feat: add support for grouping separators and precise handling of small numbers in format_number

functions/convert.py

@@ -58,7 +58,7 @@ class Converter:
                 for key in ['terms', 'privacy', 'timestamp']:
                     data.pop(key, None)
 
-                if len(data.get('to')) == 0:
+                if not data.get('to'):
                     raise RuntimeError('Failed to get the exchange rate from DuckDuckGo')
 
                 conv = data.get('to')[0]

main.py

@@ -78,12 +78,12 @@ async def currency(query: types.InlineQuery) -> None:
                             )],
                             query)
 
-    if not conv_currency or not from_currency:
-        return await reply(result_id, [('The currency exchange rate could not be found.', None, None)], query)
-
     conv.from_currency = from_currency.upper()
     conv.conv_currency = conv_currency.upper()
-    await conv.convert()
+    try:
+        await conv.convert()
+    except RuntimeError as e:
+        return await reply(result_id, [('The currency exchange rate could not be determined', None, None)], query)
 
     chart = await create_chart(from_currency, conv_currency)
 

utils/format_number.py

@@ -3,10 +3,12 @@ from decimal import Decimal
 def format_number(number):
     number = Decimal(str(number))
 
-    formatted_integer_part = '{:,.0f}'.format(number).replace(',', ' ')
+    formatted_integer_part = '{:,.0f}'.format(number // 1).replace(',', ' ')
+    fractional_part = f"{number % 1:.30f}".split('.')[1]
 
-    if '.' in str(number):
-        fractional_part = str(number).split('.')[1][:3]
-        return formatted_integer_part + '.' + fractional_part
-    else:
-        return formatted_integer_part
+    if int(fractional_part) == 0:
+        return formatted_integer_part + ''
+    
+    significant_start = next((i for i, char in enumerate(fractional_part) if char != '0'), len(fractional_part))
+    result_fractional = fractional_part[:significant_start + 3]
+    return formatted_integer_part + '.' + result_fractional