45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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# vim:fenc=utf-8
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#
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# Copyright © 2017 lafrite <lafrite@Poivre>
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#
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# Distributed under terms of the MIT license.
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"""
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Decorator to filter MO before operate
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"""
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from functools import wraps
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from .exceptions import ComputeError
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def args_are(left_type, right_type):
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""" Decorator which filter arguments type
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:param left_type: class or tuple of class to pass to isinstance for left arg
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:param right_type: class or tuple of class to pass to isinstance for right arg
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:returns: a decorator which will allow only some type
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"""
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def type_filter(func):
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@wraps(func)
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def filtered_func(left, right):
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if not isinstance(left, left_type):
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raise ComputeError("Wrong type for left argument"
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f"Require {left_type}, got {left.__class__.__name__}"
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)
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if not isinstance(right, right_type):
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raise ComputeError("Wrong type for right argument"
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f"Require {right_type}, got {right.__class__.__name__}"
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)
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return func(left, right)
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return filtered_func
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return type_filter
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# -----------------------------
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# Reglages pour 'vim'
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# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
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# cursor: 16 del
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