import copy from io import StringIO from collections.abc import Iterable import abc from typing import Optional, Union, Dict, Any, Type, TypeVar import numpy as np import yaml try: from yaml import CSafeLoader as SafeLoader from yaml import CSafeDumper as SafeDumper except ImportError: from yaml import SafeLoader # type: ignore from yaml import SafeDumper # type: ignore from ._typehints import FileHandle from . import Rotation from . import util MyType = TypeVar('MyType', bound='Config') class NiceDumper(SafeDumper): """Make YAML readable for humans.""" def write_line_break(self, data: Optional[str] = None): super().write_line_break(data) # type: ignore if len(self.indents) == 1: # type: ignore super().write_line_break() # type: ignore def increase_indent(self, flow: bool = False, indentless: bool = False): return super().increase_indent(flow, False) # type: ignore def represent_data(self, data: Any): """Cast Config objects and its subclasses to dict.""" if isinstance(data, dict) and type(data) != dict: return self.represent_data(dict(data)) if isinstance(data, np.ndarray): return self.represent_data(data.tolist()) if isinstance(data, Rotation): return self.represent_data(data.quaternion.tolist()) if hasattr(data, 'dtype'): return self.represent_data(data.item()) return super().represent_data(data) def ignore_aliases(self, data: Any) -> bool: """Do not use references to existing objects.""" return True class Config(dict): """YAML-based configuration.""" def __init__(self, yml: Union[None, str, Dict[str, Any]] = None, **kwargs): """Initialize from YAML, dict, or key=value pairs.""" if isinstance(yml,str): kwargs.update(yaml.load(yml, Loader=SafeLoader)) elif isinstance(yml,dict): kwargs.update(yml) super().__init__(**kwargs) def __repr__(self) -> str: """ Return repr(self). Show as in file. """ output = StringIO() self.save(output) output.seek(0) return ''.join(output.readlines()) def __copy__(self: MyType) -> MyType: """ Return deepcopy(self). Create deep copy. """ return copy.deepcopy(self) copy = __copy__ def __or__(self: MyType, other) -> MyType: """ Return self|other. Update configuration with contents of other. Parameters ---------- other : damask.Config or dict Key-value pairs that update self. Returns ------- updated : damask.Config Updated configuration. Note ---- This functionality is a backport for Python 3.8 """ duplicate = self.copy() duplicate.update(other) return duplicate def __ior__(self: MyType, other) -> MyType: """ Return self|=other. Update configuration with contents of other (in-place). """ return self.__or__(other) def delete(self: MyType, keys: Union[Iterable, str]) -> MyType: """ Remove configuration keys. Parameters ---------- keys : iterable or scalar Label of the key(s) to remove. Returns ------- updated : damask.Config Updated configuration. """ duplicate = self.copy() for k in keys if isinstance(keys, Iterable) and not isinstance(keys, str) else [keys]: del duplicate[k] return duplicate @classmethod def load(cls: Type[MyType], fname: FileHandle) -> MyType: """ Load from yaml file. Parameters ---------- fname : file, str, or pathlib.Path Filename or file for writing. Returns ------- loaded : damask.Config Configuration from file. """ return cls(yaml.load(util.open_text(fname), Loader=SafeLoader)) def save(self, fname: FileHandle, **kwargs): """ Save to yaml file. Parameters ---------- fname : file, str, or pathlib.Path Filename or file for writing. **kwargs : dict Keyword arguments parsed to yaml.dump. """ if 'width' not in kwargs: kwargs['width'] = 256 if 'default_flow_style' not in kwargs: kwargs['default_flow_style'] = None if 'sort_keys' not in kwargs: kwargs['sort_keys'] = False fhandle = util.open_text(fname,'w') try: fhandle.write(yaml.dump(self,Dumper=NiceDumper,**kwargs)) except TypeError: # compatibility with old pyyaml del kwargs['sort_keys'] fhandle.write(yaml.dump(self,Dumper=NiceDumper,**kwargs)) @property @abc.abstractmethod def is_complete(self): """Check for completeness.""" raise NotImplementedError @property @abc.abstractmethod def is_valid(self): """Check for valid file layout.""" raise NotImplementedError