added encoding option, docstring and kept format of original file

src/cube_dbt/dbt.py

@@ -2,7 +2,8 @@
 
 from urllib.request import urlopen
 from cube_dbt.model import Model
-
+import locale
+
 class Dbt:
   def __init__(self, manifest: dict) -> None:
     self.manifest = manifest
@@ -13,16 +14,36 @@ def __init__(self, manifest: dict) -> None:
     pass
 
   @staticmethod
-  def from_file(manifest_path: str) -> 'Dbt':
-    with open(manifest_path, 'r') as file:
-      manifest = json.loads(file.read())
-      return Dbt(manifest)
+  def from_file(manifest_path: str, encoding:str = None) -> 'Dbt':
+    """Reads a DBT manifest.json file from local path
+
+    Args:
+        manifest_path (str): The path to the manifest file, read from the top-level directory of the Cube environment
+        encoding (str, optional): Encoding for the manifest.json file. Uses the system locale preferred encoding if not specified.
+
+    Returns:
+        Dbt: Dbt manifest class to interact with in Cube
+    """
+    if encoding is None:
+        encoding = locale.getpreferredencoding()
+    with open(manifest_path, "r", encoding=encoding) as file:
+        manifest = json.loads(file.read())
+        return Dbt(manifest)
 
   @staticmethod
   def from_url(manifest_url: str) -> 'Dbt':
+    """
+        Creates an instance of the Dbt class by loading a JSON manifest from a specified URL.
+
+        Args:
+            manifest_url (str): The URL pointing to the JSON manifest file. This URL should be accessible and the file should be in a valid JSON format.
+
+        Returns:
+            Dbt: An instance of the Dbt class initialized with the manifest loaded from the given URL.
+    """
     with urlopen(manifest_url) as file:
-      manifest = json.loads(file.read())
-      return Dbt(manifest)
+        manifest = json.loads(file.read())
+        return Dbt(manifest)
 
   def filter(self, paths: list[str]=[], tags: list[str]=[], names: list[str]=[]) -> 'Dbt':
     self.paths = paths