mirror of
https://github.com/python/cpython.git
synced 2026-05-07 05:01:13 -04:00
Serhiy Storchaka
38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
lazy import re as _re
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def is_valid_name(name):
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"""Test whether a string is a valid element or attribute name."""
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# https://www.w3.org/TR/xml/#NT-Name
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return _re.fullmatch(
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# NameStartChar
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'['
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':A-Z_a-z'
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'\xC0-\xD6\xD8-\xF6\xF8-\u02FF\u0370-\u037D\u037F-\u1FFF'
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'\u200C\u200D'
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'\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF'
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'\uF900-\uFDCF\uFDF0-\uFFFD\U00010000-\U000EFFFF'
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']'
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# NameChar
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'['
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r'\-.0-9:A-Z_a-z'
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'\xB7'
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'\xC0-\xD6\xD8-\xF6\xF8-\u037D\u037F-\u1FFF'
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'\u200C\u200D\u203F\u2040'
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'\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF'
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'\uF900-\uFDCF\uFDF0-\uFFFD\U00010000-\U000EFFFF'
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']*+',
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name) is not None
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# https://www.w3.org/TR/xml/#charsets
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_ILLEGAL_XML_CHAR = (
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'['
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'\x00-\x08\x0B\x0C\x0E-\x1F' # C0 controls except TAB, CR and LF
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'\uD800-\uDFFF' # the surrogate blocks
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'\uFFFE\uFFFF' # special Unicode characters
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']')
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def is_valid_text(data):
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"""Test whether a string is a sequence of legal XML 1.0 characters."""
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return _re.search(_ILLEGAL_XML_CHAR, data) is None
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