Support streaming (#1)

- Replace data file URL (1f89a9f30813984610ab912104f746c479655661)

coarse_discourse.py

@@ -2,7 +2,6 @@
 
 
 import json
-import os
 
 import datasets
 
@@ -16,7 +15,8 @@ _CITATION = """\
 _DESCRIPTION = """\
 dataset contains discourse annotation and relation on threads from reddit during 2016
 """
-_URL = "https://github.com/google-research-datasets/coarse-discourse/archive/master.zip"
+# From: https://github.com/google-research-datasets/coarse-discourse
+_URL = "https://raw.githubusercontent.com/google-research-datasets/coarse-discourse/master/coarse_discourse_dataset.json"
 
 
 class CoarseDiscourse(datasets.GeneratorBasedBuilder):
@@ -67,13 +67,13 @@ class CoarseDiscourse(datasets.GeneratorBasedBuilder):
         # TODO(coarse_discourse): Downloads the data and defines the splits
         # dl_manager is a datasets.download.DownloadManager that can be used to
         # download and extract URLs
-        dl_dir = dl_manager.download_and_extract(_URL)
+        data_path = dl_manager.download(_URL)
         return [
             datasets.SplitGenerator(
                 name=datasets.Split.TRAIN,
                 # These kwargs will be passed to _generate_examples
                 gen_kwargs={
-                    "filepath": os.path.join(dl_dir, "coarse-discourse-master", "coarse_discourse_dataset.json")
+                    "filepath": data_path,
                 },
             ),
         ]