test
This commit is contained in:
@ -0,0 +1,599 @@
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import re
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import itertools
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import textwrap
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import functools
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try:
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from importlib.resources import files # type: ignore
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except ImportError: # pragma: nocover
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from setuptools.extern.importlib_resources import files # type: ignore
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from setuptools.extern.jaraco.functools import compose, method_cache
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from setuptools.extern.jaraco.context import ExceptionTrap
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def substitution(old, new):
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"""
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Return a function that will perform a substitution on a string
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"""
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return lambda s: s.replace(old, new)
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def multi_substitution(*substitutions):
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"""
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Take a sequence of pairs specifying substitutions, and create
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a function that performs those substitutions.
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>>> multi_substitution(('foo', 'bar'), ('bar', 'baz'))('foo')
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'baz'
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"""
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substitutions = itertools.starmap(substitution, substitutions)
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# compose function applies last function first, so reverse the
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# substitutions to get the expected order.
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substitutions = reversed(tuple(substitutions))
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return compose(*substitutions)
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class FoldedCase(str):
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"""
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A case insensitive string class; behaves just like str
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except compares equal when the only variation is case.
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>>> s = FoldedCase('hello world')
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>>> s == 'Hello World'
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True
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>>> 'Hello World' == s
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True
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>>> s != 'Hello World'
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False
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>>> s.index('O')
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4
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>>> s.split('O')
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['hell', ' w', 'rld']
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>>> sorted(map(FoldedCase, ['GAMMA', 'alpha', 'Beta']))
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['alpha', 'Beta', 'GAMMA']
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Sequence membership is straightforward.
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>>> "Hello World" in [s]
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True
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>>> s in ["Hello World"]
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True
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You may test for set inclusion, but candidate and elements
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must both be folded.
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>>> FoldedCase("Hello World") in {s}
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True
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>>> s in {FoldedCase("Hello World")}
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True
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String inclusion works as long as the FoldedCase object
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is on the right.
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>>> "hello" in FoldedCase("Hello World")
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True
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But not if the FoldedCase object is on the left:
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>>> FoldedCase('hello') in 'Hello World'
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False
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In that case, use ``in_``:
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>>> FoldedCase('hello').in_('Hello World')
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True
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>>> FoldedCase('hello') > FoldedCase('Hello')
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False
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"""
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def __lt__(self, other):
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return self.lower() < other.lower()
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def __gt__(self, other):
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return self.lower() > other.lower()
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def __eq__(self, other):
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return self.lower() == other.lower()
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def __ne__(self, other):
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return self.lower() != other.lower()
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def __hash__(self):
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return hash(self.lower())
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def __contains__(self, other):
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return super().lower().__contains__(other.lower())
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def in_(self, other):
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"Does self appear in other?"
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return self in FoldedCase(other)
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# cache lower since it's likely to be called frequently.
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@method_cache
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def lower(self):
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return super().lower()
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def index(self, sub):
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return self.lower().index(sub.lower())
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def split(self, splitter=' ', maxsplit=0):
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pattern = re.compile(re.escape(splitter), re.I)
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return pattern.split(self, maxsplit)
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# Python 3.8 compatibility
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_unicode_trap = ExceptionTrap(UnicodeDecodeError)
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@_unicode_trap.passes
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def is_decodable(value):
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r"""
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Return True if the supplied value is decodable (using the default
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encoding).
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>>> is_decodable(b'\xff')
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False
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>>> is_decodable(b'\x32')
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True
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"""
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value.decode()
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def is_binary(value):
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r"""
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Return True if the value appears to be binary (that is, it's a byte
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string and isn't decodable).
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>>> is_binary(b'\xff')
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True
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>>> is_binary('\xff')
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False
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"""
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return isinstance(value, bytes) and not is_decodable(value)
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def trim(s):
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r"""
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Trim something like a docstring to remove the whitespace that
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is common due to indentation and formatting.
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>>> trim("\n\tfoo = bar\n\t\tbar = baz\n")
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'foo = bar\n\tbar = baz'
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"""
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return textwrap.dedent(s).strip()
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def wrap(s):
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"""
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Wrap lines of text, retaining existing newlines as
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paragraph markers.
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>>> print(wrap(lorem_ipsum))
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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do
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eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad
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minim veniam, quis nostrud exercitation ullamco laboris nisi ut
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aliquip ex ea commodo consequat. Duis aute irure dolor in
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reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla
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pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
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culpa qui officia deserunt mollit anim id est laborum.
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<BLANKLINE>
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Curabitur pretium tincidunt lacus. Nulla gravida orci a odio. Nullam
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varius, turpis et commodo pharetra, est eros bibendum elit, nec luctus
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magna felis sollicitudin mauris. Integer in mauris eu nibh euismod
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gravida. Duis ac tellus et risus vulputate vehicula. Donec lobortis
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risus a elit. Etiam tempor. Ut ullamcorper, ligula eu tempor congue,
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eros est euismod turpis, id tincidunt sapien risus a quam. Maecenas
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fermentum consequat mi. Donec fermentum. Pellentesque malesuada nulla
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a mi. Duis sapien sem, aliquet nec, commodo eget, consequat quis,
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neque. Aliquam faucibus, elit ut dictum aliquet, felis nisl adipiscing
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sapien, sed malesuada diam lacus eget erat. Cras mollis scelerisque
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nunc. Nullam arcu. Aliquam consequat. Curabitur augue lorem, dapibus
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quis, laoreet et, pretium ac, nisi. Aenean magna nisl, mollis quis,
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molestie eu, feugiat in, orci. In hac habitasse platea dictumst.
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"""
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paragraphs = s.splitlines()
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wrapped = ('\n'.join(textwrap.wrap(para)) for para in paragraphs)
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return '\n\n'.join(wrapped)
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def unwrap(s):
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r"""
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Given a multi-line string, return an unwrapped version.
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>>> wrapped = wrap(lorem_ipsum)
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>>> wrapped.count('\n')
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20
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>>> unwrapped = unwrap(wrapped)
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>>> unwrapped.count('\n')
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1
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>>> print(unwrapped)
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Lorem ipsum dolor sit amet, consectetur adipiscing ...
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Curabitur pretium tincidunt lacus. Nulla gravida orci ...
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"""
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paragraphs = re.split(r'\n\n+', s)
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cleaned = (para.replace('\n', ' ') for para in paragraphs)
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return '\n'.join(cleaned)
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class Splitter(object):
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"""object that will split a string with the given arguments for each call
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>>> s = Splitter(',')
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>>> s('hello, world, this is your, master calling')
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['hello', ' world', ' this is your', ' master calling']
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"""
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def __init__(self, *args):
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self.args = args
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def __call__(self, s):
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return s.split(*self.args)
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def indent(string, prefix=' ' * 4):
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"""
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>>> indent('foo')
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' foo'
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"""
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return prefix + string
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class WordSet(tuple):
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"""
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Given an identifier, return the words that identifier represents,
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whether in camel case, underscore-separated, etc.
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>>> WordSet.parse("camelCase")
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('camel', 'Case')
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>>> WordSet.parse("under_sep")
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('under', 'sep')
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Acronyms should be retained
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>>> WordSet.parse("firstSNL")
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('first', 'SNL')
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>>> WordSet.parse("you_and_I")
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('you', 'and', 'I')
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>>> WordSet.parse("A simple test")
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('A', 'simple', 'test')
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Multiple caps should not interfere with the first cap of another word.
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>>> WordSet.parse("myABCClass")
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('my', 'ABC', 'Class')
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The result is a WordSet, so you can get the form you need.
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>>> WordSet.parse("myABCClass").underscore_separated()
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'my_ABC_Class'
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>>> WordSet.parse('a-command').camel_case()
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'ACommand'
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>>> WordSet.parse('someIdentifier').lowered().space_separated()
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'some identifier'
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Slices of the result should return another WordSet.
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>>> WordSet.parse('taken-out-of-context')[1:].underscore_separated()
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'out_of_context'
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>>> WordSet.from_class_name(WordSet()).lowered().space_separated()
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'word set'
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>>> example = WordSet.parse('figured it out')
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>>> example.headless_camel_case()
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'figuredItOut'
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>>> example.dash_separated()
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'figured-it-out'
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"""
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_pattern = re.compile('([A-Z]?[a-z]+)|([A-Z]+(?![a-z]))')
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def capitalized(self):
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return WordSet(word.capitalize() for word in self)
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def lowered(self):
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return WordSet(word.lower() for word in self)
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def camel_case(self):
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return ''.join(self.capitalized())
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def headless_camel_case(self):
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words = iter(self)
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first = next(words).lower()
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new_words = itertools.chain((first,), WordSet(words).camel_case())
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return ''.join(new_words)
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def underscore_separated(self):
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return '_'.join(self)
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def dash_separated(self):
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return '-'.join(self)
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def space_separated(self):
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return ' '.join(self)
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def trim_right(self, item):
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"""
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Remove the item from the end of the set.
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>>> WordSet.parse('foo bar').trim_right('foo')
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('foo', 'bar')
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>>> WordSet.parse('foo bar').trim_right('bar')
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('foo',)
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>>> WordSet.parse('').trim_right('bar')
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()
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"""
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return self[:-1] if self and self[-1] == item else self
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def trim_left(self, item):
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"""
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Remove the item from the beginning of the set.
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>>> WordSet.parse('foo bar').trim_left('foo')
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('bar',)
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>>> WordSet.parse('foo bar').trim_left('bar')
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('foo', 'bar')
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>>> WordSet.parse('').trim_left('bar')
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()
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"""
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return self[1:] if self and self[0] == item else self
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def trim(self, item):
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"""
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>>> WordSet.parse('foo bar').trim('foo')
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('bar',)
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"""
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return self.trim_left(item).trim_right(item)
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def __getitem__(self, item):
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result = super(WordSet, self).__getitem__(item)
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if isinstance(item, slice):
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result = WordSet(result)
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return result
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@classmethod
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def parse(cls, identifier):
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matches = cls._pattern.finditer(identifier)
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return WordSet(match.group(0) for match in matches)
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@classmethod
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def from_class_name(cls, subject):
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return cls.parse(subject.__class__.__name__)
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# for backward compatibility
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words = WordSet.parse
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def simple_html_strip(s):
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r"""
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Remove HTML from the string `s`.
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>>> str(simple_html_strip(''))
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''
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>>> print(simple_html_strip('A <bold>stormy</bold> day in paradise'))
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A stormy day in paradise
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>>> print(simple_html_strip('Somebody <!-- do not --> tell the truth.'))
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Somebody tell the truth.
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>>> print(simple_html_strip('What about<br/>\nmultiple lines?'))
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What about
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multiple lines?
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"""
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html_stripper = re.compile('(<!--.*?-->)|(<[^>]*>)|([^<]+)', re.DOTALL)
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texts = (match.group(3) or '' for match in html_stripper.finditer(s))
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return ''.join(texts)
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||||
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class SeparatedValues(str):
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"""
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A string separated by a separator. Overrides __iter__ for getting
|
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the values.
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||||
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||||
>>> list(SeparatedValues('a,b,c'))
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['a', 'b', 'c']
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||||
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||||
Whitespace is stripped and empty values are discarded.
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>>> list(SeparatedValues(' a, b , c, '))
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['a', 'b', 'c']
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"""
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||||
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||||
separator = ','
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||||
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||||
def __iter__(self):
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||||
parts = self.split(self.separator)
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||||
return filter(None, (part.strip() for part in parts))
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||||
|
||||
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||||
class Stripper:
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||||
r"""
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||||
Given a series of lines, find the common prefix and strip it from them.
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||||
|
||||
>>> lines = [
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||||
... 'abcdefg\n',
|
||||
... 'abc\n',
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||||
... 'abcde\n',
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||||
... ]
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||||
>>> res = Stripper.strip_prefix(lines)
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||||
>>> res.prefix
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||||
'abc'
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||||
>>> list(res.lines)
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||||
['defg\n', '\n', 'de\n']
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||||
|
||||
If no prefix is common, nothing should be stripped.
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||||
|
||||
>>> lines = [
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||||
... 'abcd\n',
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||||
... '1234\n',
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||||
... ]
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||||
>>> res = Stripper.strip_prefix(lines)
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||||
>>> res.prefix = ''
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||||
>>> list(res.lines)
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||||
['abcd\n', '1234\n']
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||||
"""
|
||||
|
||||
def __init__(self, prefix, lines):
|
||||
self.prefix = prefix
|
||||
self.lines = map(self, lines)
|
||||
|
||||
@classmethod
|
||||
def strip_prefix(cls, lines):
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||||
prefix_lines, lines = itertools.tee(lines)
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||||
prefix = functools.reduce(cls.common_prefix, prefix_lines)
|
||||
return cls(prefix, lines)
|
||||
|
||||
def __call__(self, line):
|
||||
if not self.prefix:
|
||||
return line
|
||||
null, prefix, rest = line.partition(self.prefix)
|
||||
return rest
|
||||
|
||||
@staticmethod
|
||||
def common_prefix(s1, s2):
|
||||
"""
|
||||
Return the common prefix of two lines.
|
||||
"""
|
||||
index = min(len(s1), len(s2))
|
||||
while s1[:index] != s2[:index]:
|
||||
index -= 1
|
||||
return s1[:index]
|
||||
|
||||
|
||||
def remove_prefix(text, prefix):
|
||||
"""
|
||||
Remove the prefix from the text if it exists.
|
||||
|
||||
>>> remove_prefix('underwhelming performance', 'underwhelming ')
|
||||
'performance'
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||||
|
||||
>>> remove_prefix('something special', 'sample')
|
||||
'something special'
|
||||
"""
|
||||
null, prefix, rest = text.rpartition(prefix)
|
||||
return rest
|
||||
|
||||
|
||||
def remove_suffix(text, suffix):
|
||||
"""
|
||||
Remove the suffix from the text if it exists.
|
||||
|
||||
>>> remove_suffix('name.git', '.git')
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||||
'name'
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||||
|
||||
>>> remove_suffix('something special', 'sample')
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||||
'something special'
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||||
"""
|
||||
rest, suffix, null = text.partition(suffix)
|
||||
return rest
|
||||
|
||||
|
||||
def normalize_newlines(text):
|
||||
r"""
|
||||
Replace alternate newlines with the canonical newline.
|
||||
|
||||
>>> normalize_newlines('Lorem Ipsum\u2029')
|
||||
'Lorem Ipsum\n'
|
||||
>>> normalize_newlines('Lorem Ipsum\r\n')
|
||||
'Lorem Ipsum\n'
|
||||
>>> normalize_newlines('Lorem Ipsum\x85')
|
||||
'Lorem Ipsum\n'
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||||
"""
|
||||
newlines = ['\r\n', '\r', '\n', '\u0085', '\u2028', '\u2029']
|
||||
pattern = '|'.join(newlines)
|
||||
return re.sub(pattern, '\n', text)
|
||||
|
||||
|
||||
def _nonblank(str):
|
||||
return str and not str.startswith('#')
|
||||
|
||||
|
||||
@functools.singledispatch
|
||||
def yield_lines(iterable):
|
||||
r"""
|
||||
Yield valid lines of a string or iterable.
|
||||
|
||||
>>> list(yield_lines(''))
|
||||
[]
|
||||
>>> list(yield_lines(['foo', 'bar']))
|
||||
['foo', 'bar']
|
||||
>>> list(yield_lines('foo\nbar'))
|
||||
['foo', 'bar']
|
||||
>>> list(yield_lines('\nfoo\n#bar\nbaz #comment'))
|
||||
['foo', 'baz #comment']
|
||||
>>> list(yield_lines(['foo\nbar', 'baz', 'bing\n\n\n']))
|
||||
['foo', 'bar', 'baz', 'bing']
|
||||
"""
|
||||
return itertools.chain.from_iterable(map(yield_lines, iterable))
|
||||
|
||||
|
||||
@yield_lines.register(str)
|
||||
def _(text):
|
||||
return filter(_nonblank, map(str.strip, text.splitlines()))
|
||||
|
||||
|
||||
def drop_comment(line):
|
||||
"""
|
||||
Drop comments.
|
||||
|
||||
>>> drop_comment('foo # bar')
|
||||
'foo'
|
||||
|
||||
A hash without a space may be in a URL.
|
||||
|
||||
>>> drop_comment('http://example.com/foo#bar')
|
||||
'http://example.com/foo#bar'
|
||||
"""
|
||||
return line.partition(' #')[0]
|
||||
|
||||
|
||||
def join_continuation(lines):
|
||||
r"""
|
||||
Join lines continued by a trailing backslash.
|
||||
|
||||
>>> list(join_continuation(['foo \\', 'bar', 'baz']))
|
||||
['foobar', 'baz']
|
||||
>>> list(join_continuation(['foo \\', 'bar', 'baz']))
|
||||
['foobar', 'baz']
|
||||
>>> list(join_continuation(['foo \\', 'bar \\', 'baz']))
|
||||
['foobarbaz']
|
||||
|
||||
Not sure why, but...
|
||||
The character preceeding the backslash is also elided.
|
||||
|
||||
>>> list(join_continuation(['goo\\', 'dly']))
|
||||
['godly']
|
||||
|
||||
A terrible idea, but...
|
||||
If no line is available to continue, suppress the lines.
|
||||
|
||||
>>> list(join_continuation(['foo', 'bar\\', 'baz\\']))
|
||||
['foo']
|
||||
"""
|
||||
lines = iter(lines)
|
||||
for item in lines:
|
||||
while item.endswith('\\'):
|
||||
try:
|
||||
item = item[:-2].strip() + next(lines)
|
||||
except StopIteration:
|
||||
return
|
||||
yield item
|
||||
Reference in New Issue
Block a user