Being able to seriablize

pmd.py

@@ -20,6 +20,8 @@ from abc import abstractmethod
 from hashlib import md5
 from pathlib import Path
 from typing import Any, Dict, List, Optional
+
+from datetime import datetime
 from urllib.parse import unquote_plus
 
 # TODO: @thomasw21
@@ -53,6 +55,13 @@ _FEATURES = datasets.Features(
 )
 
 
+def json_serializer(o):
+    if isinstance(o, datetime):
+        return str(o)
+
+    raise TypeError(f"Object of type {o.__class__.__name__} is not JSON serializable")
+
+
 class BaseLoader:
     def __init__(
         self,
@@ -149,7 +158,8 @@ class COCOloader(BaseLoaderWithDLManager):
     def generate_gen_kwargs(self, dl_manager):
         annotation_file = (
             Path(dl_manager.download_and_extract(self._ANNOTATION_URL))
-            / "annotations" / f"captions_{self._SPLIT_MAP[self.split]}.json"
+            / "annotations"
+            / f"captions_{self._SPLIT_MAP[self.split]}.json"
         )
         image_folder = Path(
             dl_manager.download_and_extract(self._IMAGES_URLS[self.split])
@@ -184,7 +194,12 @@ class COCOloader(BaseLoaderWithDLManager):
                         "texts": [annotation["caption"]],
                         "source": self.source,
                         "meta": json.dumps(
-                            {"image_metadata": image_metadata, "annotation": annotation}
+                            {
+                                "image_metadata": image_metadata,
+                                "annotation": annotation,
+                            },
+                            default=json_serializer,
+                            indent=2,
                         ),
                     }
 
@@ -206,7 +221,11 @@ class SBULoader(DatasetsLoader):
                 "image": None,
                 "texts": [row["caption"]],
                 "source": self.source,
-                "meta": json.dumps(meta),
+                "meta": json.dumps(
+                    meta,
+                    default=json_serializer,
+                    indent=2,
+                ),
             }
         ]
 
@@ -239,7 +258,11 @@ class LocalizedNarrativesOpenImagesLoader(BaseLoaderWithDLManager):
                     "image": None,
                     "texts": [annotation["caption"]],
                     "source": self.source,
-                    "meta": json.dumps(annotation),
+                    "meta": json.dumps(
+                        annotation,
+                        default=json_serializer,
+                        indent=2,
+                    ),
                 }
 
 
@@ -283,7 +306,11 @@ class LocalizedNarrativesCOCOLoader(BaseLoaderWithDLManager):
                     "image": str(image_path.absolute()),
                     "texts": [annotation["caption"]],
                     "source": self.source,
-                    "meta": json.dumps(annotation),
+                    "meta": json.dumps(
+                        annotation,
+                        default=json_serializer,
+                        indent=2,
+                    ),
                 }
 
 
@@ -341,7 +368,11 @@ class LocalizedNarrativesFlickr30kLoader(BaseLoaderWithDLManager):
                     "image": str(image_path.absolute()),
                     "texts": [annotation["caption"]],
                     "source": self.source,
-                    "meta": json.dumps(annotation),
+                    "meta": json.dumps(
+                        annotation,
+                        default=json_serializer,
+                        indent=2,
+                    ),
                 }
 
 
@@ -386,7 +417,11 @@ class LocalizedNarrativesADE20kLoader(BaseLoaderWithDLManager):
                     "image": str(image_path.absolute()),
                     "texts": [annotation["caption"]],
                     "source": self.source,
-                    "meta": json.dumps(annotation),
+                    "meta": json.dumps(
+                        annotation,
+                        default=json_serializer,
+                        indent=2,
+                    ),
                 }
 
 
@@ -415,7 +450,11 @@ class VisualGenomeLoader(DatasetsLoader):
                 ),
                 "texts": [region["phrase"]],
                 "source": self.source,
-                "meta": json.dumps(meta),
+                "meta": json.dumps(
+                    meta,
+                    default=json_serializer,
+                    indent=2,
+                ),
             }
             for region in row["regions"]
         ]
@@ -447,7 +486,11 @@ class WITLoader(DatasetsLoader):
                     ]
                 ],
                 "source": self.source,
-                "meta": json.dumps(meta),
+                "meta": json.dumps(
+                    meta,
+                    default=json_serializer,
+                    indent=2,
+                ),
             }
         ]
 
@@ -469,7 +512,11 @@ class ConceptualCaptions(DatasetsLoader):
                 "image": None,
                 "texts": [row["caption"]],
                 "source": self.source,
-                "meta": json.dumps(meta),
+                "meta": json.dumps(
+                    meta,
+                    default=json_serializer,
+                    indent=2,
+                ),
             }
         ]
 
@@ -491,7 +538,11 @@ class Conceptual12MLoader(DatasetsLoader):
                 "image": None,
                 "texts": [row["caption"]],
                 "source": self.source,
-                "meta": json.dumps(meta),
+                "meta": json.dumps(
+                    meta,
+                    default=json_serializer,
+                    indent=2,
+                ),
             }
         ]
 
@@ -514,7 +565,11 @@ class RedCapsLoader(DatasetsLoader):
                 # TODO @thomasw21
                 "texts": [row["raw_caption"]],
                 "source": self.source,
-                "meta": json.dumps(meta),
+                "meta": json.dumps(
+                    meta,
+                    default=json_serializer,
+                    indent=2,
+                ),
             }
         ]
 
@@ -663,7 +718,11 @@ class YFCC100MLoader(BaseLoaderWithDLManager):
                         "image": None,
                         "texts": [text],
                         "source": self.source,
-                        "meta": json.dumps(annotation),
+                        "meta": json.dumps(
+                            annotation,
+                            default=json_serializer,
+                            indent=2,
+                        ),
                     }
             cursor.close()