A simplified interface to ConfigParser using dot notion with data type / comment support.
- Simple access to config using dot notion and iterators
- Full compatibility with ConfigParser ini formats (as that is used as the backend)
- Data type support by intelligently guessing the data types based on value on read.
- Multiple config source input (read from string, file pointer, file, or list of them)
- Full comment support / retention on save
- Lazy reading of config sources for performance (only read when a config value is accessed)
To install:
pip install localconfig
Let's say we have a script named program with the following config in ~/.config/program:
[Web Server]
# Server host
host = 0.0.0.0
# Server port
port = 8080
# Debug logging
debug = offTo read the config, simply do:
from localconfig import config
start_server(config.web_server.host, config.web_server.port, config.web_server.debug)
# Or use get method:
# start_server(config.get('Web Server', 'host'),
# config.get('Web Server', 'port'),
# config.get('web_server', 'debug')) # Yes, 'web_server' also works here!
#
# Or if the config is in docstring, read from it:
# config.read(__doc__)
#
# Or if the config file is elsewhere:
# config.read('/etc/path/to/config.ini') # Non-existing file is ignored
#
# Or read from a list of sources
# config.read(['string config', file_path, file_pointer, io.StringIO('config')])
#
# Or create another instance for another config:
# from localconfig import LocalConfig
# config2 = LocalConfig('/etc/path/to/another/config.ini')Configs are read in the order they are called using config.read(), but the config file passed to the LocalConfig() constructor (defaults to ~/.config/$script_name) will be read last before the first access to config values, which allows us to read configs from various locations, like default configs from a string that is checked in with the code, while allowing them to be overrriden from the config file that is passed to the constructor.
Now, let's do some inspection:
# Iterate over sections and their keys/values
for section in config:
print(section) # Web Server
for key, value in config.items(section):
print(key, value, type(value)) # host 0.0.0.0 <type 'str'>
# port 8080 <type 'int'>
# debug False <type 'bool'>
sections = list(config) # ['Web Server']
# Iterate over keys/values
for key, value in config.web_server:
print(key, value, type(value)) # Same output as above config.items()
items = list(config.web_server) # [('host', '0.0.0.0'), ('port', 8080), ('debug', False)]
items = dict(config.web_server) # {'host': '0.0.0.0', 'port': 8080, 'debug': False}
# Check if a section or key is set - any non-existing section or key defaults to None.
if config.web_server or config.no_such_section:
pass
if config.web_server and (config.web_server.port or config.web_server.no_such_key):
passTo add a section and set a value:
config.add_section('App Server', comment='Settings for application server')
config.app_server.host = 'localhost'
# Use `set` if you want to set a comment
config.set('App Server', 'port', 9090, comment='App server port')
# Set value for the DEFAULT section (default value for all other sections)
config.env = 'prod'To write the config:
config.save()
# Or simply get the config as a string:
# config_str = str(config)
#
# Or save to a different location:
# config.save('/path/to/save/to.ini')If we open ~/.config/program now, we would see:
[DEFAULT] env = prod [Web Server] # Server host host = 0.0.0.0 # Server port port = 8080 # Debug logging debug = off # Settings for application server [App Server] host = localhost # App server port port = 9090
Data type is guessed based on the value and converted on read.
The following types are supported:
| Type | Example Value |
|---|---|
| int | 1 0b1101 0o70 0xFF |
| float | 2.0 |
| bool | true false yes no on off (case insensitive) |
| None | none (case insensitive) |
| str | Any other value not matched by above |
Check out: https://pypi.python.org/pypi/remoteconfig
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