/usr/lib/python3/dist-packages/traitlets/config/loader.py is in python3-traitlets 4.3.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 | # encoding: utf-8
"""A simple configuration system."""
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import argparse
import copy
import logging
import os
import re
import sys
import json
from ast import literal_eval
from ipython_genutils.path import filefind
from ipython_genutils import py3compat
from ipython_genutils.encoding import DEFAULT_ENCODING
from six import text_type
from traitlets.traitlets import HasTraits, List, Any
#-----------------------------------------------------------------------------
# Exceptions
#-----------------------------------------------------------------------------
class ConfigError(Exception):
pass
class ConfigLoaderError(ConfigError):
pass
class ConfigFileNotFound(ConfigError):
pass
class ArgumentError(ConfigLoaderError):
pass
#-----------------------------------------------------------------------------
# Argparse fix
#-----------------------------------------------------------------------------
# Unfortunately argparse by default prints help messages to stderr instead of
# stdout. This makes it annoying to capture long help screens at the command
# line, since one must know how to pipe stderr, which many users don't know how
# to do. So we override the print_help method with one that defaults to
# stdout and use our class instead.
class ArgumentParser(argparse.ArgumentParser):
"""Simple argparse subclass that prints help to stdout by default."""
def print_help(self, file=None):
if file is None:
file = sys.stdout
return super(ArgumentParser, self).print_help(file)
print_help.__doc__ = argparse.ArgumentParser.print_help.__doc__
#-----------------------------------------------------------------------------
# Config class for holding config information
#-----------------------------------------------------------------------------
class LazyConfigValue(HasTraits):
"""Proxy object for exposing methods on configurable containers
Exposes:
- append, extend, insert on lists
- update on dicts
- update, add on sets
"""
_value = None
# list methods
_extend = List()
_prepend = List()
def append(self, obj):
self._extend.append(obj)
def extend(self, other):
self._extend.extend(other)
def prepend(self, other):
"""like list.extend, but for the front"""
self._prepend[:0] = other
_inserts = List()
def insert(self, index, other):
if not isinstance(index, int):
raise TypeError("An integer is required")
self._inserts.append((index, other))
# dict methods
# update is used for both dict and set
_update = Any()
def update(self, other):
if self._update is None:
if isinstance(other, dict):
self._update = {}
else:
self._update = set()
self._update.update(other)
# set methods
def add(self, obj):
self.update({obj})
def get_value(self, initial):
"""construct the value from the initial one
after applying any insert / extend / update changes
"""
if self._value is not None:
return self._value
value = copy.deepcopy(initial)
if isinstance(value, list):
for idx, obj in self._inserts:
value.insert(idx, obj)
value[:0] = self._prepend
value.extend(self._extend)
elif isinstance(value, dict):
if self._update:
value.update(self._update)
elif isinstance(value, set):
if self._update:
value.update(self._update)
self._value = value
return value
def to_dict(self):
"""return JSONable dict form of my data
Currently update as dict or set, extend, prepend as lists, and inserts as list of tuples.
"""
d = {}
if self._update:
d['update'] = self._update
if self._extend:
d['extend'] = self._extend
if self._prepend:
d['prepend'] = self._prepend
elif self._inserts:
d['inserts'] = self._inserts
return d
def _is_section_key(key):
"""Is a Config key a section name (does it start with a capital)?"""
if key and key[0].upper()==key[0] and not key.startswith('_'):
return True
else:
return False
class Config(dict):
"""An attribute based dict that can do smart merges."""
def __init__(self, *args, **kwds):
dict.__init__(self, *args, **kwds)
self._ensure_subconfig()
def _ensure_subconfig(self):
"""ensure that sub-dicts that should be Config objects are
casts dicts that are under section keys to Config objects,
which is necessary for constructing Config objects from dict literals.
"""
for key in self:
obj = self[key]
if _is_section_key(key) \
and isinstance(obj, dict) \
and not isinstance(obj, Config):
setattr(self, key, Config(obj))
def _merge(self, other):
"""deprecated alias, use Config.merge()"""
self.merge(other)
def merge(self, other):
"""merge another config object into this one"""
to_update = {}
for k, v in other.items():
if k not in self:
to_update[k] = v
else: # I have this key
if isinstance(v, Config) and isinstance(self[k], Config):
# Recursively merge common sub Configs
self[k].merge(v)
else:
# Plain updates for non-Configs
to_update[k] = v
self.update(to_update)
def collisions(self, other):
"""Check for collisions between two config objects.
Returns a dict of the form {"Class": {"trait": "collision message"}}`,
indicating which values have been ignored.
An empty dict indicates no collisions.
"""
collisions = {}
for section in self:
if section not in other:
continue
mine = self[section]
theirs = other[section]
for key in mine:
if key in theirs and mine[key] != theirs[key]:
collisions.setdefault(section, {})
collisions[section][key] = "%r ignored, using %r" % (mine[key], theirs[key])
return collisions
def __contains__(self, key):
# allow nested contains of the form `"Section.key" in config`
if '.' in key:
first, remainder = key.split('.', 1)
if first not in self:
return False
return remainder in self[first]
return super(Config, self).__contains__(key)
# .has_key is deprecated for dictionaries.
has_key = __contains__
def _has_section(self, key):
return _is_section_key(key) and key in self
def copy(self):
return type(self)(dict.copy(self))
def __copy__(self):
return self.copy()
def __deepcopy__(self, memo):
new_config = type(self)()
for key, value in self.items():
if isinstance(value, (Config, LazyConfigValue)):
# deep copy config objects
value = copy.deepcopy(value, memo)
elif type(value) in {dict, list, set, tuple}:
# shallow copy plain container traits
value = copy.copy(value)
new_config[key] = value
return new_config
def __getitem__(self, key):
try:
return dict.__getitem__(self, key)
except KeyError:
if _is_section_key(key):
c = Config()
dict.__setitem__(self, key, c)
return c
elif not key.startswith('_'):
# undefined, create lazy value, used for container methods
v = LazyConfigValue()
dict.__setitem__(self, key, v)
return v
else:
raise KeyError
def __setitem__(self, key, value):
if _is_section_key(key):
if not isinstance(value, Config):
raise ValueError('values whose keys begin with an uppercase '
'char must be Config instances: %r, %r' % (key, value))
dict.__setitem__(self, key, value)
def __getattr__(self, key):
if key.startswith('__'):
return dict.__getattr__(self, key)
try:
return self.__getitem__(key)
except KeyError as e:
raise AttributeError(e)
def __setattr__(self, key, value):
if key.startswith('__'):
return dict.__setattr__(self, key, value)
try:
self.__setitem__(key, value)
except KeyError as e:
raise AttributeError(e)
def __delattr__(self, key):
if key.startswith('__'):
return dict.__delattr__(self, key)
try:
dict.__delitem__(self, key)
except KeyError as e:
raise AttributeError(e)
#-----------------------------------------------------------------------------
# Config loading classes
#-----------------------------------------------------------------------------
class ConfigLoader(object):
"""A object for loading configurations from just about anywhere.
The resulting configuration is packaged as a :class:`Config`.
Notes
-----
A :class:`ConfigLoader` does one thing: load a config from a source
(file, command line arguments) and returns the data as a :class:`Config` object.
There are lots of things that :class:`ConfigLoader` does not do. It does
not implement complex logic for finding config files. It does not handle
default values or merge multiple configs. These things need to be
handled elsewhere.
"""
def _log_default(self):
from traitlets.log import get_logger
return get_logger()
def __init__(self, log=None):
"""A base class for config loaders.
log : instance of :class:`logging.Logger` to use.
By default loger of :meth:`traitlets.config.application.Application.instance()`
will be used
Examples
--------
>>> cl = ConfigLoader()
>>> config = cl.load_config()
>>> config
{}
"""
self.clear()
if log is None:
self.log = self._log_default()
self.log.debug('Using default logger')
else:
self.log = log
def clear(self):
self.config = Config()
def load_config(self):
"""Load a config from somewhere, return a :class:`Config` instance.
Usually, this will cause self.config to be set and then returned.
However, in most cases, :meth:`ConfigLoader.clear` should be called
to erase any previous state.
"""
self.clear()
return self.config
class FileConfigLoader(ConfigLoader):
"""A base class for file based configurations.
As we add more file based config loaders, the common logic should go
here.
"""
def __init__(self, filename, path=None, **kw):
"""Build a config loader for a filename and path.
Parameters
----------
filename : str
The file name of the config file.
path : str, list, tuple
The path to search for the config file on, or a sequence of
paths to try in order.
"""
super(FileConfigLoader, self).__init__(**kw)
self.filename = filename
self.path = path
self.full_filename = ''
def _find_file(self):
"""Try to find the file by searching the paths."""
self.full_filename = filefind(self.filename, self.path)
class JSONFileConfigLoader(FileConfigLoader):
"""A JSON file loader for config
Can also act as a context manager that rewrite the configuration file to disk on exit.
Example::
with JSONFileConfigLoader('myapp.json','/home/jupyter/configurations/') as c:
c.MyNewConfigurable.new_value = 'Updated'
"""
def load_config(self):
"""Load the config from a file and return it as a Config object."""
self.clear()
try:
self._find_file()
except IOError as e:
raise ConfigFileNotFound(str(e))
dct = self._read_file_as_dict()
self.config = self._convert_to_config(dct)
return self.config
def _read_file_as_dict(self):
with open(self.full_filename) as f:
return json.load(f)
def _convert_to_config(self, dictionary):
if 'version' in dictionary:
version = dictionary.pop('version')
else:
version = 1
if version == 1:
return Config(dictionary)
else:
raise ValueError('Unknown version of JSON config file: {version}'.format(version=version))
def __enter__(self):
self.load_config()
return self.config
def __exit__(self, exc_type, exc_value, traceback):
"""
Exit the context manager but do not handle any errors.
In case of any error, we do not want to write the potentially broken
configuration to disk.
"""
self.config.version = 1
json_config = json.dumps(self.config, indent=2)
with open(self.full_filename, 'w') as f:
f.write(json_config)
class PyFileConfigLoader(FileConfigLoader):
"""A config loader for pure python files.
This is responsible for locating a Python config file by filename and
path, then executing it to construct a Config object.
"""
def load_config(self):
"""Load the config from a file and return it as a Config object."""
self.clear()
try:
self._find_file()
except IOError as e:
raise ConfigFileNotFound(str(e))
self._read_file_as_dict()
return self.config
def load_subconfig(self, fname, path=None):
"""Injected into config file namespace as load_subconfig"""
if path is None:
path = self.path
loader = self.__class__(fname, path)
try:
sub_config = loader.load_config()
except ConfigFileNotFound:
# Pass silently if the sub config is not there,
# treat it as an empty config file.
pass
else:
self.config.merge(sub_config)
def _read_file_as_dict(self):
"""Load the config file into self.config, with recursive loading."""
def get_config():
"""Unnecessary now, but a deprecation warning is more trouble than it's worth."""
return self.config
namespace = dict(
c=self.config,
load_subconfig=self.load_subconfig,
get_config=get_config,
__file__=self.full_filename,
)
fs_encoding = sys.getfilesystemencoding() or 'ascii'
conf_filename = self.full_filename.encode(fs_encoding)
py3compat.execfile(conf_filename, namespace)
class CommandLineConfigLoader(ConfigLoader):
"""A config loader for command line arguments.
As we add more command line based loaders, the common logic should go
here.
"""
def _exec_config_str(self, lhs, rhs):
"""execute self.config.<lhs> = <rhs>
* expands ~ with expanduser
* tries to assign with literal_eval, otherwise assigns with just the string,
allowing `--C.a=foobar` and `--C.a="foobar"` to be equivalent. *Not*
equivalent are `--C.a=4` and `--C.a='4'`.
"""
rhs = os.path.expanduser(rhs)
try:
# Try to see if regular Python syntax will work. This
# won't handle strings as the quote marks are removed
# by the system shell.
value = literal_eval(rhs)
except (NameError, SyntaxError, ValueError):
# This case happens if the rhs is a string.
value = rhs
exec(u'self.config.%s = value' % lhs)
def _load_flag(self, cfg):
"""update self.config from a flag, which can be a dict or Config"""
if isinstance(cfg, (dict, Config)):
# don't clobber whole config sections, update
# each section from config:
for sec,c in cfg.items():
self.config[sec].update(c)
else:
raise TypeError("Invalid flag: %r" % cfg)
# raw --identifier=value pattern
# but *also* accept '-' as wordsep, for aliases
# accepts: --foo=a
# --Class.trait=value
# --alias-name=value
# rejects: -foo=value
# --foo
# --Class.trait
kv_pattern = re.compile(r'\-\-[A-Za-z][\w\-]*(\.[\w\-]+)*\=.*')
# just flags, no assignments, with two *or one* leading '-'
# accepts: --foo
# -foo-bar-again
# rejects: --anything=anything
# --two.word
flag_pattern = re.compile(r'\-\-?\w+[\-\w]*$')
class KeyValueConfigLoader(CommandLineConfigLoader):
"""A config loader that loads key value pairs from the command line.
This allows command line options to be gives in the following form::
ipython --profile="foo" --InteractiveShell.autocall=False
"""
def __init__(self, argv=None, aliases=None, flags=None, **kw):
"""Create a key value pair config loader.
Parameters
----------
argv : list
A list that has the form of sys.argv[1:] which has unicode
elements of the form u"key=value". If this is None (default),
then sys.argv[1:] will be used.
aliases : dict
A dict of aliases for configurable traits.
Keys are the short aliases, Values are the resolved trait.
Of the form: `{'alias' : 'Configurable.trait'}`
flags : dict
A dict of flags, keyed by str name. Vaues can be Config objects,
dicts, or "key=value" strings. If Config or dict, when the flag
is triggered, The flag is loaded as `self.config.update(m)`.
Returns
-------
config : Config
The resulting Config object.
Examples
--------
>>> from traitlets.config.loader import KeyValueConfigLoader
>>> cl = KeyValueConfigLoader()
>>> d = cl.load_config(["--A.name='brian'","--B.number=0"])
>>> sorted(d.items())
[('A', {'name': 'brian'}), ('B', {'number': 0})]
"""
super(KeyValueConfigLoader, self).__init__(**kw)
if argv is None:
argv = sys.argv[1:]
self.argv = argv
self.aliases = aliases or {}
self.flags = flags or {}
def clear(self):
super(KeyValueConfigLoader, self).clear()
self.extra_args = []
def _decode_argv(self, argv, enc=None):
"""decode argv if bytes, using stdin.encoding, falling back on default enc"""
uargv = []
if enc is None:
enc = DEFAULT_ENCODING
for arg in argv:
if not isinstance(arg, text_type):
# only decode if not already decoded
arg = arg.decode(enc)
uargv.append(arg)
return uargv
def load_config(self, argv=None, aliases=None, flags=None):
"""Parse the configuration and generate the Config object.
After loading, any arguments that are not key-value or
flags will be stored in self.extra_args - a list of
unparsed command-line arguments. This is used for
arguments such as input files or subcommands.
Parameters
----------
argv : list, optional
A list that has the form of sys.argv[1:] which has unicode
elements of the form u"key=value". If this is None (default),
then self.argv will be used.
aliases : dict
A dict of aliases for configurable traits.
Keys are the short aliases, Values are the resolved trait.
Of the form: `{'alias' : 'Configurable.trait'}`
flags : dict
A dict of flags, keyed by str name. Values can be Config objects
or dicts. When the flag is triggered, The config is loaded as
`self.config.update(cfg)`.
"""
self.clear()
if argv is None:
argv = self.argv
if aliases is None:
aliases = self.aliases
if flags is None:
flags = self.flags
# ensure argv is a list of unicode strings:
uargv = self._decode_argv(argv)
for idx,raw in enumerate(uargv):
# strip leading '-'
item = raw.lstrip('-')
if raw == '--':
# don't parse arguments after '--'
# this is useful for relaying arguments to scripts, e.g.
# ipython -i foo.py --matplotlib=qt -- args after '--' go-to-foo.py
self.extra_args.extend(uargv[idx+1:])
break
if kv_pattern.match(raw):
lhs,rhs = item.split('=',1)
# Substitute longnames for aliases.
if lhs in aliases:
lhs = aliases[lhs]
if '.' not in lhs:
# probably a mistyped alias, but not technically illegal
self.log.warning("Unrecognized alias: '%s', it will probably have no effect.", raw)
try:
self._exec_config_str(lhs, rhs)
except Exception:
raise ArgumentError("Invalid argument: '%s'" % raw)
elif flag_pattern.match(raw):
if item in flags:
cfg,help = flags[item]
self._load_flag(cfg)
else:
raise ArgumentError("Unrecognized flag: '%s'"%raw)
elif raw.startswith('-'):
kv = '--'+item
if kv_pattern.match(kv):
raise ArgumentError("Invalid argument: '%s', did you mean '%s'?"%(raw, kv))
else:
raise ArgumentError("Invalid argument: '%s'"%raw)
else:
# keep all args that aren't valid in a list,
# in case our parent knows what to do with them.
self.extra_args.append(item)
return self.config
class ArgParseConfigLoader(CommandLineConfigLoader):
"""A loader that uses the argparse module to load from the command line."""
def __init__(self, argv=None, aliases=None, flags=None, log=None, *parser_args, **parser_kw):
"""Create a config loader for use with argparse.
Parameters
----------
argv : optional, list
If given, used to read command-line arguments from, otherwise
sys.argv[1:] is used.
parser_args : tuple
A tuple of positional arguments that will be passed to the
constructor of :class:`argparse.ArgumentParser`.
parser_kw : dict
A tuple of keyword arguments that will be passed to the
constructor of :class:`argparse.ArgumentParser`.
Returns
-------
config : Config
The resulting Config object.
"""
super(CommandLineConfigLoader, self).__init__(log=log)
self.clear()
if argv is None:
argv = sys.argv[1:]
self.argv = argv
self.aliases = aliases or {}
self.flags = flags or {}
self.parser_args = parser_args
self.version = parser_kw.pop("version", None)
kwargs = dict(argument_default=argparse.SUPPRESS)
kwargs.update(parser_kw)
self.parser_kw = kwargs
def load_config(self, argv=None, aliases=None, flags=None):
"""Parse command line arguments and return as a Config object.
Parameters
----------
args : optional, list
If given, a list with the structure of sys.argv[1:] to parse
arguments from. If not given, the instance's self.argv attribute
(given at construction time) is used."""
self.clear()
if argv is None:
argv = self.argv
if aliases is None:
aliases = self.aliases
if flags is None:
flags = self.flags
self._create_parser(aliases, flags)
self._parse_args(argv)
self._convert_to_config()
return self.config
def get_extra_args(self):
if hasattr(self, 'extra_args'):
return self.extra_args
else:
return []
def _create_parser(self, aliases=None, flags=None):
self.parser = ArgumentParser(*self.parser_args, **self.parser_kw)
self._add_arguments(aliases, flags)
def _add_arguments(self, aliases=None, flags=None):
raise NotImplementedError("subclasses must implement _add_arguments")
def _parse_args(self, args):
"""self.parser->self.parsed_data"""
# decode sys.argv to support unicode command-line options
enc = DEFAULT_ENCODING
uargs = [py3compat.cast_unicode(a, enc) for a in args]
self.parsed_data, self.extra_args = self.parser.parse_known_args(uargs)
def _convert_to_config(self):
"""self.parsed_data->self.config"""
for k, v in vars(self.parsed_data).items():
exec("self.config.%s = v"%k, locals(), globals())
class KVArgParseConfigLoader(ArgParseConfigLoader):
"""A config loader that loads aliases and flags with argparse,
but will use KVLoader for the rest. This allows better parsing
of common args, such as `ipython -c 'print 5'`, but still gets
arbitrary config with `ipython --InteractiveShell.use_readline=False`"""
def _add_arguments(self, aliases=None, flags=None):
self.alias_flags = {}
# print aliases, flags
if aliases is None:
aliases = self.aliases
if flags is None:
flags = self.flags
paa = self.parser.add_argument
for key,value in aliases.items():
if key in flags:
# flags
nargs = '?'
else:
nargs = None
if len(key) is 1:
paa('-'+key, '--'+key, type=text_type, dest=value, nargs=nargs)
else:
paa('--'+key, type=text_type, dest=value, nargs=nargs)
for key, (value, help) in flags.items():
if key in self.aliases:
#
self.alias_flags[self.aliases[key]] = value
continue
if len(key) is 1:
paa('-'+key, '--'+key, action='append_const', dest='_flags', const=value)
else:
paa('--'+key, action='append_const', dest='_flags', const=value)
def _convert_to_config(self):
"""self.parsed_data->self.config, parse unrecognized extra args via KVLoader."""
# remove subconfigs list from namespace before transforming the Namespace
if '_flags' in self.parsed_data:
subcs = self.parsed_data._flags
del self.parsed_data._flags
else:
subcs = []
for k, v in vars(self.parsed_data).items():
if v is None:
# it was a flag that shares the name of an alias
subcs.append(self.alias_flags[k])
else:
# eval the KV assignment
self._exec_config_str(k, v)
for subc in subcs:
self._load_flag(subc)
if self.extra_args:
sub_parser = KeyValueConfigLoader(log=self.log)
sub_parser.load_config(self.extra_args)
self.config.merge(sub_parser.config)
self.extra_args = sub_parser.extra_args
def load_pyconfig_files(config_files, path):
"""Load multiple Python config files, merging each of them in turn.
Parameters
==========
config_files : list of str
List of config files names to load and merge into the config.
path : unicode
The full path to the location of the config files.
"""
config = Config()
for cf in config_files:
loader = PyFileConfigLoader(cf, path=path)
try:
next_config = loader.load_config()
except ConfigFileNotFound:
pass
except:
raise
else:
config.merge(next_config)
return config
|