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49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
from typing import Callable, Generator
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def get_all_safe_functions() -> Generator[list[Callable], None, None]:
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"""
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Return all the safe function defined in safe_function
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"""
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for obj_name in filter(lambda obj_name: "__" not in obj_name, dir(safe_function)):
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obj = getattr(safe_function, obj_name)
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if callable(obj): yield obj
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yield from safe_builtins
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# these functions are builtins function that don't need additional check to be safe
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safe_builtins: list[Callable] = [
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abs, all, any, ascii, bin, bool, chr, dict, enumerate, float, hasattr, hex, int,
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isinstance, issubclass, len, list, max, min, oct, ord, range, repr, reversed,
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round, sorted, str, sum, tuple, type, zip,
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]
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class safe_function:
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"""
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Safer version of some python builtins function
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"""
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@staticmethod
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def getattr(obj: any, name: str, default=None) -> any:
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"""
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Same as normal getattr, but magic attribute are banned
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"""
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if "__" in name: raise Exception(f'Magic method are not allowed : "{name}"')
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return getattr(obj, name, default)
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@staticmethod
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def type(obj: any):
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"""
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Same as normal type, but the syntax with 3 arguments (to create new type) is banned
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"""
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return type(obj)
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@staticmethod
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def eval(template: str, env: dict | None = None):
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"""
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Allow a recursive safe_eval, but without the lambda functionality
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"""
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from source.safe_eval.safe_eval import safe_eval
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return safe_eval(template=template, env=env)
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