Merge branch 'ImagingDataCommons:main' into feat-download-progress

idc_index/index.py

@@ -32,7 +32,7 @@ def __init__(self):
         # Read index file
         logger.debug(f"Reading index file v{idc_index_data.__version__}")
         self.index = pd.read_parquet(file_path)
-        self.index = self.index.astype(str).replace("nan", "")
+        # self.index = self.index.astype(str).replace("nan", "")
         self.index["series_size_MB"] = self.index["series_size_MB"].astype(float)
         self.collection_summary = self.index.groupby("collection_id").agg(
             {"Modality": pd.Series.unique, "series_size_MB": "sum"}