pkg_resources.py 文件源码

def __init__(self, project_name, specs, extras):
        """DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
        self.unsafe_name, project_name = project_name, safe_name(project_name)
        self.project_name, self.key = project_name, project_name.lower()
        index = [(parse_version(v),state_machine[op],op,v) for op,v in specs]
        index.sort()
        self.specs = [(op,ver) for parsed,trans,op,ver in index]
        self.index, self.extras = index, tuple(map(safe_extra,extras))
        self.hashCmp = (
            self.key, tuple([(op,parsed) for parsed,trans,op,ver in index]),
            frozenset(self.extras)
        )
        self.__hash = hash(self.hashCmp)