<h2>Editing File: /lib64/python3.12/importlib/metadata/_text.py</h2><form method='post'><textarea name='content' class='file-edit'>import re

from ._functools import method_cache


# from jaraco.text 3.5
class FoldedCase(str):
    &quot;&quot;&quot;
    A case insensitive string class; behaves just like str
    except compares equal when the only variation is case.

    &gt;&gt;&gt; s = FoldedCase('hello world')

    &gt;&gt;&gt; s == 'Hello World'
    True

    &gt;&gt;&gt; 'Hello World' == s
    True

    &gt;&gt;&gt; s != 'Hello World'
    False

    &gt;&gt;&gt; s.index('O')
    4

    &gt;&gt;&gt; s.split('O')
    ['hell', ' w', 'rld']

    &gt;&gt;&gt; sorted(map(FoldedCase, ['GAMMA', 'alpha', 'Beta']))
    ['alpha', 'Beta', 'GAMMA']

    Sequence membership is straightforward.

    &gt;&gt;&gt; &quot;Hello World&quot; in [s]
    True
    &gt;&gt;&gt; s in [&quot;Hello World&quot;]
    True

    You may test for set inclusion, but candidate and elements
    must both be folded.

    &gt;&gt;&gt; FoldedCase(&quot;Hello World&quot;) in {s}
    True
    &gt;&gt;&gt; s in {FoldedCase(&quot;Hello World&quot;)}
    True

    String inclusion works as long as the FoldedCase object
    is on the right.

    &gt;&gt;&gt; &quot;hello&quot; in FoldedCase(&quot;Hello World&quot;)
    True

    But not if the FoldedCase object is on the left:

    &gt;&gt;&gt; FoldedCase('hello') in 'Hello World'
    False

    In that case, use in_:

    &gt;&gt;&gt; FoldedCase('hello').in_('Hello World')
    True

    &gt;&gt;&gt; FoldedCase('hello') &gt; FoldedCase('Hello')
    False
    &quot;&quot;&quot;

    def __lt__(self, other):
        return self.lower() &lt; other.lower()

    def __gt__(self, other):
        return self.lower() &gt; other.lower()

    def __eq__(self, other):
        return self.lower() == other.lower()

    def __ne__(self, other):
        return self.lower() != other.lower()

    def __hash__(self):
        return hash(self.lower())

    def __contains__(self, other):
        return super().lower().__contains__(other.lower())

    def in_(self, other):
        &quot;Does self appear in other?&quot;
        return self in FoldedCase(other)

    # cache lower since it's likely to be called frequently.
    @method_cache
    def lower(self):
        return super().lower()

    def index(self, sub):
        return self.lower().index(sub.lower())

    def split(self, splitter=' ', maxsplit=0):
        pattern = re.compile(re.escape(splitter), re.I)
        return pattern.split(self, maxsplit)
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