/usr/lib/python2.7/dist-packages/ConfigArgParse-0.11.0.egg-info/PKG-INFO is in python-configargparse 0.11.0-1.
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 | Metadata-Version: 1.1
Name: ConfigArgParse
Version: 0.11.0
Summary: A drop-in replacement for argparse that allows options to also be set via config files and/or environment variables.
Home-page: https://github.com/bw2/ConfigArgParse
Author: Zorro
Author-email: zorro3.github@gmail.com
License: MIT
Description: Overview
~~~~~~~~
Applications with more than a handful of user-settable options are best
configured through a combination of command line args, config files,
hard-coded defaults, and in some cases, environment variables.
Python's command line parsing modules such as argparse have very limited
support for config files and environment variables, so this module
extends argparse to add these features.
|Travis CI Status for bw2/ConfigArgParse| -- from `Travis CI <https://travis-ci.org/bw2/ConfigArgParse/>`_
Features
~~~~~~~~
- command-line, config file, env var, and default settings can now be
defined, documented, and parsed in one go using a single API (if a
value is specified in more than one way then: command line >
environment variables > config file values > defaults)
- config files can have .ini or .yaml style syntax (eg. key=value or
key: value)
- user can provide a config file via a normal-looking command line arg
(eg. -c path/to/config.txt) rather than the argparse-style @config.txt
- one or more default config file paths can be specified
(eg. ['/etc/bla.conf', '~/.my_config'] )
- all argparse functionality is fully supported, so this module can
serve as a drop-in replacement (verified by argparse unittests).
- env vars and config file keys & syntax are automatically documented
in the -h help message
- new method :code:`print_values()` can report keys & values and where
they were set (eg. command line, env var, config file, or default).
- lite-weight (no 3rd-party library dependencies except (optionally) PyYAML)
- extensible (:code:`ConfigFileParser` can be subclassed to define a new
config file format)
- unittested by running the unittests that came with argparse but on
configargparse, and using tox to test with python2.7+ and python3+
Example
~~~~~~~
*my_script.py*:
Script that defines 4 options and a positional arg and then parses and prints the values. Also,
it prints out the help message as well as the string produced by :code:`format_values()` to show
what they look like.
.. code:: py
import configargparse
p = configargparse.ArgParser(default_config_files=['/etc/settings.ini', '~/.my_settings'])
p.add('-c', '--my-config', required=True, is_config_file=True, help='config file path')
p.add('--genome', required=True, help='path to genome file') # this option can be set in a config file because it starts with '--'
p.add('-v', help='verbose', action='store_true')
p.add('-d', '--dbsnp', help='known variants .vcf', env_var='DBSNP_PATH') # this option can be set in a config file because it starts with '--'
p.add('vcf', nargs='+', help='variant file(s)')
options = p.parse_args()
print(options)
print("----------")
print(p.format_help())
print("----------")
print(p.format_values()) # useful for logging where different settings came from
*config.txt:*
Since the script above set the config file as required=True, lets create a config file to give it:
.. code:: py
# settings for my_script.py
genome = HCMV # cytomegalovirus genome
dbsnp = /data/dbsnp/variants.vcf
*command line:*
Now run the script and pass it the config file:
.. code:: bash
python my_script.py --genome hg19 --my-config config.txt f1.vcf f2.vcf
*output:*
Here is the result:
.. code:: bash
Namespace(dbsnp='/data/dbsnp/variants.vcf', genome='hg19', my_config='config.txt', vcf=['f1.vcf', 'f2.vcf'], verbose=False)
----------
usage: my_script.py [-h] --genome GENOME [-v] -c MY_CONFIG [-d DBSNP]
vcf [vcf ...]
Args that start with '--' (eg. --genome) can also be set in a config file
(/etc/settings.ini or /home/jeff/.my_settings or provided via -c) by using
.ini or .yaml-style syntax (eg. genome=value). Command-line values override
environment variables which override config file values which override
defaults.
positional arguments:
vcf variant file
optional arguments:
-h, --help show this help message and exit
--genome GENOME path to genome file
-v verbose
-c MY_CONFIG, --my-config MY_CONFIG
config file path
-d DBSNP, --dbsnp DBSNP
known variants .vcf [env var: DBSNP_PATH]
----------
Command Line Args: --genome hg19 --my-config config.txt f1.vcf f2.vcf
Config File (config.txt):
dbsnp: /data/dbsnp/variants.vcf
Special Values
~~~~~~~~~~~~~~
Under the hood, configargparse handles environment variables and config file
values by converting them to their corresponding command line arg. For
example, "key = value" will be processed as if "--key value" was specified
on the command line.
Also, the following special values (whether in a config file or an environment
variable) are handled in a special way to support booleans and lists:
- :code:`key = true` is handled as if "--key" was specified on the command line.
In your python code this key must be defined as a boolean flag
(eg. action="store_true" or similar).
- :code:`key = [value1, value2, ...]` is handled as if "--key value1 --key value2"
etc. was specified on the command line. In your python code this key must
be defined as a list (eg. action="append").
Config File Syntax
~~~~~~~~~~~~~~~~~~
Only command line args that have a long version (eg. one that starts with '--')
can be set in a config file. For example, "--color" can be set by
putting "color=green" in a config file. The config file syntax depends on the
constuctor arg: :code:`config_file_parser_class` which can be set to one of the
provided classes: :code:`DefaultConfigFileParser` or :code:`YAMLConfigFileParser`,
or to your own subclass of the :code:`ConfigFileParser` abstract class.
*DefaultConfigFileParser* - the full range of valid syntax is:
.. code:: yaml
# this is a comment
; this is also a comment (.ini style)
--- # lines that start with --- are ignored (yaml style)
-------------------
[section] # .ini-style section names are treated as comments
# how to specify a key-value pair (all of these are equivalent):
name value # key is case sensitive: "Name" isn't "name"
name = value # (.ini style) (white space is ignored, so name = value same as name=value)
name: value # (yaml style)
--name value # (argparse style)
# how to set a flag arg (eg. arg which has action="store_true")
--name
name
name = True # "True" and "true" are the same
# how to specify a list arg (eg. arg which has action="append")
fruit = [apple, orange, lemon]
indexes = [1, 12, 35 , 40]
*YAMLConfigFileParser* - allows a subset of YAML syntax (http://goo.gl/VgT2DU)
.. code:: yaml
# a comment
name1: value
name2: true # "True" and "true" are the same
fruit: [apple, orange, lemon]
indexes: [1, 12, 35, 40]
ArgParser Singletons
~~~~~~~~~~~~~~~~~~~~~~~~~
To make it easier to configure different modules in an application,
configargparse provides globally-available ArgumentParser instances
via configargparse.getArgumentParser('name') (similar to
logging.getLogger('name')).
Here is an example of an application with a utils module that also
defines and retrieves its own command-line args.
*main.py*
.. code:: py
import configargparse
import utils
p = configargparse.getArgumentParser()
p.add_argument("-x", help="Main module setting")
p.add_argument("--m-setting", help="Main module setting")
options = p.parse_known_args() # using p.parse_args() here may raise errors.
*utils.py*
.. code:: py
import configargparse
p = configargparse.getArgumentParser()
p.add_argument("--utils-setting", help="Config-file-settable option for utils")
if __name__ == "__main__":
options = p.parse_known_args()
Help Formatters
~~~~~~~~~~~~~~~
:code:`ArgumentDefaultsRawHelpFormatter` is a new HelpFormatter that both adds
default values AND disables line-wrapping. It can be passed to the constructor:
:code:`ArgParser(.., formatter_class=ArgumentDefaultsRawHelpFormatter)`
Aliases
~~~~~~~
The configargparse.ArgumentParser API inherits its class and method
names from argparse and also provides the following shorter names for
convenience:
- p = configargparse.getArgParser() # get global singleton instance
- p = configargparse.getParser()
- p = configargparse.ArgParser() # create a new instance
- p = configargparse.Parser()
- p.add_arg(..)
- p.add(..)
- options = p.parse(..)
HelpFormatters:
- RawFormatter = RawDescriptionHelpFormatter
- DefaultsFormatter = ArgumentDefaultsHelpFormatter
- DefaultsRawFormatter = ArgumentDefaultsRawHelpFormatter
Design Notes
~~~~~~~~~~~~
Unit tests:
tests/test_configargparse.py contains custom unittests for features
specific to this module (such as config file and env-var support), as
well as a hook to load and run argparse unittests (see the built-in
test.test_argparse module) but on configargparse in place of argparse.
This ensures that configargparse will work as a drop in replacement for
argparse in all usecases.
Previously existing modules (PyPI search keywords: config argparse):
- argparse (built-in module python v2.7+ )
- Good:
- fully featured command line parsing
- can read args from files using an easy to understand mechanism
- Bad:
- syntax for specifying config file path is unusual (eg.
@file.txt)and not described in the user help message.
- default config file syntax doesn't support comments and is
unintuitive (eg. --namevalue)
- no support for environment variables
- ConfArgParse v1.0.15
(https://pypi.python.org/pypi/ConfArgParse)
- Good:
- extends argparse with support for config files parsed by
ConfigParser
- clear documentation in README
- Bad:
- config file values are processed using
ArgumentParser.set_defaults(..) which means "required" and
"choices" are not handled as expected. For example, if you
specify a required value in a config file, you still have to
specify it again on the command line.
- doesn't work with python 3 yet
- no unit tests, code not well documented
- appsettings v0.5 (https://pypi.python.org/pypi/appsettings)
- Good:
- supports config file (yaml format) and env_var parsing
- supports config-file-only setting for specifying lists and
dicts
- Bad:
- passes in config file and env settings via parse_args
namespace param
- tests not finished and don't work with python3 (import
StringIO)
- argparse_config v0.5.1
(https://pypi.python.org/pypi/argparse_config)
- Good:
- similar features to ConfArgParse v1.0.15
- Bad:
- doesn't work with python3 (error during pip install)
- yconf v0.3.2 - (https://pypi.python.org/pypi/yconf) - features
and interface not that great
- hieropt v0.3 - (https://pypi.python.org/pypi/hieropt) - doesn't
appear to be maintained, couldn't find documentation
- configurati v0.2.3 - (https://pypi.python.org/pypi/configurati)
- Good:
- JSON, YAML, or Python configuration files
- handles rich data structures such as dictionaries
- can group configuration names into sections (like .ini files)
- Bad:
- doesn't work with python3
- 2+ years since last release to PyPI
- apparently unmaintained
Design choices:
1. all options must be settable via command line. Having options that
can only be set using config files or env. vars adds complexity to
the API, and is not a useful enough feature since the developer can
split up options into sections and call a section "config file keys",
with command line args that are just "--" plus the config key.
2. config file and env. var settings should be processed by appending
them to the command line (another benefit of #1). This is an
easy-to-implement solution and implicitly takes care of checking that
all "required" args are provied, etc., plus the behavior should be
easy for users to understand.
3. configargparse shouldn't override argparse's
convert_arg_line_to_args method so that all argparse unit tests
can be run on configargparse.
4. in terms of what to allow for config file keys, the "dest" value of
an option can't serve as a valid config key because many options can
have the same dest. Instead, since multiple options can't use the
same long arg (eg. "--long-arg-x"), let the config key be either
"--long-arg-x" or "long-arg-x". This means the developer can allow
only a subset of the command-line args to be specified via config
file (eg. short args like -x would be excluded). Also, that way
config keys are automatically documented whenever the command line
args are documented in the help message.
5. don't force users to put config file settings in the right .ini
[sections]. This doesn't have a clear benefit since all options are
command-line settable, and so have a globally unique key anyway.
Enforcing sections just makes things harder for the user and adds
complexity to the implementation.
6. if necessary, config-file-only args can be added later by
implementing a separate add method and using the namespace arg as in
appsettings_v0.5
Relevant sites:
- http://stackoverflow.com/questions/6133517/parse-config-file-environment-and-command-line-arguments-to-get-a-single-coll
- http://tricksntweaks.blogspot.com/2013_05_01_archive.html
- http://www.youtube.com/watch?v=vvCwqHgZJc8#t=35
.. |Travis CI Status for bw2/ConfigArgParse| image:: https://travis-ci.org/bw2/ConfigArgParse.svg?branch=master
Keywords: options,argparse,ConfigArgParse,config,environment variables,envvars,ENV,environment,optparse,YAML,INI
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Natural Language :: English
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.2
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
|