Apply pylint's linting rules to bfxapi/utils/*.py.

bfxapi/utils/json_encoder.py

@@ -0,0 +1,31 @@
+import json
+from decimal import Decimal
+from datetime import datetime
+
+from typing import Type, List, Dict, Union, Any
+
+JSON = Union[Dict[str, "JSON"], List["JSON"], bool, int, float, str, Type[None]]
+
+def _strip(dictionary: Dict) -> Dict:
+    return { key: value for key, value in dictionary.items() if value is not None }
+
+def _convert_float_to_str(data: JSON) -> JSON:
+    if isinstance(data, float):
+        return format(Decimal(repr(data)), "f")
+    if isinstance(data, list):
+        return [ _convert_float_to_str(sub_data) for sub_data in data ]
+    if isinstance(data, dict):
+        return _strip({ key: _convert_float_to_str(value) for key, value in data.items() })
+    return data
+
+class JSONEncoder(json.JSONEncoder):
+    def encode(self, o: JSON) -> str:
+        return json.JSONEncoder.encode(self, _convert_float_to_str(o))
+
+    def default(self, o: Any) -> Any:
+        if isinstance(o, Decimal):
+            return format(o, "f")
+        if isinstance(o, datetime):
+            return str(o)
+
+        return json.JSONEncoder.default(self, o)