diff options
Diffstat (limited to 'fg21sim/configs')
| -rw-r--r-- | fg21sim/configs/manager.py | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/fg21sim/configs/manager.py b/fg21sim/configs/manager.py index ff950bb..2252e61 100644 --- a/fg21sim/configs/manager.py +++ b/fg21sim/configs/manager.py @@ -14,6 +14,7 @@ import sys import logging from logging import FileHandler, StreamHandler from functools import reduce +import operator import pkg_resources from configobj import ConfigObj, ConfigObjError, flatten_errors @@ -188,42 +189,45 @@ class ConfigManager: config = self._config return config.get(key, fallback) - def getn(self, key, sep="/", from_default=False): + def getn(self, key, from_default=False): """Get the config value from the nested dictionary configs using - a list of keys or a "sep"-separated keys strings. + a list of keys or a "sep"-separated keys string. Parameters ---------- key : str, or list[str] - List of keys or a string separated by a specific character - (e.g., "/") to specify the item in the ``self._config``, which + List of keys or a string of keys separated by a the ``/`` + character to specify the item in the ``self._config``, which is a nested dictionary. e.g., ``["section1", "key2"]``, ``"section1/key2"`` - sep : str (len=1), optional - If the above "keys" is a string, then this parameter specify - the character used to separate the multi-level keys. - This parameter should be a string of length 1 (i.e., a character). from_default : bool, optional If True, get the config option value from the *default* configurations, other than the configurations merged with user configurations (default). + Raises + ------ + KeyError : + The input key specifies a non-exist config option. + References ---------- - Stackoverflow: Checking a Dictionary using a dot notation string https://stackoverflow.com/q/12414821/4856091 + https://stackoverflow.com/a/12414913/4856091 """ - if len(sep) != 1: - raise ValueError("Invalid parameter 'sep': %s" % sep) if isinstance(key, str): - key = key.split(sep) + key = key.split("/") # if from_default: config = self._config_default else: config = self._config # - return reduce(dict.get, key, config) + try: + return reduce(operator.getitem, key, config) + except (KeyError, TypeError): + raise KeyError("%s: invalid key") def get_path(self, key): """Return the absolute path of the file/directory specified by the |