63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
from inspect import _empty, isclass, signature
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from typing import Callable, ForwardRef, Union
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from typeguard import check_type
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SLACK_DICT = {
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bool: (int, bool, float),
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}
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def validate_argument_types(func: Callable, args: tuple, kwargs: dict):
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"""
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Validate the types of the arguments passed to a function with the type annotations
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defined on the function.
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"""
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if annotations := func.__annotations__:
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# generate kwargs dict from args
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arg_names = func.__code__.co_varnames[: func.__code__.co_argcount]
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if not args:
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prepared_args = kwargs
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elif kwargs:
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arg_values = args or func.__defaults__ or []
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prepared_args = dict(zip(arg_names, arg_values))
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prepared_args.update(kwargs)
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else:
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prepared_args = dict(zip(arg_names, args))
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# check if type hints dont match the default values
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func_signature = signature(func)
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func_params = dict(func_signature.parameters)
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# check if the argument types are correct
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for current_arg, current_arg_type in annotations.items():
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if current_arg not in prepared_args:
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continue
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current_arg_value = prepared_args[current_arg]
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# if the type is a ForwardRef or str, ignore it
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if isinstance(current_arg_type, (ForwardRef, str)):
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continue
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elif any(isinstance(x, (ForwardRef, str)) for x in getattr(current_arg_type, "__args__", [])):
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continue
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# allow slack for Frappe types
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if current_arg_type in SLACK_DICT:
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current_arg_type = SLACK_DICT[current_arg_type]
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param_def = func_params.get(current_arg)
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# add default value's type in acceptable types
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if param_def.default is not _empty:
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if isinstance(current_arg_type, tuple):
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if param_def.default not in current_arg_type:
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current_arg_type += (type(param_def.default),)
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elif param_def.default != current_arg_type:
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current_arg_type = Union[current_arg_type, type(param_def.default)]
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check_type(current_arg, current_arg_value, current_arg_type)
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