dim, self.config)
             )
 
         empty = [d for d in self.dimensions if not self.__getattribute__(d)]

tests/data/general-config-definitions/config.yaml

@@ -0,0 +1,2 @@
+region:
+  country: true

tests/data/general-config-definitions/region/regions.yaml

@@ -0,0 +1,2 @@
+- common:
+  - World

tests/test_definition.py

@@ -40,6 +40,22 @@ def test_empty_codelist_raises():
         DataStructureDefinition(TEST_DATA_DIR / "simple_codelist")
 
 
+def test_definition_from_general_config():
+    obs = DataStructureDefinition(
+        TEST_DATA_DIR / "general-config-definitions",
+        dimensions=["region"],
+    )
+
+    # explicitly defined in `general-config-definitions/region/regions.yaml`
+    assert "World" in obs.region
+    # added via general-config definitions
+    assert "Austria" in obs.region
+    # added via general-config definitions renamed from pycountry name
+    assert "Bolivia" in obs.region
+    # added via general-config definitions in addition to pycountry.countries
+    assert "Kosovo" in obs.region
+
+
 def test_to_excel(simple_definition, tmpdir):
     """Check writing a DataStructureDefinition to file"""
     file = tmpdir / "testing_export.xlsx"