index.py 文件源码

def is_artifact(self):
        """
        Determines if this points to an actual artifact (e.g. a tarball) or if
        it points to an "abstract" thing like a path or a VCS location.
        """
        from pip.vcs import vcs

        if self.scheme in vcs.all_schemes:
            return False

        return True


# An object to represent the "link" for the installed version of a requirement.
# Using Inf as the url makes it sort higher.