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43e6a43e3d
All of the removed `from __future__ import` were needed in older versions of Python (mostly 2.5.x and below) but later became mandatory in most versions of Python 3 hence are not necessary anymore. More specifically, according to __future__.py[1]: - unicode_literals is part of Python since versions 2.6.0 and 3.0.0; - print_function is part of Python since versions 2.6.0 and 3.0.0; - absolute_import is part of Python since versions 2.5.0 and 3.0.0; - division is part of Python since versions 2.2.0 and 3.0.0; Get rid of those unnecessary imports to slightly clean up the codebase. [1] https://github.com/python/cpython/blob/master/Lib/__future__.py
66 lines
1.8 KiB
Python
66 lines
1.8 KiB
Python
# Copyright 2016 Free Software Foundation, Inc.
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# This file is part of GNU Radio
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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#
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"""
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This dict class holds a (shared) cache of compiled mako templates.
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These
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"""
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from mako.template import Template
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from mako.exceptions import SyntaxException
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from ..errors import TemplateError
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class MakoTemplates(dict):
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_template_cache = {}
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def __init__(self, _bind_to=None, *args, **kwargs):
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self.instance = _bind_to
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dict.__init__(self, *args, **kwargs)
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def __get__(self, instance, owner):
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if instance is None or self.instance is not None:
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return self
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copy = self.__class__(_bind_to=instance, **self)
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if getattr(instance.__class__, 'templates', None) is self:
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setattr(instance, 'templates', copy)
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return copy
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@classmethod
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def compile(cls, text):
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text = str(text)
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try:
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template = Template(text, strict_undefined=True)
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except SyntaxException as error:
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raise TemplateError(text, *error.args)
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cls._template_cache[text] = template
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return template
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def _get_template(self, text):
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try:
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return self._template_cache[str(text)]
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except KeyError:
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return self.compile(text)
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def render(self, item):
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text = self.get(item)
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if not text:
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return ''
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namespace = self.instance.namespace_templates
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try:
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if isinstance(text, list):
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templates = (self._get_template(t) for t in text)
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return [template.render(**namespace) for template in templates]
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else:
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template = self._get_template(text)
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return template.render(**namespace)
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except Exception as error:
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raise TemplateError(error, text)
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