45 lines
1.4 KiB
Python
45 lines
1.4 KiB
Python
import importlib
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import sys
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import types
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# This gets cleared if this package/the __init__ module is reloaded
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_module_cache: dict[str, types.ModuleType] = {}
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def enable_reload(module_name: str):
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"""Enable reloading for the next time the module with `module_name`
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is executed.
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"""
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mod = sys.modules[module_name]
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setattr(mod, module_name.replace('.', '_') + "_DO_RELOAD_MODULE", True)
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def is_reload(module_name: str) -> bool:
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"""True if the module given by `module_name` should reload the
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modules it imports. This is the case if `enable_reload()` was called
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for the module before.
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"""
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mod = sys.modules[module_name]
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return hasattr(mod, module_name.replace('.', '_') + "_DO_RELOAD_MODULE")
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def reload_module(module: types.ModuleType) -> types.ModuleType:
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"""Wrapper around importlib.reload() to make sure no module is
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reloaded twice.
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Make sure to call this function in the same order in which the
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modules are imported to make sure that the reloading respects the
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module dependencies. Otherwise modules could depend on other modules
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that are not yet reloaded.
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If you import classes or functions from a module, make sure to
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re-import them after the module is reloaded.
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"""
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mod = _module_cache.get(module.__name__, None)
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if mod is None:
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mod = importlib.reload(module)
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_module_cache[module.__name__] = mod
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return mod
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