Manager System

class AstroidManager:
    """Central manager for astroid AST trees."""
    
    def __init__(self) -> None:
        """Initialize the manager with default settings."""
    
    def ast_from_file(self, filepath: str, modname: str | None = None, fallback: bool = True, source: bool = False) -> Module:
        """
        Build astroid tree from a Python file.
        
        Parameters:
        - filepath: Path to the Python file
        - modname: Module name (defaults to filename)
        - fallback: Try alternative loading methods on failure
        - source: Get source code instead of compiled module
        
        Returns:
        Module node representing the file
        
        Raises:
        AstroidBuildingError: If file cannot be loaded or parsed
        """
    
    def ast_from_string(self, data: str, modname: str = "", filepath: str | None = None) -> Module:
        """
        Build astroid tree from source string.
        
        Parameters:
        - data: Python source code
        - modname: Name for the module
        - filepath: Optional file path for error reporting
        
        Returns:
        Module node representing the source
        
        Raises:
        AstroidSyntaxError: If source contains syntax errors
        """
    
    def ast_from_module_name(self, modname: str | None, context_file: str | None = None, use_cache: bool = True) -> Module:
        """
        Build astroid tree from module name.
        
        Parameters:
        - modname: Fully qualified module name
        - context_file: File requesting the module (for relative imports)
        - use_cache: Whether to use cached version if available
        
        Returns:
        Module node for the imported module
        
        Raises:
        AstroidImportError: If module cannot be imported
        """
    
    def ast_from_module(self, module: Any, modname: str | None = None) -> Module:
        """
        Build astroid tree from live Python module.
        
        Parameters:
        - module: Python module object
        - modname: Name for the astroid module
        
        Returns:
        Module node representing the live module
        
        Raises:
        AstroidBuildingError: If module cannot be introspected
        """
    
    def ast_from_class(self, klass: type, modname: str | None = None) -> Module:
        """
        Build astroid tree from a Python class.
        
        Parameters:
        - klass: Python class object
        - modname: Module name for the generated tree
        
        Returns:
        Module containing the class definition
        
        Raises:
        AstroidBuildingError: If class cannot be introspected
        """

class AstroidManager:
    # Configuration properties
    always_load_extensions: bool
    """Whether to always load brain extensions."""
    
    optimize_ast: bool
    """Enable AST optimization during building."""
    
    max_inferable_values: int
    """Maximum number of values to infer for sequences."""
    
    prefer_stubs: bool
    """Prefer .pyi stub files over .py files."""
    
    # Cache management
    def clear_cache(self) -> None:
        """Clear all cached AST trees."""
    
    def cache_size(self) -> int:
        """Get number of cached modules."""
    
    # Transform system
    def register_transform(self, node_class: type[NodeNG], transform: Callable, predicate: Callable | None = None) -> None:
        """
        Register an AST transform function.
        
        Parameters:
        - node_class: Node class to transform
        - transform: Transform function
        - predicate: Optional condition for applying transform
        """
    
    def unregister_transform(self, node_class: type[NodeNG], transform: Callable, predicate: Callable | None = None) -> None:
        """Unregister a previously registered transform."""
    
    # Import hooks
    def register_failed_import_hook(self, hook: Callable) -> None:
        """Register hook for handling failed imports."""
    
    def unregister_failed_import_hook(self, hook: Callable) -> None:
        """Unregister a failed import hook."""

MANAGER: AstroidManager
"""Global singleton manager instance."""

class TreeRebuilder:
    """Rebuilds Python AST as astroid AST."""
    
    def __init__(self, manager: AstroidManager) -> None:
        """Initialize with manager instance."""
    
    def visit_module(self, node: ast.Module, parent: NodeNG) -> Module:
        """Convert ast.Module to astroid.Module."""

import astroid

# Get the global manager
manager = astroid.MANAGER

# Load module from file
try:
    module = manager.ast_from_file('mymodule.py')
    print(f"Loaded module: {module.name}")
except astroid.AstroidBuildingError as e:
    print(f"Failed to load: {e}")

# Load module by name
try:
    os_module = manager.ast_from_module_name('os')
    print(f"OS module functions: {len(os_module.keys())}")
except astroid.AstroidImportError as e:
    print(f"Import failed: {e}")

import astroid

manager = astroid.MANAGER

# First load - builds and caches
module1 = manager.ast_from_module_name('sys')

# Second load - uses cache
module2 = manager.ast_from_module_name('sys')

print(f"Same instance: {module1 is module2}")  # True

# Clear cache if needed
manager.clear_cache()
print(f"Cache size: {manager.cache_size()}")  # 0

import astroid
from astroid import nodes

def remove_pass_statements(node):
    """Transform to remove pass statements."""
    if isinstance(node, nodes.Pass):
        return None  # Remove the node
    return node

# Register transform
astroid.MANAGER.register_transform(nodes.Pass, remove_pass_statements)

# Parse code with pass statements
code = '''
def func():
    pass  # This will be removed
    return 42
'''

module = astroid.parse(code)
# Pass statement will be removed from the AST

import astroid

def handle_failed_import(modname):
    """Handle modules that can't be imported."""
    if modname == 'missing_module':
        # Create a dummy module
        return astroid.parse('# Dummy module', modname)
    return None

# Register the hook
astroid.MANAGER.register_failed_import_hook(handle_failed_import)

# Now imports of 'missing_module' will use the dummy
try:
    module = astroid.MANAGER.ast_from_module_name('missing_module')
    print("Got dummy module")
except astroid.AstroidImportError:
    print("Import still failed")

import astroid

manager = astroid.MANAGER

# Configure manager behavior
manager.optimize_ast = True
manager.max_inferable_values = 100
manager.prefer_stubs = True

# Load with brain extensions
manager.always_load_extensions = True
module = manager.ast_from_module_name('requests')

import astroid

class CustomModuleLoader:
    def load_module(self, modname):
        # Custom loading logic
        return astroid.parse(f'# Custom module {modname}', modname)

# Integration with manager requires modifying the import system

import astroid

# Optimize for performance
manager = astroid.MANAGER
manager.optimize_ast = True
manager.max_inferable_values = 50  # Limit inference depth

# Bulk loading with caching
modules = []
for name in ['os', 'sys', 'json', 'collections']:
    modules.append(manager.ast_from_module_name(name))

print(f"Cached {manager.cache_size()} modules")