From 522e1a551741b9c6289c44eade91d77036a56264 Mon Sep 17 00:00:00 2001
From: goulustis <cnimaiv@gmail.com>
Date: Fri, 10 Oct 2025 16:28:50 +0800
Subject: [PATCH] add config class

---
 lang_agent/config.py | 115 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 lang_agent/config.py

diff --git a/lang_agent/config.py b/lang_agent/config.py
new file mode 100644
index 0000000..2fda88b
--- /dev/null
+++ b/lang_agent/config.py
@@ -0,0 +1,115 @@
+from dataclasses import dataclass, is_dataclass, fields, MISSING
+from typing import Any, Tuple, Type
+import yaml
+from pathlib import Path
+import os
+
+from loguru import logger
+
+## base classes taken from nerfstudio
+# Pretty printing class
+class PrintableConfig:
+    """Printable Config defining str function"""
+
+    def __str__(self):
+        lines = [self.__class__.__name__ + ":"]
+        for key, val in vars(self).items():
+
+            if key.endswith("_secret") or ("key" in key):
+                val = "****"
+                
+            if isinstance(val, Tuple):
+                flattened_val = "["
+                for item in val:
+                    flattened_val += str(item) + "\n"
+                flattened_val = flattened_val.rstrip("\n")
+                val = flattened_val + "]"
+            lines += f"{key}: {str(val)}".split("\n")
+        return "\n"  + "\n    ".join(lines)
+
+
+# Base instantiate configs
+@dataclass
+class InstantiateConfig(PrintableConfig):
+    """Config class for instantiating an the class specified in the _target attribute."""
+
+    _target: Type
+
+    def setup(self, **kwargs) -> Any:
+        """Returns the instantiated object using the config."""
+        return self._target(self, **kwargs)
+    
+    def save_config(self, filename: str) -> None:
+        """Save the config to a YAML file."""
+        with open(filename, 'w') as f:
+            yaml.dump(self, f)
+        logger.info(f"[yellow]config saved to: {filename}[/yellow]")
+
+
+@dataclass
+class LiveConfig(InstantiateConfig):
+    key_id: str = None
+    """alpaca key id"""
+
+    key_secret: str = None
+    """alpaca secret"""
+
+    paper: bool = True
+    """is paper trading or not"""
+
+    def __post_init__(self):
+        if self.key_id is None:
+            from dotenv import load_dotenv
+            load_dotenv()
+            
+            self.key_id = os.getenv("ALPACA_KEY_ID")
+            self.key_secret = os.getenv("ALPACA_KEY_SECRET")
+
+            assert self.key_id is not None, "alpaca key id required!"
+            assert self.key_secret is not None, "alpaca key secret required!"
+
+            
+
+def load_config(filename: str, inp_conf = None) -> InstantiateConfig:
+    """load and overwrite config from file"""
+    config = yaml.load(Path(filename).read_text(), Loader=yaml.Loader)
+
+    config = ovewrite_config(config, inp_conf) if inp_conf is not None else config
+    return config
+
+def is_default(instance, field_):
+    """
+    Check if the value of a field in a dataclass instance is the default value.
+    """
+    value = getattr(instance, field_.name)
+
+    if field_.default is not MISSING:
+        # Compare with default value
+        return value == field_.default
+    elif field_.default_factory is not MISSING:
+        # Compare with value generated by the default factory
+        return value == field_.default_factory()
+    else:
+        # No default value specified
+        return False
+
+def ovewrite_config(loaded_conf, inp_conf):
+    """for non-default values in inp_conf, overwrite the corresponding values in loaded_conf"""
+    if not (is_dataclass(loaded_conf) and is_dataclass(inp_conf)):
+        return loaded_conf
+
+    for field_ in fields(loaded_conf):
+        field_name = field_.name
+        # if field_name in inp_conf:
+        current_value = getattr(inp_conf, field_name)
+        new_value = getattr(inp_conf, field_name) #inp_conf[field_name]
+
+        if is_dataclass(current_value):
+            # Recurse for nested dataclasses
+            merged_value = ovewrite_config(current_value, new_value)
+            setattr(loaded_conf, field_name, merged_value)
+        elif not is_default(inp_conf, field_):
+            # Overwrite only if the current value is not default
+            setattr(loaded_conf, field_name, new_value)
+
+    return loaded_conf