fix 3.8 and 3.9 compatibility

Author: mkrd

dictdatabase/configuration.py

@@ -1,14 +1,21 @@
 from __future__ import annotations
-from dataclasses import dataclass
 
 
 
-@dataclass(slots=True)
 class Confuguration:
-	storage_directory: str = "ddb_storage"
-	indent: int | str | None = "\t"  # eg. "\t" or 4 or None
-	use_compression: bool = False
-	use_orjson: bool = True
+
+	__slots__ = ("storage_directory", "indent", "use_compression", "use_orjson")
+
+	storage_directory: str
+	indent: int | str | None  # eg. "\t" or 4 or None
+	use_compression: bool
+	use_orjson: bool
+
+	def __init__(self, storage_directory="ddb_storage", indent="\t", use_compression=False, use_orjson=True):
+		self.storage_directory = storage_directory
+		self.indent = indent
+		self.use_compression = use_compression
+		self.use_orjson = use_orjson
 
 
 

dictdatabase/io_unsafe.py

@@ -7,7 +7,7 @@
 from . import config, utils, byte_codes, indexing, io_bytes
 
 
-@dataclass(frozen=True, slots=True)
+@dataclass(frozen=True)  # slots=True not supported by python 3.8 and 3.9
 class PartialDict:
 	prefix: bytes
 	key: str
@@ -17,7 +17,7 @@ class PartialDict:
 	suffix: bytes
 
 
-@dataclass(frozen=True, slots=True)
+@dataclass(frozen=True)  # slots=True not supported by python 3.8 and 3.9
 class PartialFileHandle:
 	db_name: str
 	partial_dict: PartialDict