本文整理汇总了Python中nltk.compat.unichr方法的典型用法代码示例。如果您正苦于以下问题：Python compat.unichr方法的具体用法？Python compat.unichr怎么用？Python compat.unichr使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类nltk.compat的用法示例。
在下文中一共展示了compat.unichr方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _replace_html_entities
# 需要导入模块: from nltk import compat [as 别名]
# 或者: from nltk.compat import unichr [as 别名]
def _replace_html_entities(text, keep=(), remove_illegal=True, encoding='utf-8'):
"""
Remove entities from text by converting them to their
corresponding unicode character.
:param text: a unicode string or a byte string encoded in the given
`encoding` (which defaults to 'utf-8').
:param list keep: list of entity names which should not be replaced.\
This supports both numeric entities (``&#nnnn;`` and ``&#hhhh;``)
and named entities (such as `` `` or ``>``).
:param bool remove_illegal: If `True`, entities that can't be converted are\
removed. Otherwise, entities that can't be converted are kept "as
is".
:returns: A unicode string with the entities removed.
See https://github.com/scrapy/w3lib/blob/master/w3lib/html.py
>>> from nltk.tokenize.casual import _replace_html_entities
>>> _replace_html_entities(b'Price: £100')
'Price: \\xa3100'
>>> print(_replace_html_entities(b'Price: £100'))
Price: £100
>>>
"""
def _convert_entity(match):
entity_body = match.group(3)
if match.group(1):
try:
if match.group(2):
number = int(entity_body, 16)
else:
number = int(entity_body, 10)
# Numeric character references in the 80-9F range are typically
# interpreted by browsers as representing the characters mapped
# to bytes 80-9F in the Windows-1252 encoding. For more info
# see: http://en.wikipedia.org/wiki/Character_encodings_in_HTML
if 0x80 <= number <= 0x9f:
return int2byte(number).decode('cp1252')
except ValueError:
number = None
else:
if entity_body in keep:
return match.group(0)
else:
number = htmlentitydefs.name2codepoint.get(entity_body)
if number is not None:
try:
return unichr(number)
except ValueError:
pass
return "" if remove_illegal else match.group(0)
return ENT_RE.sub(_convert_entity, _str_to_unicode(text, encoding))
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