add date filter

europeana_newspapers.py

@@ -14,13 +14,16 @@
 # limitations under the License.
 """TODO"""
 
-import os
 
 import pyarrow as pa
 import pyarrow.parquet as pq
 from datasets import Value, Sequence
 import datasets
-from pathlib import Path
+from datasets.config import PYARROW_VERSION
+
+if not PYARROW_VERSION.major > 6:
+    print("pyarrow version >6 required for this loading script")
+
 
 _DESCRIPTION = "TODO"
 
@@ -37,7 +40,9 @@ _DATA = {
 class EuropeanaNewspapersConfig(datasets.BuilderConfig):
     """BuilderConfig for the Europeana Newspapers dataset."""
 
-    def __init__(self, *args, languages=None, **kwargs):
+    def __init__(
+        self, *args, languages=None, min_decade=None, max_decade=None, **kwargs
+    ):
         """BuilderConfig for the GitHub Code dataset.
 
         Args:
@@ -50,7 +55,14 @@ class EuropeanaNewspapersConfig(datasets.BuilderConfig):
             name="+".join(languages),
             **kwargs,
         )
+        for lang in languages:
+            if not lang in _LANG_CONFIGS:
+                raise ValueError(
+                    f"{lang} not a valid language key for this dataset, valid keys are {_LANG_CONFIGS}"
+                )
         self.languages = languages
+        self.min_decade = min_decade
+        self.max_decade = max_decade
 
 
 class EuropeanaNewspapers(datasets.GeneratorBasedBuilder):
@@ -98,10 +110,32 @@ class EuropeanaNewspapers(datasets.GeneratorBasedBuilder):
     def _split_generators(self, dl_manager):
         # parquet_files = list(Path(".").rglob("*.parquet"))
         languages = self.config.languages
+        min_decade = self.config.min_decade
+        max_decade = self.config.max_decade
         data_files = []
         for language in languages:
-            for decade in _DATA[language].values():
-                data_files.append(decade)
+            for decade, file in _DATA[language].items():
+                decade = int(decade)
+                if max_decade is None and min_decade is None:
+                    data_files.append(file)
+                if (
+                    max_decade is not None
+                    and min_decade is not None
+                    and min_decade <= decade <= max_decade
+                ):
+                    data_files.append(file)
+                if (
+                    min_decade is not None
+                    and max_decade is None
+                    and decade >= min_decade
+                ):
+                    data_files.append(file)
+                if (
+                    min_decade is None
+                    and max_decade is not None
+                    and decade <= max_decade
+                ):
+                    data_files.append(file)
 
         files = dl_manager.download(data_files)
         return [