Prefer decimal

personal_data/fetchers/partisia_blockchain.py

@@ -83,14 +83,14 @@ class MpcBalance(Scraper):
             'account.update_time': date,
         }
 
-        data_point['balance.MPC'] = str(Decimal(account_data['mpcTokens']) / 1000)
+        data_point['balance.MPC'] = Decimal(account_data['mpcTokens']) / 1000
 
         for coin_idx, amount_data in enumerate(account_data['accountCoins']):
             coin_data = coins[coin_idx]
             byoc_balance = Decimal(amount_data['balance'])
             denominator = Decimal(coin_data['conversionRate']['denominator'])
             native_balance = byoc_balance / denominator
-            data_point['balance.' + coin_data['symbol']] = str(native_balance)
+            data_point['balance.' + coin_data['symbol']] = native_balance
             del coin_idx, coin_data
 
         yield data_point

personal_data/main.py

@@ -2,6 +2,8 @@ import csv
 import datetime
 import io
 import logging
+import decimal
+from decimal import Decimal
 
 import requests
 import requests_cache
@@ -40,7 +42,7 @@ logger.setLevel('INFO')
 def try_value(fn, s: str) -> object:
     try:
         return fn(s)
-    except ValueError as e:
+    except (ValueError, decimal.InvalidOperation):
         return None
 
 
@@ -48,9 +50,7 @@ def to_value(s: str) -> object:
     s = s.strip()
     if len(s) == 0:
         return None
-    if (v := try_value(int, s)) is not None:
-        return v
-    if (v := try_value(float, s)) is not None:
+    if (v := try_value(Decimal, s)) is not None:
         return v
     if v := try_value(datetime.date.fromisoformat, s):
         return v

test/test_parsing.py

@@ -1,5 +1,6 @@
 import datetime
 
+from decimal import Decimal
 import pytest
 
 from personal_data.main import to_value
@@ -14,9 +15,9 @@ PARSE_MAPPINGS = [
         '0003791e9f5f3691b8bbbe0d12a7ae9c3f2e89db38',
     ),
     ('', None),
-    ('0', 0),
-    ('200', 200),
-    ('52.5474', 52.5474),
+    ('0', Decimal(0)),
+    ('200', Decimal(200)),
+    ('52.5474', Decimal('52.5474')),
     ('true', True),
     ('True', True),
     ('TRUE', True),