Fix style

cantemist.py

@@ -39,7 +39,7 @@ from .bigbiohub import parse_brat_file
 from .bigbiohub import brat_parse_to_bigbio_kb
 
 
-_LANGUAGES = ['Spanish']
+_LANGUAGES = ["Spanish"]
 _PUBMED = False
 _LOCAL = False
 _CITATION = """\
@@ -81,10 +81,10 @@ For further information, please visit https://temu.bsc.es/cantemist or send an e
 
 _HOMEPAGE = "https://temu.bsc.es/cantemist/?p=4338"
 
-_LICENSE = 'Creative Commons Attribution 4.0 International'
+_LICENSE = "Creative Commons Attribution 4.0 International"
 
 _URLS = {
-    "cantemist": "https://zenodo.org/record/3978041/files/cantemist.zip?download=1",
+    _DATASETNAME: "https://zenodo.org/record/3978041/files/cantemist.zip?download=1",
 }
 
 _SUPPORTED_TASKS = [
@@ -231,7 +231,7 @@ class CantemistDataset(datasets.GeneratorBasedBuilder):
         call `this._generate_examples` with the keyword arguments in `gen_kwargs`.
         """
 
-        data_dir = dl_manager.download_and_extract(_URLS["cantemist"])
+        data_dir = dl_manager.download_and_extract(_URLS[_DATASETNAME])
 
         return [
             datasets.SplitGenerator(