Use standalone TraverserVisitor to use compiled mypy version

dora/__main__.py

@@ -33,7 +33,7 @@ def main() -> None:
 
     for path in args.paths:
         if not os.path.exists(path):
-            parser.error(f'The path "{path}" does not exist.')
+            parser.error('The path "{path}" does not exist.'.format(path=path))
 
     try:
         for search_result in search(args.paths, args.type_expression):

dora/ansi.py

@@ -0,0 +1,43 @@
+"""ANSI colors utils."""
+
+
+from enum import Enum
+
+
+class Color(Enum):
+    """ANSI color codes."""
+
+    black = 0
+    red = 1
+    green = 2
+    yellow = 3
+    blue = 4
+    purple = 5
+    cyan = 6
+    white = 7
+
+
+def bg(color: Color, text: str) -> str:
+    """Add background color to the text.
+
+    Args:
+        color: Color of the background.
+        text: Text to color.
+
+    Returns:
+        Text wrapped with ANSI background color and color reset.
+    """
+    return f'\x1b[4{color.value}m{text}\x1b[0m'
+
+
+def fg(color: Color, text: str) -> str:
+    """Add foreground color to the text.
+
+    Args:
+        color: Color of the foreground.
+        text: Text to color.
+
+    Returns:
+        Text wrapped with ANSI foreground color and color reset.
+    """
+    return f'\x1b[3{color.value}m{text}\x1b[0m'

dora/mypy_legacy/__init__.py

@@ -0,0 +1 @@
+"""This package contains the workarounds to use some internal mypy features."""