fix: metadata

README.md

@@ -7,7 +7,7 @@ dataset_info:
     - name: product/title
       dtype: string
     - name: product/price
-      dtype: float16
+      dtype: string
     - name: review/helpfulness
       dtype: string
     - name: review/helpfulness_ratio
@@ -18,12 +18,11 @@ dataset_info:
       dtype: 
         class_label:
           names:
-            '0': null
-            '1': 1 star
-            '2': 2 stars
-            '3': 3 stars
-            '4': 4 stars
-            '5': 5 stars
+            '0': 1 star
+            '1': 2 stars
+            '2': 3 stars
+            '3': 4 stars
+            '4': 5 stars
     - name: review/time
       dtype: int64
     - name: review/summary

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convert.py

@@ -6,7 +6,9 @@ Usage:
     $ python convert.py
 """
 
+import math
 import os
+import sys
 import gzip
 
 from glob import glob
@@ -51,6 +53,14 @@ CATEGORIES = {
     "Watches.txt.gz": "Watch",  # 68,356 reviews
 }
 
+REVIEW_SCORE = {
+    "1.0": 0,
+    "2.0": 1,
+    "3.0": 2,
+    "4.0": 3,
+    "5.0": 4,
+}
+
 CATEGORIES_LIST = list(CATEGORIES.values())
 
 
@@ -89,8 +99,8 @@ def save_parquet(data, chunk):
 
     df_train, df_test = train_test_split(df, test_size=TEST_SIZE, random_state=42)
 
-    df_train.to_parquet(fname_train)
-    df_test.to_parquet(fname_test)
+    df_train.to_parquet(fname_train, index=False)
+    df_test.to_parquet(fname_test, index=False)
 
 
 def parse_file(filename):
@@ -124,12 +134,10 @@ def clean(entry):
 
     if entry["product/price"] == "unknown":
         entry["product/price"] = None
-    else:
-        entry["product/price"] = float(entry["product/price"])
 
-    entry["review/score"] = int(float(entry["review/score"]))
+    entry["review/score"] = REVIEW_SCORE[entry["review/score"]]
     entry["review/time"] = int(entry["review/time"])
-    entry["product/category"] = CATEGORIES_LIST.index(entry["product/category"])
+    entry["product/category"] = int(CATEGORIES_LIST.index(entry["product/category"]))
 
     numerator, demoninator = entry["review/helpfulness"].split("/")
     numerator = int(numerator)