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https://github.com/ets-labs/python-dependency-injector.git
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69 lines
1.7 KiB
Python
69 lines
1.7 KiB
Python
"""Config provider examples."""
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from dependency_injector.catalog import AbstractCatalog
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from dependency_injector.providers import Config
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from dependency_injector.providers import Factory
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from dependency_injector.injections import KwArg
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class ObjectA(object):
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"""Example class ObjectA, that has dependencies on some setting values."""
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def __init__(self, fee, price, timezone):
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"""Initializer."""
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self.fee = fee
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self.price = price
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self.timezone = timezone
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class Catalog(AbstractCatalog):
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"""Catalog of dependency_injector providers."""
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config = Config()
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""":type: (dependency_injector.Config)"""
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object_a = Factory(ObjectA,
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KwArg('fee', config.FEE),
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KwArg('price', config.PRICE),
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KwArg('timezone', config.GLOBAL.TIMEZONE))
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""":type: (dependency_injector.Provider) -> ObjectA"""
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# Setting config value and making some tests.
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Catalog.config.update_from({
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'FEE': 1.25,
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'PRICE': 2.99,
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'GLOBAL': {
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'TIMEZONE': 'US/Eastern'
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}
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})
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object_a1 = Catalog.object_a()
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assert object_a1.fee == 1.25
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assert object_a1.price == 2.99
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assert object_a1.timezone == 'US/Eastern'
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# Changing config value one more time and making some tests.
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Catalog.config.update_from({
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'FEE': 5.25,
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'PRICE': 19.99,
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'GLOBAL': {
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'TIMEZONE': 'US/Western'
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}
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})
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object_a2 = Catalog.object_a()
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# New one ObjectA has new config values.
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assert object_a2.fee == 5.25
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assert object_a2.price == 19.99
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assert object_a2.timezone == 'US/Western'
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# And old one has old ones.
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assert object_a1.fee == 1.25
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assert object_a1.price == 2.99
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assert object_a1.timezone == 'US/Eastern'
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