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