Support reading excel files from the DESIGN_MATRIX keyword

- Adds functionality to the DesignMatrix dataclass for reading
design matrix excel files into pandas dataframes, akin to design2params
in semeio.

pyproject.toml

@@ -49,6 +49,7 @@ dependencies = [
     "matplotlib",
     "netCDF4",
     "numpy<2",
+    "openpyxl",  # extra dependency for pandas (excel)
     "orjson",
     "packaging",
     "pandas",

src/ert/config/design_matrix.py

@@ -2,20 +2,37 @@
 
 from dataclasses import dataclass
 from pathlib import Path
-from typing import List
+from typing import TYPE_CHECKING, Dict, List, Optional, Union
+
+import numpy as np
+import pandas as pd
+from pandas.api.types import is_integer_dtype
+
+from ert.config.gen_kw_config import GenKwConfig, TransformFunctionDefinition
 
 from ._option_dict import option_dict
 from .parsing import (
     ConfigValidationError,
     ErrorInfo,
 )
 
+if TYPE_CHECKING:
+    from ert.config import (
+        ParameterConfig,
+    )
+
+DESIGN_MATRIX_GROUP = "DESIGN_MATRIX"
+
 
 @dataclass
 class DesignMatrix:
     xls_filename: Path
     design_sheet: str
     default_sheet: str
+    num_realizations: Optional[int] = None
+    active_realizations: Optional[List[bool]] = None
+    design_matrix_df: Optional[pd.DataFrame] = None
+    parameter_configuration: Optional[Dict[str, ParameterConfig]] = None
 
     @classmethod
     def from_config_list(cls, config_list: List[str]) -> "DesignMatrix":
@@ -56,3 +73,167 @@ def from_config_list(cls, config_list: List[str]) -> "DesignMatrix":
             design_sheet=design_sheet,
             default_sheet=default_sheet,
         )
+
+    def read_design_matrix(
+        self,
+    ) -> None:
+        param_names = (
+            pd.read_excel(
+                self.xls_filename,
+                sheet_name=self.design_sheet,
+                nrows=1,
+                header=None,
+                dtype="string",
+            )
+            .iloc[0]
+            .apply(lambda x: x.strip() if isinstance(x, str) else x)
+        )
+        design_matrix_df = DesignMatrix._read_excel(
+            self.xls_filename,
+            self.design_sheet,
+            header=None,
+            skiprows=1,
+        )
+        design_matrix_df.columns = param_names.to_list()
+
+        if "REAL" in design_matrix_df.columns:
+            if not is_integer_dtype(design_matrix_df.dtypes["REAL"]) or any(
+                design_matrix_df["REAL"] < 0
+            ):
+                raise ValueError("REAL column must only contain positive integers")
+            design_matrix_df = design_matrix_df.set_index(
+                "REAL", drop=True, verify_integrity=True
+            )
+
+        if error_list := DesignMatrix._validate_design_matrix(design_matrix_df):
+            error_msg = "\n".join(error_list)
+            raise ValueError(f"Design matrix is not valid, error:\n{error_msg}")
+
+        defaults = DesignMatrix._read_defaultssheet(
+            self.xls_filename, self.default_sheet
+        )
+        for k, v in defaults.items():
+            if k not in design_matrix_df.columns:
+                design_matrix_df[k] = v
+
+        parameter_configuration: Dict[str, ParameterConfig] = {}
+        transform_function_definitions: List[TransformFunctionDefinition] = []
+        for parameter in design_matrix_df.columns:
+            transform_function_definitions.append(
+                TransformFunctionDefinition(
+                    name=parameter,
+                    param_name="RAW",
+                    values=[],
+                )
+            )
+        parameter_configuration[DESIGN_MATRIX_GROUP] = GenKwConfig(
+            name=DESIGN_MATRIX_GROUP,
+            forward_init=False,
+            template_file=None,
+            output_file=None,
+            transform_function_definitions=transform_function_definitions,
+            update=False,
+        )
+
+        design_matrix_df.columns = pd.MultiIndex.from_product(
+            [[DESIGN_MATRIX_GROUP], design_matrix_df.columns]
+        )
+        reals = design_matrix_df.index.tolist()
+        self.num_realizations = len(reals)
+        self.active_realizations = [x in reals for x in range(max(reals) + 1)]
+
+        self.design_matrix_df = design_matrix_df
+        self.parameter_configuration = parameter_configuration
+
+    @staticmethod
+    def _read_excel(
+        file_name: Union[Path, str],
+        sheet_name: str,
+        usecols: Optional[Union[int, List[int]]] = None,
+        header: Optional[int] = 0,
+        skiprows: Optional[int] = None,
+        dtype: Optional[str] = None,
+    ) -> pd.DataFrame:
+        """
+        Make dataframe from excel file
+        :return: Dataframe
+        :raises: OsError if file not found
+        :raises: ValueError if file not loaded correctly
+        """
+        dframe: pd.DataFrame = pd.read_excel(
+            file_name,
+            sheet_name,
+            usecols=usecols,
+            header=header,
+            skiprows=skiprows,
+            dtype=dtype,
+        )
+        return dframe.dropna(axis=1, how="all")
+
+    @staticmethod
+    def _validate_design_matrix(design_matrix: pd.DataFrame) -> List[str]:
+        """
+        Validate user inputted design matrix
+        :raises: ValueError if design matrix contains empty headers or empty cells
+        """
+        if design_matrix.empty:
+            return []
+        errors = []
+        column_na_mask = design_matrix.columns.isna()
+        column_indexes_unnamed = [
+            index for index, value in enumerate(column_na_mask) if value
+        ]
+        if len(column_indexes_unnamed) > 0:
+            errors.append(
+                f"Column headers not present in column {column_indexes_unnamed}"
+            )
+        if not design_matrix.columns[~column_na_mask].is_unique:
+            errors.append("Duplicate parameter names found in design sheet")
+        empties = [
+            f"Realization {design_matrix.index[i]}, column {design_matrix.columns[j]}"
+            for i, j in zip(*np.where(pd.isna(design_matrix)))
+        ]
+        if len(empties) > 0:
+            errors.append(f"Design matrix contains empty cells {empties}")
+        return errors
+
+    @staticmethod
+    def _read_defaultssheet(
+        xls_filename: Union[Path, str], defaults_sheetname: str
+    ) -> Dict[str, Union[str, float]]:
+        """
+        Construct a dict of keys and values to be used as defaults from the
+        first two columns in a spreadsheet.
+
+        Returns a dict of default values
+
+        :raises: ValueError if defaults sheet is non-empty but non-parsable
+        """
+        default_df = DesignMatrix._read_excel(
+            xls_filename,
+            defaults_sheetname,
+            header=None,
+            dtype="string",
+        )
+        if default_df.empty:
+            return {}
+        if len(default_df.columns) < 2:
+            raise ValueError("Defaults sheet must have at least two columns")
+        empty_cells = [
+            f"Row {default_df.index[i]}, column {default_df.columns[j]}"
+            for i, j in zip(*np.where(pd.isna(default_df)))
+        ]
+        if len(empty_cells) > 0:
+            raise ValueError(f"Default sheet contains empty cells {empty_cells}")
+        default_df[0] = default_df[0].apply(lambda x: x.strip())
+        if not default_df[0].is_unique:
+            raise ValueError("Default sheet contains duplicate parameter names")
+
+        return {row[0]: convert_to_numeric(row[1]) for _, row in default_df.iterrows()}
+
+
+def convert_to_numeric(x: str) -> Union[str, float]:
+    try:
+        return pd.to_numeric(x)
+    except ValueError:
+        return x

src/ert/config/gen_kw_config.py

@@ -70,9 +70,7 @@ class TransformFunctionDefinition:
 class GenKwConfig(ParameterConfig):
     template_file: Optional[str]
     output_file: Optional[str]
-    transform_function_definitions: (
-        List[TransformFunctionDefinition] | List[Dict[Any, Any]]
-    )
+    transform_function_definitions: List[TransformFunctionDefinition]
     forward_init_file: Optional[str] = None
 
     def __post_init__(self) -> None:
@@ -90,6 +88,9 @@ def __post_init__(self) -> None:
                 )
         self._validate()
 
+    def __contains__(self, item: str) -> bool:
+        return item in [v.name for v in self.transform_function_definitions]
+
     def __len__(self) -> int:
         return len(self.transform_functions)