587 lines
21 KiB
Python
587 lines
21 KiB
Python
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# ---------------------------------------------------------------
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# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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#
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# This file has been modified from a file in the following repo
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# (released under the Apache License 2.0).
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#
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# Source:
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# https://github.com/rbgirshick/yacs/blob/master/yacs/config.py
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#
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# The license for the original version of this file can be
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# found in
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# http://www.apache.org/licenses/LICENSE-2.0
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# The modifications
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# to this file are subject to the NVIDIA Source Code License for
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# LION located at the root directory.
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# ---------------------------------------------------------------
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"""YACS -- Yet Another Configuration System is designed to be a simple
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configuration management system for academic and industrial research
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projects.
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See README.md for usage and examples.
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"""
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# this code is modified from https://github.com/rbgirshick/yacs/blob/master/yacs/config.py
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import copy
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import io
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# import logging
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from loguru import logger
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import os
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import sys
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from ast import literal_eval
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import yaml
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# Flag for py2 and py3 compatibility to use when separate code paths are necessary
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# When _PY2 is False, we assume Python 3 is in use
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_PY2 = sys.version_info.major == 2
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# Filename extensions for loading configs from files
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_YAML_EXTS = {"", ".yaml", ".yml"}
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_PY_EXTS = {".py"}
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# py2 and py3 compatibility for checking file object type
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# We simply use this to infer py2 vs py3
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if _PY2:
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_FILE_TYPES = (file, io.IOBase)
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else:
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_FILE_TYPES = (io.IOBase, )
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# CfgNodes can only contain a limited set of valid types
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_VALID_TYPES = {tuple, list, str, int, float, bool}
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# py2 allow for str and unicode
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if _PY2:
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_VALID_TYPES = _VALID_TYPES.union({unicode}) # noqa: F821
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# Utilities for importing modules from file paths
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if _PY2:
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# imp is available in both py2 and py3 for now, but is deprecated in py3
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import imp
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else:
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import importlib.util
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# logger = logging.getLogger(__name__)
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class CfgNode(dict):
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"""
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CfgNode represents an internal node in the configuration tree. It's a simple
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dict-like container that allows for attribute-based access to keys.
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"""
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IMMUTABLE = "__immutable__"
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DEPRECATED_KEYS = "__deprecated_keys__"
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RENAMED_KEYS = "__renamed_keys__"
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NEW_ALLOWED = "__new_allowed__"
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def __init__(self, init_dict=None, key_list=None, new_allowed=False):
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"""
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Args:
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init_dict (dict): the possibly-nested dictionary to initailize the CfgNode.
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key_list (list[str]): a list of names which index this CfgNode from the root.
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Currently only used for logging purposes.
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new_allowed (bool): whether adding new key is allowed when merging with
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other configs.
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"""
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# Recursively convert nested dictionaries in init_dict into CfgNodes
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init_dict = {} if init_dict is None else init_dict
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key_list = [] if key_list is None else key_list
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init_dict = self._create_config_tree_from_dict(init_dict, key_list)
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super(CfgNode, self).__init__(init_dict)
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# Manage if the CfgNode is frozen or not
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self.__dict__[CfgNode.IMMUTABLE] = False
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# Deprecated options
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# If an option is removed from the code and you don't want to break existing
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# yaml configs, you can add the full config key as a string to the set below.
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self.__dict__[CfgNode.DEPRECATED_KEYS] = set()
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# Renamed options
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# If you rename a config option, record the mapping from the old name to the new
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# name in the dictionary below. Optionally, if the type also changed, you can
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# make the value a tuple that specifies first the renamed key and then
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# instructions for how to edit the config file.
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self.__dict__[CfgNode.RENAMED_KEYS] = {
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# 'EXAMPLE.OLD.KEY': 'EXAMPLE.NEW.KEY', # Dummy example to follow
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# 'EXAMPLE.OLD.KEY': ( # A more complex example to follow
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# 'EXAMPLE.NEW.KEY',
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# "Also convert to a tuple, e.g., 'foo' -> ('foo',) or "
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# + "'foo:bar' -> ('foo', 'bar')"
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# ),
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}
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# Allow new attributes after initialisation
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self.__dict__[CfgNode.NEW_ALLOWED] = new_allowed
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@classmethod
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def _create_config_tree_from_dict(cls, dic, key_list):
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"""
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Create a configuration tree using the given dict.
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Any dict-like objects inside dict will be treated as a new CfgNode.
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Args:
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dic (dict):
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key_list (list[str]): a list of names which index this CfgNode from the root.
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Currently only used for logging purposes.
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"""
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dic = copy.deepcopy(dic)
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for k, v in dic.items():
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if isinstance(v, dict):
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# Convert dict to CfgNode
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dic[k] = cls(v, key_list=key_list + [k])
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else:
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# Check for valid leaf type or nested CfgNode
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_assert_with_logging(
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_valid_type(v, allow_cfg_node=False),
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"Key {} with value {} is not a valid type; valid types: {}"
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.format(".".join(key_list + [str(k)]), type(v),
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_VALID_TYPES),
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)
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return dic
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def __getattr__(self, name):
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if name in self:
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return self[name]
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else:
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raise AttributeError(name)
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def __setattr__(self, name, value):
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if self.is_frozen():
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raise AttributeError(
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"Attempted to set {} to {}, but CfgNode is immutable".format(
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name, value))
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_assert_with_logging(
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name not in self.__dict__,
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"Invalid attempt to modify internal CfgNode state: {}".format(
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name),
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)
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_assert_with_logging(
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_valid_type(value, allow_cfg_node=True),
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"Invalid type {} for key {}; valid types = {}".format(
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type(value), name, _VALID_TYPES),
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)
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self[name] = value
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def __str__(self):
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def _indent(s_, num_spaces):
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s = s_.split("\n")
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if len(s) == 1:
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return s_
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first = s.pop(0)
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s = [(num_spaces * " ") + line for line in s]
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s = "\n".join(s)
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s = first + "\n" + s
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return s
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r = ""
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s = []
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for k, v in sorted(self.items()):
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seperator = "\n" if isinstance(v, CfgNode) else " "
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attr_str = "{}:{}{}".format(str(k), seperator, str(v))
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attr_str = _indent(attr_str, 2)
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s.append(attr_str)
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r += "\n".join(s)
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return r
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def __repr__(self):
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return "{}({})".format(self.__class__.__name__,
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super(CfgNode, self).__repr__())
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def to_dict(self, **kwargs):
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"""Dump to a string."""
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def convert_to_dict(cfg_node, key_list):
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if not isinstance(cfg_node, CfgNode):
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_assert_with_logging(
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_valid_type(cfg_node),
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"Key {} with value {} is not a valid type; valid types: {}"
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.format(".".join(key_list), type(cfg_node), _VALID_TYPES),
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)
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return cfg_node
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else:
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cfg_dict = dict(cfg_node)
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for k, v in cfg_dict.items():
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cfg_dict[k] = convert_to_dict(v, key_list + [k])
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return cfg_dict
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self_as_dict = convert_to_dict(self, [])
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return self_as_dict
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def dump(self, **kwargs):
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"""Dump to a string."""
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def convert_to_dict(cfg_node, key_list):
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if not isinstance(cfg_node, CfgNode):
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_assert_with_logging(
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_valid_type(cfg_node),
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"Key {} with value {} is not a valid type; valid types: {}"
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.format(".".join(key_list), type(cfg_node), _VALID_TYPES),
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)
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return cfg_node
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else:
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cfg_dict = dict(cfg_node)
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for k, v in cfg_dict.items():
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cfg_dict[k] = convert_to_dict(v, key_list + [k])
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return cfg_dict
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self_as_dict = convert_to_dict(self, [])
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return yaml.safe_dump(self_as_dict, **kwargs)
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def merge_from_file(self, cfg_filename):
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"""Load a yaml config file and merge it this CfgNode."""
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with open(cfg_filename, "r") as f:
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cfg = self.load_cfg(f)
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self.merge_from_other_cfg(cfg)
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def merge_from_other_cfg(self, cfg_other):
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"""Merge `cfg_other` into this CfgNode."""
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_merge_a_into_b(cfg_other, self, self, [])
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def merge_from_list(self, cfg_list):
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"""Merge config (keys, values) in a list (e.g., from command line) into
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this CfgNode. For example, `cfg_list = ['FOO.BAR', 0.5]`.
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"""
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_assert_with_logging(
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len(cfg_list) % 2 == 0,
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"Override list has odd length: {}; it must be a list of pairs".
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format(cfg_list),
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)
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root = self
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for full_key, v in zip(cfg_list[0::2], cfg_list[1::2]):
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if root.key_is_deprecated(full_key):
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continue
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if root.key_is_renamed(full_key):
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root.raise_key_rename_error(full_key)
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key_list = full_key.split(".")
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d = self
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for subkey in key_list[:-1]:
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_assert_with_logging(subkey in d,
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"Non-existent key: {}".format(full_key))
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d = d[subkey]
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subkey = key_list[-1]
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_assert_with_logging(subkey in d,
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"Non-existent key: {}".format(full_key))
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value = self._decode_cfg_value(v)
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value = _check_and_coerce_cfg_value_type(value, d[subkey], subkey,
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full_key)
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d[subkey] = value
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def freeze(self):
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"""Make this CfgNode and all of its children immutable."""
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self._immutable(True)
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def defrost(self):
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"""Make this CfgNode and all of its children mutable."""
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self._immutable(False)
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def is_frozen(self):
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"""Return mutability."""
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return self.__dict__[CfgNode.IMMUTABLE]
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def _immutable(self, is_immutable):
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"""Set immutability to is_immutable and recursively apply the setting
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to all nested CfgNodes.
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"""
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self.__dict__[CfgNode.IMMUTABLE] = is_immutable
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# Recursively set immutable state
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for v in self.__dict__.values():
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if isinstance(v, CfgNode):
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v._immutable(is_immutable)
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for v in self.values():
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if isinstance(v, CfgNode):
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v._immutable(is_immutable)
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def clone(self):
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"""Recursively copy this CfgNode."""
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return copy.deepcopy(self)
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def register_deprecated_key(self, key):
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"""Register key (e.g. `FOO.BAR`) a deprecated option. When merging deprecated
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keys a warning is generated and the key is ignored.
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"""
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_assert_with_logging(
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key not in self.__dict__[CfgNode.DEPRECATED_KEYS],
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"key {} is already registered as a deprecated key".format(key),
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)
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self.__dict__[CfgNode.DEPRECATED_KEYS].add(key)
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def register_renamed_key(self, old_name, new_name, message=None):
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"""Register a key as having been renamed from `old_name` to `new_name`.
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When merging a renamed key, an exception is thrown alerting to user to
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the fact that the key has been renamed.
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"""
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_assert_with_logging(
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old_name not in self.__dict__[CfgNode.RENAMED_KEYS],
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"key {} is already registered as a renamed cfg key".format(
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old_name),
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)
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value = new_name
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if message:
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value = (new_name, message)
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self.__dict__[CfgNode.RENAMED_KEYS][old_name] = value
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def key_is_deprecated(self, full_key):
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"""Test if a key is deprecated."""
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if full_key in self.__dict__[CfgNode.DEPRECATED_KEYS]:
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logger.warning(
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"Deprecated config key (ignoring): {}".format(full_key))
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return True
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return False
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def key_is_renamed(self, full_key):
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"""Test if a key is renamed."""
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return full_key in self.__dict__[CfgNode.RENAMED_KEYS]
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def raise_key_rename_error(self, full_key):
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new_key = self.__dict__[CfgNode.RENAMED_KEYS][full_key]
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if isinstance(new_key, tuple):
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msg = " Note: " + new_key[1]
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new_key = new_key[0]
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else:
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msg = ""
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raise KeyError(
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"Key {} was renamed to {}; please update your config.{}".format(
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full_key, new_key, msg))
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def is_new_allowed(self):
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return self.__dict__[CfgNode.NEW_ALLOWED]
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@classmethod
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def load_cfg(cls, cfg_file_obj_or_str):
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"""
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Load a cfg.
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Args:
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cfg_file_obj_or_str (str or file):
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Supports loading from:
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- A file object backed by a YAML file
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- A file object backed by a Python source file that exports an attribute
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"cfg" that is either a dict or a CfgNode
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|
|
- A string that can be parsed as valid YAML
|
||
|
|
"""
|
||
|
|
_assert_with_logging(
|
||
|
|
isinstance(cfg_file_obj_or_str, _FILE_TYPES + (str, )),
|
||
|
|
"Expected first argument to be of type {} or {}, but it was {}".
|
||
|
|
format(_FILE_TYPES, str, type(cfg_file_obj_or_str)),
|
||
|
|
)
|
||
|
|
if isinstance(cfg_file_obj_or_str, str):
|
||
|
|
return cls._load_cfg_from_yaml_str(cfg_file_obj_or_str)
|
||
|
|
elif isinstance(cfg_file_obj_or_str, _FILE_TYPES):
|
||
|
|
return cls._load_cfg_from_file(cfg_file_obj_or_str)
|
||
|
|
else:
|
||
|
|
raise NotImplementedError(
|
||
|
|
"Impossible to reach here (unless there's a bug)")
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _load_cfg_from_file(cls, file_obj):
|
||
|
|
"""Load a config from a YAML file or a Python source file."""
|
||
|
|
_, file_extension = os.path.splitext(file_obj.name)
|
||
|
|
if file_extension in _YAML_EXTS:
|
||
|
|
return cls._load_cfg_from_yaml_str(file_obj.read())
|
||
|
|
elif file_extension in _PY_EXTS:
|
||
|
|
return cls._load_cfg_py_source(file_obj.name)
|
||
|
|
else:
|
||
|
|
raise Exception(
|
||
|
|
"Attempt to load from an unsupported file type {}; "
|
||
|
|
"only {} are supported".format(file_obj,
|
||
|
|
_YAML_EXTS.union(_PY_EXTS)))
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _load_cfg_from_yaml_str(cls, str_obj):
|
||
|
|
"""Load a config from a YAML string encoding."""
|
||
|
|
cfg_as_dict = yaml.safe_load(str_obj)
|
||
|
|
return cls(cfg_as_dict)
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _load_cfg_py_source(cls, filename):
|
||
|
|
"""Load a config from a Python source file."""
|
||
|
|
module = _load_module_from_file("yacs.config.override", filename)
|
||
|
|
_assert_with_logging(
|
||
|
|
hasattr(module, "cfg"),
|
||
|
|
"Python module from file {} must have 'cfg' attr".format(filename),
|
||
|
|
)
|
||
|
|
VALID_ATTR_TYPES = {dict, CfgNode}
|
||
|
|
_assert_with_logging(
|
||
|
|
type(module.cfg) in VALID_ATTR_TYPES,
|
||
|
|
"Imported module 'cfg' attr must be in {} but is {} instead".
|
||
|
|
format(VALID_ATTR_TYPES, type(module.cfg)),
|
||
|
|
)
|
||
|
|
return cls(module.cfg)
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _decode_cfg_value(cls, value):
|
||
|
|
"""
|
||
|
|
Decodes a raw config value (e.g., from a yaml config files or command
|
||
|
|
line argument) into a Python object.
|
||
|
|
|
||
|
|
If the value is a dict, it will be interpreted as a new CfgNode.
|
||
|
|
If the value is a str, it will be evaluated as literals.
|
||
|
|
Otherwise it is returned as-is.
|
||
|
|
"""
|
||
|
|
# Configs parsed from raw yaml will contain dictionary keys that need to be
|
||
|
|
# converted to CfgNode objects
|
||
|
|
if isinstance(value, dict):
|
||
|
|
return cls(value)
|
||
|
|
# All remaining processing is only applied to strings
|
||
|
|
if not isinstance(value, str):
|
||
|
|
return value
|
||
|
|
# Try to interpret `value` as a:
|
||
|
|
# string, number, tuple, list, dict, boolean, or None
|
||
|
|
try:
|
||
|
|
value = literal_eval(value)
|
||
|
|
# The following two excepts allow v to pass through when it represents a
|
||
|
|
# string.
|
||
|
|
#
|
||
|
|
# Longer explanation:
|
||
|
|
# The type of v is always a string (before calling literal_eval), but
|
||
|
|
# sometimes it *represents* a string and other times a data structure, like
|
||
|
|
# a list. In the case that v represents a string, what we got back from the
|
||
|
|
# yaml parser is 'foo' *without quotes* (so, not '"foo"'). literal_eval is
|
||
|
|
# ok with '"foo"', but will raise a ValueError if given 'foo'. In other
|
||
|
|
# cases, like paths (v = 'foo/bar' and not v = '"foo/bar"'), literal_eval
|
||
|
|
# will raise a SyntaxError.
|
||
|
|
except ValueError:
|
||
|
|
pass
|
||
|
|
except SyntaxError:
|
||
|
|
pass
|
||
|
|
return value
|
||
|
|
|
||
|
|
|
||
|
|
load_cfg = (CfgNode.load_cfg
|
||
|
|
) # keep this function in global scope for backward compatibility
|
||
|
|
|
||
|
|
|
||
|
|
def _valid_type(value, allow_cfg_node=False):
|
||
|
|
return (type(value) in _VALID_TYPES) or (allow_cfg_node
|
||
|
|
and isinstance(value, CfgNode))
|
||
|
|
|
||
|
|
|
||
|
|
def _merge_a_into_b(a, b, root, key_list):
|
||
|
|
"""Merge config dictionary a into config dictionary b, clobbering the
|
||
|
|
options in b whenever they are also specified in a.
|
||
|
|
"""
|
||
|
|
_assert_with_logging(
|
||
|
|
isinstance(a, CfgNode),
|
||
|
|
"`a` (cur type {}) must be an instance of {}".format(type(a), CfgNode),
|
||
|
|
)
|
||
|
|
_assert_with_logging(
|
||
|
|
isinstance(b, CfgNode),
|
||
|
|
"`b` (cur type {}) must be an instance of {}".format(type(b), CfgNode),
|
||
|
|
)
|
||
|
|
|
||
|
|
for k, v_ in a.items():
|
||
|
|
full_key = ".".join(key_list + [k])
|
||
|
|
|
||
|
|
v = copy.deepcopy(v_)
|
||
|
|
v = b._decode_cfg_value(v)
|
||
|
|
|
||
|
|
if k in b:
|
||
|
|
v = _check_and_coerce_cfg_value_type(v, b[k], k, full_key)
|
||
|
|
# Recursively merge dicts
|
||
|
|
if isinstance(v, CfgNode):
|
||
|
|
try:
|
||
|
|
_merge_a_into_b(v, b[k], root, key_list + [k])
|
||
|
|
except BaseException:
|
||
|
|
raise
|
||
|
|
else:
|
||
|
|
b[k] = v
|
||
|
|
elif b.is_new_allowed():
|
||
|
|
b[k] = v
|
||
|
|
else:
|
||
|
|
if root.key_is_deprecated(full_key):
|
||
|
|
continue
|
||
|
|
elif root.key_is_renamed(full_key):
|
||
|
|
root.raise_key_rename_error(full_key)
|
||
|
|
else:
|
||
|
|
raise KeyError("Non-existent config key: {}".format(full_key))
|
||
|
|
|
||
|
|
|
||
|
|
def _check_and_coerce_cfg_value_type(replacement, original, key, full_key):
|
||
|
|
"""Checks that `replacement`, which is intended to replace `original` is of
|
||
|
|
the right type. The type is correct if it matches exactly or is one of a few
|
||
|
|
cases in which the type can be easily coerced.
|
||
|
|
"""
|
||
|
|
original_type = type(original)
|
||
|
|
replacement_type = type(replacement)
|
||
|
|
|
||
|
|
# The types must match (with some exceptions)
|
||
|
|
if replacement_type == original_type:
|
||
|
|
return replacement
|
||
|
|
|
||
|
|
# Cast replacement from from_type to to_type if the replacement and original
|
||
|
|
# types match from_type and to_type
|
||
|
|
def conditional_cast(from_type, to_type):
|
||
|
|
if replacement_type == from_type and original_type == to_type:
|
||
|
|
logger.warning('cast {} to {}', from_type, to_type)
|
||
|
|
return True, to_type(replacement)
|
||
|
|
else:
|
||
|
|
return False, None
|
||
|
|
|
||
|
|
# Conditionally casts
|
||
|
|
# list <-> tuple
|
||
|
|
casts = [(tuple, list), (list, tuple), (bool, int)]
|
||
|
|
# For py2: allow converting from str (bytes) to a unicode string
|
||
|
|
try:
|
||
|
|
casts.append((str, unicode)) # noqa: F821
|
||
|
|
except Exception:
|
||
|
|
pass
|
||
|
|
|
||
|
|
for (from_type, to_type) in casts:
|
||
|
|
converted, converted_value = conditional_cast(from_type, to_type)
|
||
|
|
if converted:
|
||
|
|
return converted_value
|
||
|
|
|
||
|
|
# if original_type == int and replacement_type == bool:
|
||
|
|
# logger.warning(
|
||
|
|
# "Type mismatch ({} vs. {}) with values ({} vs. {}) for config "
|
||
|
|
# "key: {}".format(
|
||
|
|
# original_type, replacement_type, original, replacement, full_key
|
||
|
|
# ))
|
||
|
|
# else:
|
||
|
|
raise ValueError(
|
||
|
|
"Type mismatch ({} vs. {}) with values ({} vs. {}) for config "
|
||
|
|
"key: {}".format(original_type, replacement_type, original,
|
||
|
|
replacement, full_key))
|
||
|
|
|
||
|
|
|
||
|
|
def _assert_with_logging(cond, msg):
|
||
|
|
if not cond:
|
||
|
|
logger.debug(msg)
|
||
|
|
assert cond, msg
|
||
|
|
|
||
|
|
|
||
|
|
def _load_module_from_file(name, filename):
|
||
|
|
if _PY2:
|
||
|
|
module = imp.load_source(name, filename)
|
||
|
|
else:
|
||
|
|
spec = importlib.util.spec_from_file_location(name, filename)
|
||
|
|
module = importlib.util.module_from_spec(spec)
|
||
|
|
spec.loader.exec_module(module)
|
||
|
|
return module
|
||
|
|
|
||
|
|
|
||
|
|
def same_cfg(cfg_node, cfg_other):
|
||
|
|
def flatten_dict(dd, sep='_', pf=''):
|
||
|
|
return {pf+sep+k if pf else k: v for kk, vv in dd.items()
|
||
|
|
for k, v in flatten_dict(vv, sep, kk).items()} \
|
||
|
|
if isinstance(dd, dict) else {pf: dd}
|
||
|
|
|
||
|
|
node_s = flatten_dict(cfg_node)
|
||
|
|
other_s = flatten_dict(cfg_other)
|
||
|
|
k0, k1 = list(node_s.keys()), list(other_s.keys())
|
||
|
|
if sorted(k0) != sorted(k1):
|
||
|
|
print(f'[LEN]: {len(k0)} VS {len(k1)}')
|
||
|
|
k_diff1 = [i for i in k0 if i not in k1]
|
||
|
|
k_diff0 = [i for i in k1 if i not in k0]
|
||
|
|
print(f'[DIFF] keys: {k_diff1}; {k_diff0}')
|
||
|
|
assert (False), 'Diff key'
|
||
|
|
return False
|
||
|
|
for k, v in node_s.items():
|
||
|
|
if k == 'exp_key':
|
||
|
|
continue
|
||
|
|
if other_s[k] != v:
|
||
|
|
msg = f'{k}: {v}; {other_s[k]}'
|
||
|
|
logger.info(msg)
|
||
|
|
assert (False), 'Diff key value ' + msg
|
||
|
|
return False
|
||
|
|
return True
|