merge multi level configurations
Project description
configmerger
merge multi level configurations.
Usage
from configmerger import Merger
# your configurations, read from app.json, machine.yaml, user.toml, or more
confs = [
read_from_app(),
read_from_machine(),
read_from_user(),
]
# merge all configurations into one.
runtime_conf = Merger().merge(confs)
Merge Rules
Here is the default merge rules:
merger = Merger()
# for dict, a little like Chainmap
merger.merge([
{'a': 1},
{'a': 2, 'b': 3},
{ 'b': 4}
])
# {'a': 2, 'b': 4}
# for list, default behavior is connect each
# change `merger.connect_list` to `False` can change this behavior
merger.merge([ [1, 2, 3], [4, 5] ]) # [4, 5, 1, 2, 3]
# for str, int and others, latest have highest priority
merger.merge([ 'first', 'last' ]) # 'last'
# basic, `None` is ignored
merger.merge([ 1, None ]) # 1
# but if all values is `None`, return `None`
merger.merge([ None, None ]) # None
# if type changed, merge will stop,
merger.merge([
{'a': 1}, # <--- ignored
1, # <--- type changed, ignore all before this
{'b': 2},
None, # <--- None is ignored
{'c': 3},
])# {'b': 2, 'c': 3}
Override any methods to modify the default behavior.
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