Python candidate.InstallationCandidate方法代码示例

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def from_specifier(
        cls,
        candidates,     # type: List[InstallationCandidate]
        specifier,      # type: specifiers.BaseSpecifier
        prereleases,    # type: Optional[bool]
        evaluator,      # type: CandidateEvaluator
    ):
        # type: (...) -> FoundCandidates
        versions = {
            str(v) for v in specifier.filter(
                # We turn the version object into a str here because otherwise
                # when we're debundled but setuptools isn't, Python will see
                # packaging.version.Version and
                # pkg_resources._vendor.packaging.version.Version as different
                # types. This way we'll use a str as a common data interchange
                # format. If we stop using the pkg_resources provided specifier
                # and start using our own, we can drop the cast to str().
                (str(c.version) for c in candidates),
                prereleases=prereleases,
            )
        }
        return cls(candidates, versions, evaluator) 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def __init__(
        self,
        candidates,             # type: List[InstallationCandidate]
        applicable_candidates,  # type: List[InstallationCandidate]
        best_candidate,         # type: Optional[InstallationCandidate]
    ):
        # type: (...) -> None
        """
        :param candidates: A sequence of all available candidates found.
        :param applicable_candidates: The applicable candidates.
        :param best_candidate: The most preferred candidate found, or None
            if no applicable candidates were found.
        """
        assert set(applicable_candidates) <= set(candidates)

        if best_candidate is None:
            assert not applicable_candidates
        else:
            assert best_candidate in applicable_candidates

        self._applicable_candidates = applicable_candidates
        self._candidates = candidates

        self.best_candidate = best_candidate 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def compute_best_candidate(
        self,
        candidates,      # type: List[InstallationCandidate]
    ):
        # type: (...) -> BestCandidateResult
        """
        Compute and return a `BestCandidateResult` instance.
        """
        applicable_candidates = self.get_applicable_candidates(candidates)

        best_candidate = self.sort_best_candidate(applicable_candidates)

        return BestCandidateResult(
            candidates,
            applicable_candidates=applicable_candidates,
            best_candidate=best_candidate,
        ) 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def get_install_candidate(self, link_evaluator, link):
        # type: (LinkEvaluator, Link) -> Optional[InstallationCandidate]
        """
        If the link is a candidate for install, convert it to an
        InstallationCandidate and return it. Otherwise, return None.
        """
        is_candidate, result = link_evaluator.evaluate_link(link)
        if not is_candidate:
            if result:
                self._log_skipped_link(link, reason=result)
            return None

        return InstallationCandidate(
            name=link_evaluator.project_name,
            link=link,
            # Convert the Text result to str since InstallationCandidate
            # accepts str.
            version=str(result),
        ) 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def process_project_url(self, project_url, link_evaluator):
        # type: (Link, LinkEvaluator) -> List[InstallationCandidate]
        logger.debug(
            'Fetching project page and analyzing links: %s', project_url,
        )
        html_page = self._link_collector.fetch_page(project_url)
        if html_page is None:
            return []

        page_links = list(parse_links(html_page))

        with indent_log():
            package_links = self.evaluate_links(
                link_evaluator,
                links=page_links,
            )

        return package_links 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def get_install_candidate(self, link_evaluator, link):
        # type: (LinkEvaluator, Link) -> Optional[InstallationCandidate]
        """
        If the link is a candidate for install, convert it to an
        InstallationCandidate and return it. Otherwise, return None.
        """
        is_candidate, result = link_evaluator.evaluate_link(link)
        if not is_candidate:
            if result:
                self._log_skipped_link(link, reason=result)
            return None

        return InstallationCandidate(
            project=link_evaluator.project_name,
            link=link,
            # Convert the Text result to str since InstallationCandidate
            # accepts str.
            version=str(result),
        ) 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def make_found_candidates(
        self,
        candidates,      # type: List[InstallationCandidate]
    ):
        # type: (...) -> FoundCandidates
        """
        Create and return a `FoundCandidates` instance.

        :param specifier: An optional object implementing `filter`
            (e.g. `packaging.specifiers.SpecifierSet`) to filter applicable
            versions.
        """
        applicable_candidates = self.get_applicable_candidates(candidates)

        return FoundCandidates(
            candidates,
            applicable_candidates=applicable_candidates,
            evaluator=self,
        ) 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def _sort_key(self, candidate):
        # type: (InstallationCandidate) -> CandidateSortingKey
        """
        Function used to generate link sort key for link tuples.
        The greater the return value, the more preferred it is.
        If not finding wheels, then sorted by version only.
        If finding wheels, then the sort order is by version, then:
          1. existing installs
          2. wheels ordered via Wheel.support_index_min(self._valid_tags)
          3. source archives
        If prefer_binary was set, then all wheels are sorted above sources.
        Note: it was considered to embed this logic into the Link
              comparison operators, but then different sdist links
              with the same version, would have to be considered equal
        """
        support_num = len(self._valid_tags)
        build_tag = tuple()  # type: BuildTag
        binary_preference = 0
        if candidate.location.is_wheel:
            # can raise InvalidWheelFilename
            wheel = Wheel(candidate.location.filename)
            if not wheel.supported(self._valid_tags):
                raise UnsupportedWheel(
                    "%s is not a supported wheel for this platform. It "
                    "can't be sorted." % wheel.filename
                )
            if self._prefer_binary:
                binary_preference = 1
            pri = -(wheel.support_index_min(self._valid_tags))
            if wheel.build_tag is not None:
                match = re.match(r'^(\d+)(.*)$', wheel.build_tag)
                build_tag_groups = match.groups()
                build_tag = (int(build_tag_groups[0]), build_tag_groups[1])
        else:  # sdist
            pri = -(support_num)
        return (binary_preference, candidate.version, build_tag, pri) 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def get_best_candidate(self, candidates):
        # type: (List[InstallationCandidate]) -> InstallationCandidate
        """
        Return the best candidate per the instance's sort order, or None if
        no candidates are given.
        """
        if not candidates:
            return None

        return max(candidates, key=self._sort_key) 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def __init__(
        self,
        candidates,     # type: List[InstallationCandidate]
        versions,       # type: Set[str]
        evaluator,      # type: CandidateEvaluator
    ):
        # type: (...) -> None
        self._candidates = candidates
        self._evaluator = evaluator
        self._versions = versions 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def iter_all(self):
        # type: () -> Iterable[InstallationCandidate]
        """Iterate through all candidates.
        """
        return iter(self._candidates) 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def get_best(self):
        # type: () -> Optional[InstallationCandidate]
        """Return the best candidate available, or None if no applicable
        candidates are found.
        """
        candidates = list(self.iter_applicable())
        return self._evaluator.get_best_candidate(candidates) 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def _package_versions(
        self,
        links,  # type: Iterable[Link]
        search  # type: Search
    ):
        # type: (...) -> List[Optional[InstallationCandidate]]
        result = []
        for link in self._sort_links(links):
            v = self._link_package_versions(link, search)
            if v is not None:
                result.append(v)
        return result 

# 需要导入模块: from pip._internal.models import candidate [as 别名]
# 或者: from pip._internal.models.candidate import InstallationCandidate [as 别名]
def iter_applicable(self):
        # type: () -> Iterable[InstallationCandidate]
        """Iterate through candidates matching the versions associated with
        this instance.
        """
        # Again, converting version to str to deal with debundling.
        return (c for c in self.iter_all() if str(c.version) in self._versions)