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https://github.com/gnuradio/gnuradio-companion.git
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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
71 lines
1.7 KiB
Python
71 lines
1.7 KiB
Python
# Copyright 2017 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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import re
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from os import path
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try:
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# raise ImportError()
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from lxml import etree
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HAVE_LXML = True
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except ImportError:
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import xml.etree.ElementTree as etree
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HAVE_LXML = False
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_validator_cache = {None: lambda xml: True}
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def _get_validator(dtd=None):
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validator = _validator_cache.get(dtd)
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if not validator:
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if not path.isabs(dtd):
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dtd = path.join(path.dirname(__file__), dtd)
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validator = _validator_cache[dtd] = etree.DTD(dtd).validate
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return validator
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def load_lxml(filename, document_type_def=None):
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"""Load block description from xml file"""
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try:
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xml_tree = etree.parse(filename)
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_get_validator(document_type_def)
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element = xml_tree.getroot()
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except etree.LxmlError:
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raise ValueError("Failed to parse or validate {}".format(filename))
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version_info = {}
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for inst in xml_tree.xpath('/processing-instruction()'):
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if inst.target == 'grc':
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version_info.update(inst.attrib)
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return element, version_info
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def load_stdlib(filename, document_type_def=None):
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"""Load block description from xml file"""
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with open(filename, 'rb') as xml_file:
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data = xml_file.read().decode('utf-8')
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try:
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element = etree.fromstring(data)
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except etree.ParseError:
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raise ValueError("Failed to parse {}".format(filename))
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version_info = {}
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for body in re.findall(r'<\?(.*?)\?>', data):
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inst = etree.fromstring('<' + body + '/>')
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if inst.tag == 'grc':
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version_info.update(inst.attrib)
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return element, version_info
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load = load_lxml if HAVE_LXML else load_stdlib
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