chore: update ascii colors to work with dark mode (#152)

langchain/chains/base.py

@@ -9,7 +9,7 @@ class Chain(BaseModel, ABC):
     """Base interface that all chains should implement."""
 
     verbose: bool = False
-    """Whether to print out the code that was executed."""
+    """Whether to print out response text."""
 
     @property
     @abstractmethod

langchain/input.py

@@ -1,14 +1,19 @@
 """Handle chained inputs."""
 from typing import Dict, List, Optional
 
-_COLOR_MAPPING = {"blue": 51, "yellow": 229, "pink": 219, "green": 85}
+_TEXT_COLOR_MAPPING = {
+    "blue": "36;1",
+    "yellow": "33;1",
+    "pink": "38;5;200",
+    "green": "32;1",
+}
 
 
 def get_color_mapping(
     items: List[str], excluded_colors: Optional[List] = None
 ) -> Dict[str, str]:
     """Get mapping for items to a support color."""
-    colors = list(_COLOR_MAPPING.keys())
+    colors = list(_TEXT_COLOR_MAPPING.keys())
     if excluded_colors is not None:
         colors = [c for c in colors if c not in excluded_colors]
     color_mapping = {item: colors[i % len(colors)] for i, item in enumerate(items)}
@@ -20,8 +25,8 @@ def print_text(text: str, color: Optional[str] = None, end: str = "") -> None:
     if color is None:
         print(text, end=end)
     else:
-        color_str = _COLOR_MAPPING[color]
-        print(f"\u001b[48;5;{color_str}m{text}\x1b[0m", end=end)
+        color_str = _TEXT_COLOR_MAPPING[color]
+        print(f"\u001b[{color_str}m\033[1;3m{text}\u001b[0m", end=end)
 
 
 class ChainedInput:
@@ -29,14 +34,14 @@ class ChainedInput:
 
     def __init__(self, text: str, verbose: bool = False):
         """Initialize with verbose flag and initial text."""
-        self.verbose = verbose
-        if self.verbose:
+        self._verbose = verbose
+        if self._verbose:
             print_text(text, None)
         self._input = text
 
     def add(self, text: str, color: Optional[str] = None) -> None:
         """Add text to input, print if in verbose mode."""
-        if self.verbose:
+        if self._verbose:
             print_text(text, color)
         self._input += text
 

tests/unit_tests/test_input.py

@@ -48,7 +48,7 @@ def test_chained_input_verbose() -> None:
     chained_input.add("baz", color="blue")
     sys.stdout = old_stdout
     output = mystdout.getvalue()
-    assert output == "\x1b[48;5;51mbaz\x1b[0m"
+    assert output == "\x1b[36;1m\x1b[1;3mbaz\x1b[0m"
     assert chained_input.input == "foobarbaz"