install_egg_info.py 文件源码

def run(self):
        target = self.target
        if os.path.isdir(target) and not os.path.islink(target):
            dir_util.remove_tree(target, dry_run=self.dry_run)
        elif os.path.exists(target):
            self.execute(os.unlink,(self.target,),"Removing "+target)
        elif not os.path.isdir(self.install_dir):
            self.execute(os.makedirs, (self.install_dir,),
                         "Creating "+self.install_dir)
        log.info("Writing %s", target)
        if not self.dry_run:
            f = open(target, 'w')
            self.distribution.metadata.write_pkg_file(f)
            f.close()