Spaces:
Sleeping
Sleeping
File size: 5,534 Bytes
bb6012a |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 |
# -----------------------------------------------------------------------------
# Functions for parsing args
# -----------------------------------------------------------------------------
import copy
import os
from ast import literal_eval
import yaml
class CfgNode(dict):
"""
CfgNode represents an internal node in the configuration tree. It's a simple
dict-like container that allows for attribute-based access to keys.
"""
def __init__(self, init_dict=None, key_list=None, new_allowed=False):
# Recursively convert nested dictionaries in init_dict into CfgNodes
init_dict = {} if init_dict is None else init_dict
key_list = [] if key_list is None else key_list
for k, v in init_dict.items():
if type(v) is dict:
# Convert dict to CfgNode
init_dict[k] = CfgNode(v, key_list=key_list + [k])
super(CfgNode, self).__init__(init_dict)
def __getattr__(self, name):
if name in self:
return self[name]
else:
raise AttributeError(name)
def __setattr__(self, name, value):
self[name] = value
def __str__(self):
def _indent(s_, num_spaces):
s = s_.split("\n")
if len(s) == 1:
return s_
first = s.pop(0)
s = [(num_spaces * " ") + line for line in s]
s = "\n".join(s)
s = first + "\n" + s
return s
r = ""
s = []
for k, v in sorted(self.items()):
seperator = "\n" if isinstance(v, CfgNode) else " "
attr_str = "{}:{}{}".format(str(k), seperator, str(v))
attr_str = _indent(attr_str, 2)
s.append(attr_str)
r += "\n".join(s)
return r
def __repr__(self):
return "{}({})".format(self.__class__.__name__,
super(CfgNode, self).__repr__())
def load_cfg_from_cfg_file(file):
cfg = {}
assert os.path.isfile(file) and file.endswith('.yaml'), \
'{} is not a yaml file'.format(file)
with open(file, 'r') as f:
cfg_from_file = yaml.safe_load(f)
for key in cfg_from_file:
for k, v in cfg_from_file[key].items():
cfg[k] = v
cfg = CfgNode(cfg)
return cfg
def merge_cfg_from_list(cfg, cfg_list):
new_cfg = copy.deepcopy(cfg)
assert len(cfg_list) % 2 == 0
for full_key, v in zip(cfg_list[0::2], cfg_list[1::2]):
subkey = full_key.split('.')[-1]
assert subkey in cfg, 'Non-existent key: {}'.format(full_key)
value = _decode_cfg_value(v)
value = _check_and_coerce_cfg_value_type(value, cfg[subkey], subkey,
full_key)
setattr(new_cfg, subkey, value)
return new_cfg
def _decode_cfg_value(v):
"""Decodes a raw config value (e.g., from a yaml config files or command
line argument) into a Python object.
"""
# All remaining processing is only applied to strings
if not isinstance(v, str):
return v
# Try to interpret `v` as a:
# string, number, tuple, list, dict, boolean, or None
try:
v = literal_eval(v)
# 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 v
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:
return True, to_type(replacement)
else:
return False, None
# Conditionally casts
# list <-> tuple
casts = [(tuple, list), (list, tuple)]
# 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
raise ValueError(
"Type mismatch ({} vs. {}) with values ({} vs. {}) for config "
"key: {}".format(original_type, replacement_type, original,
replacement, full_key))
|